Bank 3 (Part 1 of 2)

 NES ELITE GAME SOURCE (BANK 3)

 NES Elite was written by Ian Bell and David Braben and is copyright D. Braben
 and I. Bell 1991/1992

 The code in this file has been reconstructed from a disassembly of the version
 released on Ian Bell's personal website at http://www.elitehomepage.org/

 The commentary is copyright Mark Moxon, and any misunderstandings or mistakes
 in the documentation are entirely my fault

 The terminology and notations used in this commentary are explained at
 https://elite.bbcelite.com/terminology

 The deep dive articles referred to in this commentary can be found at
 https://elite.bbcelite.com/deep_dives


 This source file contains the game code for ROM bank 3 of NES Elite.


 This source file produces the following binary file:

   * bank3.bin


 ELITE BANK 3

 Produces the binary file bank1.bin.


 ORG CODE%


       Name: ResetMMC1_b3                                            [Show more]
       Type: Subroutine
   Category: Start and end
    Summary: The MMC1 mapper reset routine at the start of the ROM bank
  Deep dive: Splitting NES Elite across multiple ROM banks
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * Vectors_b3 calls ResetMMC1_b3


 When the NES is switched on, it is hardwired to perform a JMP ($FFFC). At this
 point, there is no guarantee as to which ROM banks are mapped to $8000 and
 $C000, so to ensure that the game starts up correctly, we put the same code
 in each ROM at the following locations:

   * We put $C000 in address $FFFC in every ROM bank, so the NES always jumps
     to $C000 when it starts up via the JMP ($FFFC), irrespective of which
     ROM bank is mapped to $C000.

   * We put the same reset routine (this routine, ResetMMC1) at the start of
     every ROM bank, so the same routine gets run, whichever ROM bank is mapped
     to $C000.

 This ResetMMC1 routine is therefore called when the NES starts up, whatever
 the bank configuration ends up being. It then switches ROM bank 7 to $C000 and
 jumps into bank 7 at the game's entry point BEGIN, which starts the game.


.ResetMMC1_b3

 SEI                    ; Disable interrupts

 INC $C006              ; Reset the MMC1 mapper, which we can do by writing a
                        ; value with bit 7 set into any address in ROM space
                        ; (i.e. any address from $8000 to $FFFF)
                        ;
                        ; The INC instruction does this in a more efficient
                        ; manner than an LDA/STA pair, as it:
                        ;
                        ;   * Fetches the contents of address $C006, which
                        ;     contains the high byte of the JMP destination
                        ;     below, i.e. the high byte of BEGIN, which is $C0
                        ;
                        ;   * Adds 1, to give $C1
                        ;
                        ;   * Writes the value $C1 back to address $C006
                        ;
                        ; $C006 is in the ROM space and $C1 has bit 7 set, so
                        ; the INC does all that is required to reset the mapper,
                        ; in fewer cycles and bytes than an LDA/STA pair
                        ;
                        ; Resetting MMC1 maps bank 7 to $C000 and enables the
                        ; bank at $8000 to be switched, so this instruction
                        ; ensures that bank 7 is present

 JMP BEGIN              ; Jump to BEGIN in bank 7 to start the game


       Name: Interrupts_b3                                           [Show more]
       Type: Subroutine
   Category: Start and end
    Summary: The IRQ and NMI handler while the MMC1 mapper reset routine is
             still running
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * Vectors_b3 calls Interrupts_b3


.Interrupts_b3

IF _NTSC

 RTI                    ; Return from the IRQ interrupt without doing anything
                        ;
                        ; This ensures that while the system is starting up and
                        ; the ROM banks are in an unknown configuration, any IRQ
                        ; interrupts that go via the vector at $FFFE and any NMI
                        ; interrupts that go via the vector at $FFFA will end up
                        ; here and be dealt with
                        ;
                        ; Once bank 7 is switched into $C000 by the ResetMMC1
                        ; routine, the vector is overwritten with the last two
                        ; bytes of bank 7, which point to the IRQ routine

ENDIF


       Name: versionNumber_b3                                        [Show more]
       Type: Variable
   Category: Text
    Summary: The game's version number in bank 3
    Context: See this variable on its own page
 References: No direct references to this variable in this source file


IF _NTSC

 EQUS " 5.0"

ELIF _PAL

 EQUS "<2.8>"

ENDIF


       Name: Copyright and version message                           [Show more]
       Type: Variable
   Category: Text
    Summary: A copyright and version message buried in the code
    Context: See this variable on its own page
 References: No direct references to this variable in this source file


IF _NTSC

 EQUS "  NES ELITE IMAGE 5.2"
 EQUS "  - "
 EQUS "  24 APR 1992"
 EQUS "  (C) D.Braben & I.Bell 1991/92"
 EQUS "  "

ELIF _PAL

 EQUS "  NES ELITE IMAGE 2.8"
 EQUS "  - "
 EQUS "  04 MAR 1992"
 EQUS "  (C) D.Braben & I.Bell 1991/92"
 EQUS "  "

ENDIF

 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
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 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $FF, $FF, $FF, $FF, $FF


       Name: iconBarImage0                                           [Show more]
       Type: Variable
   Category: Icon bar
    Summary: Image data for icon bar 0 (Docked)
    Context: See this variable on its own page
 References: This variable is used as follows:
             * ChooseLanguage uses iconBarImage0
             * SetupSprite0 uses iconBarImage0
             * ShowIconBar uses iconBarImage0


 You can view the tiles that make up the Docked icon bar here:

 https://elite.bbcelite.com/images/source/nes/iconBarImage0_ppu.png

 and you can see what the Docked icon bar looks like on-screen here:

 https://elite.bbcelite.com/images/nes/general/data_on_lave.png


.iconBarImage0

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 EQUB $03, $03, $03, $03, $03, $03, $07, $07
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 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $20, $1F, $00, $20, $00
 EQUB $3F, $3F, $3F, $1F, $20, $00, $5F, $40
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 EQUB $00, $20, $00, $08, $F0, $01, $09, $01
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 EQUB $DD, $E3, $FF, $FF, $00, $00, $FF, $00
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 EQUB $3A, $3A, $3C, $1F, $20, $00, $5F, $40
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 EQUB $07, $07, $0F, $3F, $00, $00, $FF, $00
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 EQUB $00, $00, $00, $00, $00, $00, $00, $00


       Name: iconBarImage1                                           [Show more]
       Type: Variable
   Category: Icon bar
    Summary: Image data for icon bar 1 (Flight)
    Context: See this variable on its own page
 References: No direct references to this variable in this source file


 You can view the tiles that make up the Flight icon bar here:

 https://elite.bbcelite.com/images/source/nes/iconBarImage0_ppu.png

 and you can see what the Flight icon bar looks like on-screen here:

 https://elite.bbcelite.com/images/nes/general/station.png


.iconBarImage1

 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FE, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $01, $01, $7D, $7D, $BB, $BB, $BB
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $E0, $F0, $F0, $F7, $F7, $FB, $FB, $FB
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $03, $03, $03, $03, $03, $03, $07, $07
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $C0, $C0, $C0, $C0, $C0, $C0, $E0, $E0
 EQUB $00, $00, $00, $01, $05, $06, $07, $06
 EQUB $0F, $1F, $1C, $D0, $D4, $B6, $B7, $B6
 EQUB $00, $00, $00, $84, $20, $50, $08, $50
 EQUB $FE, $FF, $01, $29, $55, $A9, $05, $A9
 EQUB $00, $00, $00, $00, $00, $00, $00, $01
 EQUB $FF, $F7, $61, $57, $41, $75, $43, $77
 EQUB $00, $00, $00, $00, $00, $40, $A0, $00
 EQUB $E0, $F0, $F0, $F7, $F7, $FB, $FB, $FB
 EQUB $00, $00, $0D, $00, $07, $00, $00, $00
 EQUB $0F, $1F, $12, $DF, $D8, $BF, $A5, $AD
 EQUB $00, $00, $6A, $00, $58, $00, $00, $00
 EQUB $FE, $FF, $95, $FF, $A7, $FF, $A0, $B5
 EQUB $00, $00, $1C, $63, $41, $80, $80, $80
 EQUB $FF, $FF, $FF, $FF, $FF, $F7, $E3, $F7
 EQUB $00, $00, $00, $40, $00, $80, $90, $80
 EQUB $E0, $F0, $F0, $B7, $F7, $FB, $EB, $FB
 EQUB $00, $00, $02, $00, $00, $04, $00, $01
 EQUB $0F, $1F, $1D, $DF, $DF, $BA, $BF, $BF
 EQUB $00, $00, $00, $04, $00, $00, $A0, $10
 EQUB $FE, $FF, $FF, $BB, $BF, $4F, $BF, $BF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $01, $01, $7D, $7D, $BB, $BA, $BB
 EQUB $00, $00, $00, $03, $27, $6F, $EF, $6F
 EQUB $FF, $FF, $FC, $D0, $A6, $6B, $E3, $65
 EQUB $00, $00, $00, $80, $C0, $E0, $E0, $E0
 EQUB $E0, $F0, $70, $97, $57, $EB, $2B, $2B
 EQUB $00, $00, $00, $02, $05, $08, $02, $01
 EQUB $0F, $1F, $1F, $DD, $D8, $B2, $B5, $BC
 EQUB $00, $00, $10, $28, $42, $84, $28, $52
 EQUB $FE, $FF, $EF, $C7, $95, $39, $53, $85
 EQUB $00, $00, $00, $00, $00, $00, $00, $01
 EQUB $00, $01, $01, $7D, $7D, $BB, $BB, $BA
 EQUB $00, $00, $02, $04, $08, $10, $E0, $C0
 EQUB $FF, $FF, $FC, $F8, $F1, $E3, $06, $0E
 EQUB $00, $00, $00, $00, $00, $03, $07, $02
 EQUB $0F, $1F, $1F, $DF, $DF, $BC, $B8, $B8
 EQUB $00, $08, $10, $20, $40, $80, $00, $40
 EQUB $FE, $F3, $E3, $C7, $8F, $1F, $3F, $3F
 EQUB $00, $00, $24, $1F, $1F, $7F, $1F, $1F
 EQUB $FF, $BB, $FB, $E0, $E0, $40, $E0, $E0
 EQUB $00, $00, $80, $00, $00, $C0, $00, $00
 EQUB $E0, $B0, $F0, $F7, $F7, $5B, $FB, $FB
 EQUB $00, $00, $00, $00, $01, $00, $00, $00
 EQUB $0F, $1F, $1F, $DE, $DD, $BC, $BF, $BC
 EQUB $00, $00, $40, $E0, $F0, $00, $00, $00
 EQUB $FE, $BF, $5F, $EF, $F7, $07, $FF, $07
 EQUB $00, $00, $00, $21, $31, $39, $31, $21
 EQUB $FF, $FF, $9C, $AD, $B5, $B9, $B5, $AD
 EQUB $00, $00, $00, $00, $80, $C0, $80, $00
 EQUB $E0, $F0, $F0, $77, $B7, $DB, $BB, $7B
 EQUB $00, $00, $00, $20, $1F, $00, $20, $00
 EQUB $3F, $3F, $3F, $1F, $20, $00, $5F, $40
 EQUB $00, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $FF, $FF, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $82, $01, $10, $92, $10
 EQUB $93, $93, $93, $11, $92, $00, $45, $44
 EQUB $00, $00, $00, $08, $F0, $01, $09, $01
 EQUB $F9, $F9, $F9, $F1, $09, $00, $F4, $04
 EQUB $00, $00, $00, $00, $00, $00, $01, $0B
 EQUB $0F, $0F, $1F, $1F, $3F, $3F, $7E, $74
 EQUB $00, $00, $00, $00, $00, $00, $80, $D0
 EQUB $F0, $F0, $F8, $F8, $FC, $FC, $7E, $2E
 EQUB $04, $01, $00, $20, $1F, $00, $20, $00
 EQUB $35, $30, $3C, $1F, $20, $00, $5F, $40
 EQUB $20, $00, $00, $00, $FF, $00, $00, $00
 EQUB $55, $AD, $01, $FF, $00, $00, $FF, $00
 EQUB $22, $54, $08, $00, $FF, $00, $00, $00
 EQUB $7F, $7F, $08, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $08, $F0, $01, $09, $01
 EQUB $F9, $F9, $19, $F1, $09, $00, $F4, $04
 EQUB $00, $00, $00, $20, $1F, $00, $20, $00
 EQUB $25, $2D, $24, $1F, $20, $00, $5F, $40
 EQUB $00, $00, $00, $00, $FF, $00, $00, $00
 EQUB $B4, $B5, $B4, $FF, $00, $00, $FF, $00
 EQUB $41, $63, $1C, $00, $FF, $00, $00, $00
 EQUB $FF, $FF, $FF, $FF, $00, $00, $FF, $00
 EQUB $00, $20, $00, $08, $F0, $01, $09, $01
 EQUB $F9, $D9, $F9, $F1, $09, $00, $F4, $04
 EQUB $06, $1C, $08, $20, $1F, $00, $20, $00
 EQUB $3F, $3F, $3F, $1F, $20, $00, $5F, $40
 EQUB $0C, $47, $02, $00, $FF, $00, $00, $00
 EQUB $FF, $BF, $FF, $FF, $00, $00, $FF, $00
 EQUB $27, $03, $00, $00, $FF, $00, $00, $00
 EQUB $A7, $D2, $FC, $FF, $00, $00, $FF, $00
 EQUB $C0, $80, $00, $08, $F0, $01, $09, $01
 EQUB $59, $99, $79, $F1, $09, $00, $F4, $04
 EQUB $00, $00, $00, $20, $1F, $00, $20, $00
 EQUB $3E, $3F, $3F, $1F, $20, $00, $5F, $40
 EQUB $80, $00, $00, $00, $FF, $00, $00, $00
 EQUB $2D, $7F, $FF, $FF, $00, $00, $FF, $00
 EQUB $90, $30, $20, $00, $FF, $00, $00, $00
 EQUB $09, $8E, $DE, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $08, $F0, $01, $09, $01
 EQUB $39, $F9, $F9, $F1, $09, $00, $F4, $04
 EQUB $04, $06, $00, $20, $1F, $00, $20, $00
 EQUB $34, $36, $31, $1F, $20, $00, $5F, $40
 EQUB $C0, $80, $00, $00, $FF, $00, $00, $00
 EQUB $3F, $7F, $FF, $FF, $00, $00, $FF, $00
 EQUB $24, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FB, $BB, $FF, $FF, $00, $00, $FF, $00
 EQUB $80, $00, $00, $08, $F0, $01, $09, $01
 EQUB $F9, $B9, $F9, $F1, $09, $00, $F4, $04
 EQUB $01, $00, $00, $20, $1F, $00, $20, $00
 EQUB $3D, $3C, $3F, $1F, $20, $00, $5F, $40
 EQUB $F0, $00, $00, $00, $FF, $00, $00, $00
 EQUB $F7, $07, $FF, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $00, $FF, $00, $00, $00
 EQUB $9C, $FF, $FF, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00


       Name: iconBarImage2                                           [Show more]
       Type: Variable
   Category: Icon bar
    Summary: Image data for icon bar 2 (Charts)
    Context: See this variable on its own page
 References: No direct references to this variable in this source file


 You can view the tiles that make up the Charts icon bar here:

 https://elite.bbcelite.com/images/source/nes/iconBarImage2_ppu.png

 and you can see what the Charts icon bar looks like on-screen here:

 https://elite.bbcelite.com/images/nes/general/short_range_chart.png


.iconBarImage2

 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FE, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $01, $01, $7D, $7D, $BB, $BB, $BB
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $E0, $F0, $F0, $F7, $F7, $FB, $FB, $FB
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $03, $03, $03, $03, $03, $03, $07, $07
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $C0, $C0, $C0, $C0, $C0, $C0, $E0, $E0
 EQUB $00, $00, $00, $00, $02, $06, $0E, $06
 EQUB $0F, $1F, $1C, $DC, $DA, $B6, $AE, $B6
 EQUB $00, $00, $00, $84, $20, $50, $88, $50
 EQUB $FE, $FF, $01, $29, $55, $A9, $05, $A9
 EQUB $00, $00, $00, $00, $00, $00, $00, $01
 EQUB $FF, $F7, $61, $57, $41, $75, $43, $77
 EQUB $00, $00, $00, $00, $00, $40, $A0, $00
 EQUB $E0, $F0, $F0, $F7, $F7, $FB, $FB, $FB
 EQUB $00, $00, $01, $06, $04, $08, $08, $08
 EQUB $0F, $1F, $1F, $DF, $DF, $BF, $BE, $BF
 EQUB $00, $00, $C0, $34, $10, $08, $09, $08
 EQUB $FE, $FF, $FF, $FB, $FF, $7F, $3E, $7F
 EQUB $00, $00, $00, $6C, $00, $5D, $00, $EC
 EQUB $FF, $FF, $FF, $92, $FE, $A3, $FE, $12
 EQUB $00, $00, $00, $00, $C0, $E0, $C0, $00
 EQUB $E0, $F0, $F0, $17, $D7, $FB, $DB, $1B
 EQUB $00, $00, $02, $00, $00, $04, $00, $01
 EQUB $0F, $1F, $1D, $DF, $DF, $BA, $BF, $BF
 EQUB $00, $00, $00, $04, $00, $00, $A0, $10
 EQUB $FE, $FF, $FF, $BB, $BF, $4F, $BF, $BF
 EQUB $00, $00, $04, $04, $04, $04, $7B, $04
 EQUB $FF, $FF, $FB, $C0, $DB, $DB, $84, $DB
 EQUB $00, $00, $00, $00, $00, $00, $C0, $00
 EQUB $E0, $F0, $F0, $77, $77, $7B, $3B, $7B
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $0F, $1F, $1E, $DC, $DF, $BF, $BF, $BF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FE, $FF, $0F, $E7, $C7, $8F, $9F, $FF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $01, $01, $7D, $7D, $BB, $BA, $BB
 EQUB $00, $00, $00, $03, $27, $6F, $EF, $6F
 EQUB $FF, $FF, $FC, $D0, $A6, $6B, $E3, $65
 EQUB $00, $00, $00, $80, $C0, $E0, $E0, $E0
 EQUB $E0, $F0, $70, $97, $57, $EB, $2B, $2B
 EQUB $00, $00, $00, $00, $02, $06, $0E, $06
 EQUB $0F, $1F, $1F, $DD, $DA, $B6, $AE, $B6
 EQUB $00, $00, $00, $00, $10, $30, $38, $38
 EQUB $FE, $FF, $FF, $C3, $A9, $46, $43, $85
 EQUB $00, $00, $01, $22, $54, $88, $22, $15
 EQUB $FF, $FF, $FE, $DC, $89, $23, $55, $C8
 EQUB $00, $00, $00, $80, $20, $40, $80, $20
 EQUB $E0, $F0, $F0, $77, $57, $9B, $3B, $5B
 EQUB $00, $00, $00, $00, $01, $00, $00, $00
 EQUB $0F, $1F, $1F, $DE, $DD, $BC, $BF, $BC
 EQUB $00, $00, $40, $E0, $F0, $00, $00, $00
 EQUB $FE, $BF, $5F, $EF, $F7, $07, $FF, $07
 EQUB $00, $00, $00, $21, $31, $39, $31, $21
 EQUB $FF, $FF, $9C, $AD, $B5, $B9, $B5, $AD
 EQUB $00, $00, $00, $00, $80, $C0, $80, $00
 EQUB $E0, $F0, $F0, $77, $B7, $DB, $BB, $7B
 EQUB $00, $00, $00, $20, $1F, $00, $20, $00
 EQUB $3F, $3F, $3F, $1F, $20, $00, $5F, $40
 EQUB $00, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $FF, $FF, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $82, $01, $10, $92, $10
 EQUB $93, $93, $93, $11, $92, $00, $45, $44
 EQUB $00, $00, $00, $08, $F0, $01, $09, $01
 EQUB $F9, $F9, $F9, $F1, $09, $00, $F4, $04
 EQUB $00, $00, $00, $00, $00, $00, $01, $0B
 EQUB $0F, $0F, $1F, $1F, $3F, $3F, $7E, $74
 EQUB $00, $00, $00, $00, $00, $00, $80, $D0
 EQUB $F0, $F0, $F8, $F8, $FC, $FC, $7E, $2E
 EQUB $02, $00, $00, $20, $1F, $00, $20, $00
 EQUB $3A, $3C, $3C, $1F, $20, $00, $5F, $40
 EQUB $20, $00, $00, $00, $FF, $00, $00, $00
 EQUB $55, $AD, $01, $FF, $00, $00, $FF, $00
 EQUB $22, $54, $08, $00, $FF, $00, $00, $00
 EQUB $7F, $7F, $08, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $08, $F0, $01, $09, $01
 EQUB $F9, $F9, $19, $F1, $09, $00, $F4, $04
 EQUB $04, $06, $01, $20, $1F, $00, $20, $00
 EQUB $3F, $3F, $3F, $1F, $20, $00, $5F, $40
 EQUB $10, $32, $C0, $00, $FF, $00, $00, $00
 EQUB $FF, $FD, $FF, $FF, $00, $00, $FF, $00
 EQUB $00, $DD, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $22, $FF, $FF, $00, $00, $FF, $00
 EQUB $00, $A0, $00, $08, $F0, $01, $09, $01
 EQUB $F9, $59, $F9, $F1, $09, $00, $F4, $04
 EQUB $06, $1C, $08, $20, $1F, $00, $20, $00
 EQUB $3F, $3F, $3F, $1F, $20, $00, $5F, $40
 EQUB $0C, $47, $02, $00, $FF, $00, $00, $00
 EQUB $FF, $BF, $FF, $FF, $00, $00, $FF, $00
 EQUB $04, $04, $04, $00, $FF, $00, $00, $00
 EQUB $DB, $C0, $FB, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $08, $F0, $01, $09, $01
 EQUB $79, $79, $F9, $F1, $09, $00, $F4, $04
 EQUB $00, $00, $00, $00, $FF, $00, $00, $00
 EQUB $9F, $9F, $FF, $FF, $00, $00, $FF, $00
 EQUB $27, $03, $00, $00, $FF, $00, $00, $00
 EQUB $A7, $D2, $FC, $FF, $00, $00, $FF, $00
 EQUB $C0, $80, $00, $08, $F0, $01, $09, $01
 EQUB $59, $99, $79, $F1, $09, $00, $F4, $04
 EQUB $02, $00, $00, $20, $1F, $00, $20, $00
 EQUB $3A, $3D, $3F, $1F, $20, $00, $5F, $40
 EQUB $18, $10, $00, $00, $FF, $00, $00, $00
 EQUB $C5, $2B, $87, $FF, $00, $00, $FF, $00
 EQUB $08, $00, $00, $00, $FF, $00, $00, $00
 EQUB $E2, $F7, $FF, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $08, $F0, $01, $09, $01
 EQUB $D9, $F9, $F9, $F1, $09, $00, $F4, $04
 EQUB $01, $00, $00, $20, $1F, $00, $20, $00
 EQUB $3D, $3C, $3F, $1F, $20, $00, $5F, $40
 EQUB $F0, $00, $00, $00, $FF, $00, $00, $00
 EQUB $F7, $07, $FF, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $00, $FF, $00, $00, $00
 EQUB $9C, $FF, $FF, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00


       Name: iconBarImage3                                           [Show more]
       Type: Variable
   Category: Icon bar
    Summary: Image data for icon bar 3 (Pause)
    Context: See this variable on its own page
 References: This variable is used as follows:
             * ChooseLanguage uses iconBarImage3


 You can view the tiles that make up the Pause icon bar here:

 https://elite.bbcelite.com/images/source/nes/iconBarImage3_ppu.png

 and you can see what the Pause icon bar looks like on-screen here:

 https://elite.bbcelite.com/images/nes/general/pause_icon_bar.png


.iconBarImage3

 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FE, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $01, $01, $7D, $7D, $BB, $BB, $BB
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $E0, $F0, $F0, $F7, $F7, $FB, $FB, $FB
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $03, $03, $03, $03, $03, $03, $07, $07
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $C0, $C0, $C0, $C0, $C0, $C0, $E0, $E0
 EQUB $00, $00, $01, $00, $00, $00, $00, $00
 EQUB $0F, $1C, $1D, $DE, $DF, $BF, $BF, $BF
 EQUB $00, $00, $F0, $E0, $40, $00, $00, $00
 EQUB $FE, $07, $F7, $EF, $5F, $BF, $FF, $BF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $01, $01, $7D, $7D, $BB, $BA, $BA
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FF, $FF, $FF, $E0, $9F, $7F, $FF, $FF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $E0, $F0, $F0, $F7, $37, $DB, $EB, $EB
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $0F, $1F, $1E, $DE, $DE, $BE, $BE, $B8
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FE, $FF, $03, $03, $FB, $FB, $FB, $E3
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FF, $FF, $FE, $FC, $C8, $C8, $C8, $C8
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $0F, $1F, $1C, $D8, $D8, $BC, $B8, $B8
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FE, $FF, $FF, $7F, $67, $C3, $43, $67
 EQUB $00, $00, $1F, $31, $3F, $28, $3F, $25
 EQUB $FF, $FF, $E0, $C0, $C0, $C0, $C0, $C0
 EQUB $00, $00, $00, $80, $80, $80, $80, $80
 EQUB $E0, $F0, $70, $77, $37, $3B, $3B, $3B
 EQUB $00, $00, $00, $00, $01, $00, $00, $00
 EQUB $0F, $1F, $1F, $DE, $DD, $BC, $BF, $BC
 EQUB $00, $00, $40, $E0, $F0, $00, $00, $00
 EQUB $FE, $BF, $5F, $EF, $F7, $07, $FF, $07
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FF, $FF, $FF, $EA, $9F, $7F, $FF, $FF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $E0, $F0, $F0, $F7, $B7, $FB, $FB, $FB
 EQUB $00, $00, $04, $02, $01, $00, $00, $00
 EQUB $0F, $1F, $1A, $DC, $DE, $BE, $BE, $B8
 EQUB $00, $00, $04, $08, $10, $A0, $40, $A0
 EQUB $FE, $FF, $03, $03, $EB, $5B, $BB, $43
 EQUB $00, $00, $40, $20, $11, $0A, $04, $0A
 EQUB $FF, $FF, $BE, $DC, $C8, $C0, $C8, $C0
 EQUB $00, $00, $40, $80, $00, $00, $00, $00
 EQUB $E0, $F0, $B0, $77, $F7, $FB, $FB, $FB
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $0F, $1F, $1F, $DE, $DE, $BE, $BF, $BE
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FE, $FF, $1F, $0F, $0F, $0F, $1F, $0F
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $20, $1F, $00, $20, $00
 EQUB $3F, $3F, $3F, $1F, $20, $00, $5F, $40
 EQUB $00, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $FF, $FF, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $82, $01, $10, $92, $10
 EQUB $93, $93, $93, $11, $92, $00, $45, $44
 EQUB $00, $00, $00, $08, $F0, $01, $09, $01
 EQUB $F9, $F9, $F9, $F1, $09, $00, $F4, $04
 EQUB $00, $00, $00, $00, $00, $00, $01, $0B
 EQUB $0F, $0F, $1F, $1F, $3F, $3F, $7E, $74
 EQUB $00, $00, $00, $00, $00, $00, $80, $D0
 EQUB $F0, $F0, $F8, $F8, $FC, $FC, $7E, $2E
 EQUB $00, $00, $01, $20, $1F, $00, $20, $00
 EQUB $3F, $3E, $3D, $1C, $20, $00, $5F, $40
 EQUB $40, $E0, $F0, $00, $FF, $00, $00, $00
 EQUB $5F, $EF, $F7, $07, $00, $00, $FF, $00
 EQUB $00, $00, $00, $00, $FF, $00, $00, $00
 EQUB $7F, $9F, $E0, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $08, $F0, $01, $09, $00
 EQUB $D9, $39, $F9, $F1, $09, $00, $F4, $04
 EQUB $00, $00, $00, $20, $1F, $00, $20, $00
 EQUB $30, $30, $39, $1F, $20, $00, $5F, $40
 EQUB $00, $00, $00, $00, $FF, $00, $00, $00
 EQUB $C3, $C3, $E7, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $00, $FF, $00, $00, $00
 EQUB $C8, $FC, $FE, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $00, $FF, $00, $00, $00
 EQUB $C3, $C3, $FF, $FF, $00, $00, $FF, $00
 EQUB $3F, $7F, $7F, $00, $FF, $00, $00, $00
 EQUB $C0, $E4, $FF, $FF, $00, $00, $FF, $00
 EQUB $80, $A0, $E0, $08, $F0, $01, $09, $01
 EQUB $39, $F9, $F9, $F1, $09, $00, $F4, $04
 EQUB $01, $00, $00, $20, $1F, $00, $20, $00
 EQUB $3D, $3E, $3F, $1F, $20, $00, $5F, $40
 EQUB $F0, $E0, $40, $00, $FF, $00, $00, $00
 EQUB $F7, $EF, $5F, $BF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $08, $F0, $01, $09, $01
 EQUB $D9, $39, $F9, $F1, $09, $00, $F4, $04
 EQUB $01, $02, $04, $20, $1F, $00, $20, $00
 EQUB $30, $30, $39, $1F, $20, $00, $5F, $40
 EQUB $10, $08, $04, $00, $FF, $00, $00, $00
 EQUB $C3, $C3, $E3, $FF, $00, $00, $FF, $00
 EQUB $11, $20, $40, $00, $FF, $00, $00, $00
 EQUB $C8, $DC, $BE, $FF, $00, $00, $FF, $00
 EQUB $00, $80, $40, $08, $F0, $01, $09, $01
 EQUB $F9, $79, $B9, $F1, $09, $00, $F4, $04
 EQUB $00, $00, $00, $20, $1F, $00, $20, $00
 EQUB $3C, $3C, $3F, $1F, $20, $00, $5F, $40
 EQUB $00, $00, $00, $00, $FF, $00, $00, $00
 EQUB $07, $07, $FF, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00


       Name: iconBarImage4                                           [Show more]
       Type: Variable
   Category: Icon bar
    Summary: Image data for icon bar 4 (Title screen copyright message)
    Context: See this variable on its own page
 References: No direct references to this variable in this source file


 You can view the tiles that make up the copyright message here:

 https://elite.bbcelite.com/images/source/nes/iconBarImage4_ppu.png

 and you can see what the copyright message looks like on-screen here:

 https://elite.bbcelite.com/images/nes/general/title.png


.iconBarImage4

 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $0F, $1F, $1F, $DF, $DF, $BF, $BF, $BF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FE, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $01, $01, $7D, $7D, $BB, $BB, $BB
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $E0, $F0, $F0, $F7, $F7, $FB, $FB, $FB
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $03, $03, $03, $03, $03, $03, $07, $07
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $C0, $C0, $C0, $C0, $C0, $C0, $E0, $E0
 EQUB $00, $00, $00, $00, $00, $F8, $00, $00
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $07, $FF
 EQUB $00, $00, $FB, $C3, $C3, $C3, $C3, $C3
 EQUB $FF, $FF, $FF, $C7, $FF, $FF, $FF, $FF
 EQUB $00, $00, $EF, $6D, $6D, $6D, $6F, $6C
 EQUB $FF, $FF, $FF, $7D, $FF, $FF, $FF, $FC
 EQUB $00, $00, $B6, $B6, $B6, $B6, $9E, $06
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $DF, $67
 EQUB $00, $00, $FB, $DB, $DB, $F3, $DB, $DB
 EQUB $FF, $FF, $FF, $DF, $FF, $F7, $DF, $FF
 EQUB $00, $00, $7D, $61, $61, $6D, $6D, $6D
 EQUB $FF, $FF, $FF, $E3, $FF, $FF, $FF, $FF
 EQUB $00, $00, $B7, $B3, $B3, $F3, $B3, $B3
 EQUB $FF, $FF, $FF, $FB, $FF, $FF, $BF, $FF
 EQUB $00, $00, $81, $00, $00, $00, $00, $00
 EQUB $FF, $FF, $FF, $7E, $FF, $FF, $FF, $FF
 EQUB $00, $00, $DF, $DB, $DB, $DB, $DF, $C3
 EQUB $FF, $FF, $FF, $FB, $FF, $FF, $FF, $E3
 EQUB $00, $00, $7D, $6C, $6C, $6C, $7C, $0C
 EQUB $FF, $FF, $FF, $EE, $FF, $FF, $FF, $8F
 EQUB $00, $00, $C0, $C0, $C0, $C0, $C0, $D8
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $00, $00, $F0, $D8, $D8, $D8, $D8, $DB
 EQUB $FF, $FF, $FF, $DF, $FF, $FF, $FF, $FF
 EQUB $00, $00, $7D, $6D, $6D, $79, $6D, $6D
 EQUB $FF, $FF, $FF, $EF, $FF, $FB, $EF, $EF
 EQUB $00, $00, $F7, $B6, $B6, $E7, $B6, $B6
 EQUB $FF, $FF, $FF, $BE, $FF, $EF, $BE, $FF
 EQUB $00, $00, $DF, $DB, $DB, $DE, $DB, $DB
 EQUB $FF, $FF, $FF, $FB, $FF, $FE, $FB, $FF
 EQUB $00, $00, $7D, $61, $61, $79, $61, $61
 EQUB $FF, $FF, $FF, $E3, $FF, $FF, $E7, $FF
 EQUB $00, $00, $F0, $B0, $B0, $B0, $B0, $B0
 EQUB $FF, $FF, $FF, $BF, $FF, $FF, $FF, $FF
 EQUB $00, $00, $3E, $36, $36, $3E, $36, $36
 EQUB $FF, $FF, $FF, $F7, $FF, $FF, $F7, $FF
 EQUB $00, $00, $FB, $DB, $DB, $DB, $DB, $DB
 EQUB $FF, $FF, $FF, $DF, $FF, $FF, $FF, $FF
 EQUB $00, $00, $C0, $60, $60, $60, $60, $60
 EQUB $FF, $FF, $FF, $7F, $FF, $FF, $FF, $FF
 EQUB $00, $00, $78, $30, $30, $30, $30, $33
 EQUB $FF, $FF, $FF, $B7, $FF, $FF, $FF, $FF
 EQUB $00, $00, $7D, $6D, $6D, $79, $6D, $6D
 EQUB $FF, $FF, $FF, $EF, $FF, $FB, $EF, $FF
 EQUB $00, $00, $F6, $86, $86, $E6, $86, $86
 EQUB $FF, $FF, $FF, $8F, $FF, $FF, $9F, $FF
 EQUB $00, $00, $18, $18, $18, $18, $18, $18
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF
 EQUB $00, $00, $00, $00, $00, $1F, $00, $00
 EQUB $FF, $FF, $FF, $FF, $FF, $FF, $E0, $FF
 EQUB $00, $00, $00, $20, $1F, $00, $20, $00
 EQUB $3F, $3F, $3F, $1F, $20, $00, $5F, $40
 EQUB $00, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $FF, $FF, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $82, $01, $10, $92, $10
 EQUB $93, $93, $93, $11, $92, $00, $45, $44
 EQUB $00, $00, $00, $08, $F0, $01, $09, $01
 EQUB $F9, $F9, $F9, $F1, $09, $00, $F4, $04
 EQUB $00, $00, $00, $00, $00, $00, $01, $0B
 EQUB $0F, $0F, $1F, $1F, $3F, $3F, $7E, $74
 EQUB $00, $00, $00, $00, $00, $00, $80, $D0
 EQUB $F0, $F0, $F8, $F8, $FC, $FC, $7E, $2E
 EQUB $FB, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $04, $FF, $FF, $00, $00, $FF, $00
 EQUB $EC, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $13, $FF, $FF, $00, $00, $FF, $00
 EQUB $0C, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FD, $F3, $FF, $FF, $00, $00, $FF, $00
 EQUB $DB, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $24, $FF, $FF, $00, $00, $FF, $00
 EQUB $7D, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $82, $FF, $FF, $00, $00, $FF, $00
 EQUB $B3, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $4C, $FF, $FF, $00, $00, $FF, $00
 EQUB $C3, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $3C, $FF, $FF, $00, $00, $FF, $00
 EQUB $0C, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $F3, $FF, $FF, $00, $00, $FF, $00
 EQUB $D8, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $27, $FF, $FF, $00, $00, $FF, $00
 EQUB $F3, $00, $00, $00, $FF, $00, $00, $00
 EQUB $F7, $0C, $FF, $FF, $00, $00, $FF, $00
 EQUB $B6, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $49, $FF, $FF, $00, $00, $FF, $00
 EQUB $DF, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $20, $FF, $FF, $00, $00, $FF, $00
 EQUB $B0, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $4F, $FF, $FF, $00, $00, $FF, $00
 EQUB $36, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $C9, $FF, $FF, $00, $00, $FF, $00
 EQUB $C0, $00, $00, $00, $FF, $00, $00, $00
 EQUB $DF, $3F, $FF, $FF, $00, $00, $FF, $00
 EQUB $7B, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $84, $FF, $FF, $00, $00, $FF, $00
 EQUB $F7, $00, $00, $00, $FF, $00, $00, $00
 EQUB $FF, $08, $FF, $FF, $00, $00, $FF, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00
 EQUB $00, $00, $00, $00, $00, $00, $00, $00


       Name: barNames0                                               [Show more]
       Type: Variable
   Category: Icon bar
    Summary: Nametable entries for icon bar 0 (Docked)
    Context: See this variable on its own page
 References: This variable is used as follows:
             * DrawIconBar uses barNames0


.barNames0

 EQUB $09, $0B, $0C, $06, $0D, $0E, $0F, $10
 EQUB $06, $11, $12, $13, $14, $06, $15, $16
 EQUB $17, $18, $06, $19, $1A, $1B, $1C, $06
 EQUB $07, $08, $04, $05, $06, $07, $08, $0A
 EQUB $28, $2A, $2B, $26, $2C, $2D, $2E, $2F
 EQUB $26, $30, $31, $24, $32, $26, $33, $34
 EQUB $24, $35, $26, $36, $37, $38, $39, $26
 EQUB $25, $27, $24, $25, $26, $25, $27, $29


       Name: barNames1                                               [Show more]
       Type: Variable
   Category: Icon bar
    Summary: Nametable entries for icon bar 1 (Flight)
    Context: See this variable on its own page
 References: No direct references to this variable in this source file


.barNames1

 EQUB $09, $0B, $0C, $06, $0D, $0E, $0F, $10
 EQUB $06, $11, $12, $13, $14, $15, $16, $17
 EQUB $18, $19, $1A, $1B, $08, $1C, $1D, $06
 EQUB $1E, $1F, $20, $21, $06, $22, $23, $0A
 EQUB $28, $2A, $2B, $26, $2C, $2D, $2E, $2F
 EQUB $26, $30, $31, $32, $33, $26, $34, $35
 EQUB $36, $37, $26, $38, $39, $3A, $3B, $26
 EQUB $3C, $3D, $3E, $3F, $26, $40, $27, $29


       Name: barNames2                                               [Show more]
       Type: Variable
   Category: Icon bar
    Summary: Nametable entries for icon bar 2 (Charts)
    Context: See this variable on its own page
 References: No direct references to this variable in this source file


.barNames2

 EQUB $09, $0B, $0C, $06, $0D, $0E, $0F, $10
 EQUB $06, $11, $12, $13, $14, $06, $15, $16
 EQUB $17, $18, $19, $1A, $1B, $1C, $1D, $06
 EQUB $1E, $1F, $20, $21, $06, $22, $23, $0A
 EQUB $28, $2A, $2B, $26, $2C, $2D, $2E, $2F
 EQUB $26, $30, $31, $32, $33, $26, $34, $35
 EQUB $24, $36, $26, $37, $38, $39, $3A, $26
 EQUB $3B, $3C, $3D, $3E, $26, $3F, $27, $29


       Name: barNames3                                               [Show more]
       Type: Variable
   Category: Icon bar
    Summary: Nametable entries for icon bar 3 (Pause)
    Context: See this variable on its own page
 References: This variable is used as follows:
             * Draw2OptionTiles uses barNames3


.barNames3

 EQUB $09, $0B, $0C, $0D, $0E, $0F, $10, $11
 EQUB $06, $12, $08, $13, $14, $06, $15, $16
 EQUB $17, $18, $0D, $19, $1A, $1B, $1C, $06
 EQUB $1D, $1E, $1F, $20, $06, $15, $16, $0A
 EQUB $28, $2A, $2B, $26, $2C, $2D, $2E, $2F
 EQUB $26, $30, $27, $24, $31, $26, $32, $33
 EQUB $34, $35, $26, $2C, $36, $37, $38, $26
 EQUB $39, $3A, $3B, $3C, $26, $32, $33, $29


       Name: barNames4                                               [Show more]
       Type: Variable
   Category: Icon bar
    Summary: Nametable entries for icon bar 4 (Title screen copyright message)
    Context: See this variable on its own page
 References: No direct references to this variable in this source file


.barNames4

 EQUB $0A, $05, $08, $0C, $0D, $0E, $0F, $10
 EQUB $11, $12, $13, $14, $15, $16, $08, $17
 EQUB $18, $19, $1A, $1B, $1C, $1D, $1E, $1F
 EQUB $20, $21, $22, $23, $24, $08, $09, $0B
 EQUB $29, $25, $26, $26, $2B, $2C, $2D, $2E
 EQUB $2F, $30, $26, $31, $32, $33, $26, $34
 EQUB $2F, $35, $36, $2F, $37, $38, $2E, $39
 EQUB $3A, $2F, $3B, $36, $26, $26, $28, $2A


       Name: dashNames                                               [Show more]
       Type: Variable
   Category: Dashboard
    Summary: Nametable entries for the dashboard
    Context: See this variable on its own page
 References: This variable is used as follows:
             * DrawDashNames uses dashNames


.dashNames

 EQUB $45, $46, $47, $48, $47, $49, $4A, $4B
 EQUB $4C, $4D, $4E, $4F, $4D, $4C, $4D, $4E
 EQUB $4F, $4D, $4C, $4D, $50, $4F, $4D, $4C
 EQUB $51, $52, $46, $47, $48, $47, $49, $53
 EQUB $54, $55, $55, $55, $55, $56, $57, $58
 EQUB $59, $00, $5A, $5B, $5C, $5D, $5E, $5F
 EQUB $60, $61, $62, $63, $64, $65, $00, $66
 EQUB $67, $68, $69, $6A, $6B, $85, $85, $6E
 EQUB $54, $55, $55, $55, $55, $6F, $70, $00
 EQUB $71, $72, $73, $74, $75, $76, $77, $78
 EQUB $79, $7A, $7B, $7C, $7D, $7E, $7F, $80
 EQUB $00, $81, $82, $83, $84, $85, $85, $6E
 EQUB $54, $55, $55, $55, $55, $86, $70, $87
 EQUB $88, $89, $8A, $8B, $8C, $8D, $8C, $8E
 EQUB $8F, $8C, $90, $8C, $91, $92, $93, $94
 EQUB $95, $96, $97, $55, $55, $55, $55, $98
 EQUB $54, $55, $55, $55, $55, $99, $9A, $9B
 EQUB $9C, $9D, $9E, $9F, $A0, $A1, $A2, $A2
 EQUB $A3, $A2, $A4, $A0, $A5, $A6, $A7, $A8
 EQUB $A9, $AA, $AB, $55, $55, $55, $55, $98
 EQUB $54, $55, $55, $55, $55, $AC, $AD, $58
 EQUB $AE, $AF, $B0, $B1, $B2, $B3, $B4, $B5
 EQUB $B6, $B7, $B8, $B9, $BA, $BB, $BC, $BD
 EQUB $67, $BE, $BF, $55, $55, $55, $55, $98
 EQUB $54, $55, $55, $55, $55, $C0, $C1, $00
 EQUB $00, $00, $00, $00, $C2, $C3, $C4, $C5
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       Name: dashImage                                               [Show more]
       Type: Variable
   Category: Dashboard
    Summary: Packed image data for the dashboard
  Deep dive: Image and data compression
             Views and view types in NES Elite
    Context: See this variable on its own page
 References: This variable is used as follows:
             * SendDashImageToPPU uses dashImage


 You can view the tiles that make up the dashboard image here:

 https://elite.bbcelite.com/images/source/nes/dashImage_ppu.png

 and you can see what the dashboard looks like on-screen here:

 https://elite.bbcelite.com/images/nes/general/dashboard.png


.dashImage

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 EQUB $05, $34, $18, $3C, $3C, $18, $02, $70
 EQUB $24, $60, $23, $C0, $70, $23, $60, $22
 EQUB $40, $22, $C0, $7F, $24, $60, $23, $C0
 EQUB $7F, $23, $60, $22, $40, $22, $C0, $22
 EQUB $60, $24, $C0, $12, $60, $22, $40, $23
 EQUB $C0, $FF, $FE, $24, $C0, $0C, $18, $08
 EQUB $3F


       Name: cobraImage                                              [Show more]
       Type: Variable
   Category: Equipment
    Summary: Packed image data for the Cobra Mk III shown on the Equip Ship
             screen
  Deep dive: Image and data compression
    Context: See this variable on its own page
 References: This variable is used as follows:
             * SendViewToPPU uses cobraImage


 You can view the tiles that make up the Cobra Mk III image here:

 https://elite.bbcelite.com/images/source/nes/cobraImage_ppu.png

 and you can see what the Cobra Mk III looks like on-screen here:

 https://elite.bbcelite.com/images/nes/general/equipment.png


.cobraImage

 EQUB $07, $21, $01, $0B, $32, $05, $34, $6B
 EQUB $D6, $9F, $03, $34, $02, $0F, $1F, $3F
 EQUB $7F, $02, $14, $DF, $B7, $03, $12, $7F
 EQUB $BF, $CF, $02, $FE, $F5, $F9, $FB, $FD
 EQUB $D3, $03, $22, $FE, $FD, $FB, $FF, $03
 EQUB $C0, $B0, $CC, $F2, $69, $04, $C0, $F0
 EQUB $EC, $F6, $06, $32, $02, $0B, $06, $32
 EQUB $01, $07, $05, $21, $2B, $EA, $FC, $05
 EQUB $21, $1F, $F5, $FF, $04, $21, $01, $FF
 EQUB $5F, $F9, $05, $12, $21, $07, $04, $9F
 EQUB $FF, $EE, $BB, $04, $7F, $13, $03, $21
 EQUB $19, $12, $E0, $BF, $03, $21, $07, $14
 EQUB $03, $FD, $FB, $E6, $D8, $21, $27, $03
 EQUB $22, $FE, $12, $DF, $03, $BE, $DF, $DA
 EQUB $FD, $C5, $03, $7F, $BF, $EC, $21, $36
 EQUB $FB, $03, $60, $FF, $10, $7E, $A7, $03
 EQUB $80, $FF, $33, $0F, $01, $18, $04, $21
 EQUB $1E, $5F, $10, $CE, $04, $E0, $FF, $EF
 EQUB $21, $31, $05, $40, $21, $03, $F6, $05
 EQUB $FF, $FC, $21, $01, $05, $E0, $32, $0A
 EQUB $2F, $06, $21, $05, $D0, $06, $80, $E0
 EQUB $0E, $32, $01, $06, $07, $34, $01, $03
 EQUB $06, $19, $30, $65, $D2, $67, $87, $00
 EQUB $38, $01, $06, $0F, $1B, $2F, $1F, $3F
 EQUB $2F, $5F, $FF, $FE, $79, $F7, $FF, $EF
 EQUB $16, $F7, $FF, $F3, $DF, $EE, $21, $14
 EQUB $EB, $FD, $FB, $F7, $DC, $FE, $12, $F6
 EQUB $FA, $22, $FC, $9E, $F5, $CE, $BC, $98
 EQUB $68, $D0, $E0, $67, $EF, $FF, $DF, $FF
 EQUB $BF, $22, $7F, $B4, $58, $86, $21, $03
 EQUB $00, $21, $01, $02, $FB, $FF, $FD, $FE
 EQUB $14, $80, $40, $10, $48, $B4, $4A, $BF
 EQUB $21, $2C, $00, $80, $E0, $B0, $48, $A4
 EQUB $C0, $D1, $07, $C0, $08, $20, $FF, $00
 EQUB $21, $05, $04, $21, $1F, $07, $21, $01
 EQUB $EA, $21, $02, $7F, $21, $06, $03, $FE
 EQUB $21, $14, $06, $6B, $81, $FA, $FE, $A1
 EQUB $21, $0E, $02, $21, $1C, $7F, $21, $05
 EQUB $05, $A7, $8C, $21, $11, $00, $55, $03
 EQUB $5F, $F3, $EE, $05, $7E, $DD, $21, $16
 EQUB $FC, $68, $21, $0A, $85, $21, $01, $FF
 EQUB $21, $3E, $E9, $22, $03, $21, $01, $02
 EQUB $BF, $7F, $FD, $32, $3F, $0B, $E8, $F5
 EQUB $FE, $7F, $12, $C0, $F4, $03, $FB, $FD
 EQUB $00, $F8, $D4, $02, $A1, $FC, $FE, $FF
 EQUB $05, $78, $86, $BF, $21, $1F, $00, $80
 EQUB $53, $00, $87, $78, $06, $21, $3D, $E0
 EQUB $FF, $F0, $00, $21, $0A, $C0, $00, $C0
 EQUB $21, $1F, $06, $83, $FF, $FE, $00, $21
 EQUB $02, $C0, $02, $7C, $07, $12, $00, $21
 EQUB $13, $C0, $0B, $F8, $FE, $00, $80, $0F
 EQUB $01, $34, $01, $03, $06, $0D, $06, $35
 EQUB $01, $02, $0D, $1F, $3A, $74, $A9, $52
 EQUB $81, $35, $27, $02, $00, $05, $0B, $57
 EQUB $AF, $21, $3F, $5B, $8F, $34, $1F, $3F
 EQUB $7F, $3F, $DF, $EE, $FD, $5F, $16, $F7
 EQUB $12, $EF, $D5, $AB, $54, $BB, $71, $22
 EQUB $EF, $12, $F7, $FB, $FC, $FE, $F9, $F5
 EQUB $E9, $B2, $4C, $B2, $DE, $F2, $23, $FE
 EQUB $FD, $F3, $CD, $32, $21, $01, $80, $00
 EQUB $C0, $D0, $B4, $AC, $92, $E4, $12, $21
 EQUB $3F, $6F, $7B, $7F, $6F, $21, $23, $06
 EQUB $80, $A0, $16, $7F, $DF, $37, $1C, $2C
 EQUB $04, $05, $02, $00, $01, $00, $E0, $F0
 EQUB $22, $F8, $FC, $22, $FE, $FF, $E0, $30
 EQUB $98, $4C, $A7, $FB, $7D, $BD, $0D, $80
 EQUB $C0, $60, $0C, $34, $01, $02, $0C, $1D
 EQUB $05, $35, $01, $03, $03, $1A, $1C, $65
 EQUB $B9, $21, $12, $60, $C2, $A1, $33, $04
 EQUB $01, $02, $40, $EC, $DF, $BF, $5E, $4B
 EQUB $95, $32, $2E, $17, $6F, $BF, $5F, $FA
 EQUB $BF, $7F, $12, $21, $3F, $7F, $14, $FB
 EQUB $54, $E9, $E6, $D8, $7F, $FB, $FD, $FE
 EQUB $FF, $BE, $D8, $E0, $80, $A5, $4F, $B5
 EQUB $CA, $B1, $7E, $21, $1F, $DF, $F8, $F0
 EQUB $C0, $05, $E2, $82, $21, $3B, $DA, $73
 EQUB $21, $1F, $C3, $D8, $22, $01, $00, $21
 EQUB $01, $04, $82, $C0, $8E, $CC, $60, $D7
 EQUB $72, $21, $18, $61, $20, $60, $36, $21
 EQUB $07, $28, $01, $07, $28, $96, $45, $21
 EQUB $0F, $F9, $40, $02, $F7, $79, $21, $3E
 EQUB $F0, $32, $07, $3F, $12, $00, $D3, $EB
 EQUB $FE, $BA, $6F, $36, $2E, $0F, $FF, $2C
 EQUB $14, $01, $C1, $22, $D0, $FC, $32, $3D
 EQUB $1C, $AD, $95, $6D, $73, $21, $3D, $F2
 EQUB $80, $C0, $40, $20, $10, $21, $08, $40
 EQUB $21, $04, $10, $21, $08, $42, $21, $11
 EQUB $40, $22, $50, $D0, $0C, $80, $00, $20
 EQUB $21, $08, $08, $21, $3F, $7A, $BD, $9E
 EQUB $85, $AA, $D9, $FC, $00, $21, $05, $42
 EQUB $61, $72, $51, $20, $00, $45, $8B, $34
 EQUB $16, $2B, $54, $31, $64, $F2, $BF, $7D
 EQUB $FB, $F7, $EF, $CE, $98, $00, $F4, $A3
 EQUB $CC, $10, $44, $90, $60, $FD, $FF, $FC
 EQUB $F0, $E0, $80, $03, $D5, $55, $02, $21
 EQUB $05, $02, $48, $08, $5B, $4E, $34, $1D
 EQUB $0A, $51, $02, $0A, $DF, $FE, $DE, $85
 EQUB $39, $2E, $03, $80, $01, $00, $01, $01
 EQUB $00, $01, $03, $50, $E8, $FD, $7F, $D0
 EQUB $7E, $38, $2F, $15, $2F, $17, $02, $00
 EQUB $2F, $01, $02, $BE, $21, $03, $42, $F3
 EQUB $21, $1D, $BF, $22, $ED, $41, $FC, $BD
 EQUB $21, $0C, $E0, $40, $02, $33, $23, $02
 EQUB $2E, $00, $82, $55, $AD, $EA, $DD, $FD
 EQUB $D1, $FF, $7D, $AA, $50, $00, $FD, $EF
 EQUB $32, $3B, $0C, $BB, $C1, $AA, $FF, $21
 EQUB $02, $80, $E0, $F0, $44, $21, $3E, $55
 EQUB $00, $50, $70, $B0, $D0, $60, $E9, $21
 EQUB $37, $CA, $08, $34, $04, $02, $16, $0A
 EQUB $42, $A0, $21, $02, $8E, $08, $35, $0E
 EQUB $04, $06, $04, $08, $03, $34, $04, $0E
 EQUB $0C, $08, $08, $34, $04, $0C, $1C, $0A
 EQUB $05, $22, $0E, $21, $04, $02, $60, $05
 EQUB $80, $50, $7D, $0C, $21, $0D, $0E, $60
 EQUB $B0, $07, $60, $3E, $0B, $07, $0F, $0A
 EQUB $1F, $16, $19, $0F, $04, $02, $01, $05
 EQUB $00, $09, $21, $06, $00, $78, $F8, $68
 EQUB $70, $22, $F0, $E0, $00, $90, $10, $90
 EQUB $A0, $40, $80, $02, $21, $08, $00, $21
 EQUB $08, $03, $21, $18, $00, $21, $18, $00
 EQUB $35, $18, $08, $00, $18, $3C, $20, $7E
 EQUB $5A, $3E, $24, $3C, $34, $2C, $3C, $2C
 EQUB $00, $3C, $18, $00, $08, $18, $00, $18
 EQUB $03, $A0, $07, $B0, $A0, $08, $33, $3C
 EQUB $34, $2C, $06, $21, $18, $10, $21, $04
 EQUB $00, $21, $04, $03, $21, $18, $00, $37
 EQUB $2C, $04, $2C, $04, $00, $18, $3C, $20
 EQUB $7E, $5A, $66, $7E, $7A, $56, $7A, $56
 EQUB $00, $37, $3C, $18, $00, $04, $2C, $04
 EQUB $2C, $02, $A0, $07, $F0, $A0, $00, $A0
 EQUB $06, $21, $3C, $22, $7A, $21, $24, $04
 EQUB $37, $18, $24, $24, $18, $00, $08, $08
 EQUB $03, $21, $18, $02, $22, $18, $21, $08
 EQUB $00, $32, $18, $3C, $20, $7E, $5A, $3D
 EQUB $24, $3C, $34, $2C, $2C, $3C, $00, $3C
 EQUB $18, $00, $08, $18, $18, $04, $C0, $07
 EQUB $E0, $C0, $09, $21, $18, $10, $06, $22
 EQUB $18, $3A, $28, $08, $24, $00, $08, $10
 EQUB $08, $10, $34, $34, $02, $10, $21, $18
 EQUB $10, $00, $35, $3C, $2C, $34, $2C, $3C
 EQUB $7E, $4A, $6A, $00, $10, $21, $18, $10
 EQUB $02, $22, $34, $02, $A0, $21, $05, $CA
 EQUB $20, $04, $C0, $CE, $21, $04, $C0, $06
 EQUB $7E, $22, $7A, $66, $04, $36, $18, $24
 EQUB $24, $18, $00, $0F, $20, $60, $04, $32
 EQUB $06, $2F, $78, $F0, $0D, $C0, $32, $0A
 EQUB $03, $04, $22, $7E, $21, $3C, $05, $22
 EQUB $30, $08, $99, $21, $33, $66, $CC, $99
 EQUB $21, $33, $0A, $66, $80, $99, $32, $33
 EQUB $26, $8C, $03, $4C, $32, $19, $33, $66
 EQUB $4C, $21, $38, $76, $C2, $C3, $83, $46
 EQUB $7C, $21, $18, $C7, $BB, $23, $7D, $BB
 EQUB $C7, $FF, $35, $08, $2C, $3C, $2C, $04
 EQUB $03, $34, $04, $1C, $7C, $1C, $04, $80
 EQUB $00, $CD, $06, $80, $F0, $08, $60, $70
 EQUB $30, $32, $08, $04, $03, $7C, $6C, $4C
 EQUB $74, $78, $05, $21, $08, $00, $21, $08
 EQUB $03, $2B, $08, $02, $24, $08, $22, $0C
 EQUB $02, $3F


       Name: inventoryIcon                                           [Show more]
       Type: Variable
   Category: Equipment
    Summary: Image data for the inventory icon shown on the icon bar in the
             Market Price screen
    Context: See this variable on its own page
 References: This variable is used as follows:
             * SendViewToPPU uses inventoryIcon


 You can view the tiles that make up the inventory icon here:

 https://elite.bbcelite.com/images/source/nes/inventoryIcon_ppu.png


.inventoryIcon

 EQUB $00, $00, $00, $06, $0F, $16, $10, $16
 EQUB $00, $00, $06, $1F, $3F, $3F, $3F, $39
 EQUB $00, $00, $00, $00, $00, $80, $80, $80
 EQUB $00, $00, $00, $80, $C0, $40, $40, $40
 EQUB $16, $16, $16, $06, $00, $00, $00, $00
 EQUB $39, $39, $39, $19, $06, $00, $00, $00
 EQUB $80, $80, $80, $00, $00, $00, $00, $00
 EQUB $40, $40, $40, $80, $00, $00, $00, $00


       Name: smallLogoImage                                          [Show more]
       Type: Variable
   Category: Save and load
    Summary: Packed image data for the small Elite logo shown on the Save and
             Load screen
  Deep dive: Image and data compression
    Context: See this variable on its own page
 References: This variable is used as follows:
             * SendViewToPPU uses smallLogoImage


 You can view the tiles that make up the small logo image here:

 https://elite.bbcelite.com/images/source/nes/smallLogoImage_ppu.png

 and you can see what the small logo looks like on-screen here:

 https://elite.bbcelite.com/images/nes/general/save_and_load.png


.smallLogoImage

 EQUB $00, $22, $80, $C0, $E0, $F0, $F8, $A0
 EQUB $80, $40, $22, $20, $10, $32, $08, $04
 EQUB $5E, $0F, $21, $01, $00, $3C, $06, $0C
 EQUB $00, $3C, $06, $CC, $3C, $00, $06, $0A
 EQUB $12, $22, $42, $00, $21, $04, $4C, $3E
 EQUB $1D, $1E, $05, $0F, $02, $13, $01, $33
 EQUB $22, $01, $0A, $00, $1D, $1C, $21, $1E
 EQUB $02, $80, $C0, $A0, $78, $B0, $78, $00
 EQUB $80, $40, $20, $50, $88, $48, $84, $36
 EQUB $02, $01, $01, $0F, $3F, $2F, $7E, $F5
 EQUB $00, $32, $04, $08, $10, $22, $20, $41
 EQUB $8A, $30, $22, $F0, $A0, $40, $A0, $20
 EQUB $00, $21, $08, $02, $40, $80, $40, $22
 EQUB $E0, $10, $00, $21, $08, $00, $21, $04
 EQUB $03, $22, $0F, $22, $07, $31, $03, $23
 EQUB $01, $FA, $71, $37, $36, $3F, $1E, $3B
 EQUB $07, $8F, $02, $81, $22, $C0, $E0, $C4
 EQUB $F8, $70, $02, $80, $C0, $00, $60, $A8
 EQUB $F0, $02, $80, $40, $20, $22, $10, $21
 EQUB $08, $02, $23, $48, $78, $22, $58, $02
 EQUB $40, $02, $22, $20, $00, $3E, $01, $03
 EQUB $0C, $1A, $35, $2A, $35, $4F, $01, $02
 EQUB $06, $0C, $18, $31, $63, $62, $B8, $D8
 EQUB $88, $B0, $00, $22, $C5, $86, $32, $07
 EQUB $27, $77, $4F, $FF, $BF, $21, $3E, $7C
 EQUB $00, $20, $40, $C0, $22, $80, $02, $E0
 EQUB $22, $C0, $22, $80, $03, $21, $01, $07
 EQUB $24, $01, $04, $21, $07, $93, $33, $03
 EQUB $0A, $0A, $40, $43, $00, $F8, $EC, $FC
 EQUB $22, $F5, $FF, $7C, $21, $3D, $C8, $F8
 EQUB $E8, $F8, $E8, $F8, $F1, $20, $24, $08
 EQUB $21, $18, $22, $10, $D0, $58, $10, $58
 EQUB $BC, $22, $30, $4C, $90, $22, $20, $60
 EQUB $40, $02, $21, $02, $68, $72, $58, $60
 EQUB $72, $21, $3B, $10, $32, $0B, $33, $4F
 EQUB $47, $5F, $4F, $67, $35, $2F, $17, $0F
 EQUB $3A, $1E, $5E, $B4, $32, $26, $1C, $10
 EQUB $78, $24, $FE, $22, $FC, $F8, $F0, $03
 EQUB $21, $0B, $00, $32, $05, $02, $04, $21
 EQUB $07, $00, $3E, $03, $01, $00, $02, $17
 EQUB $23, $FA, $03, $8A, $0E, $03, $1D, $08
 EQUB $1B, $FA, $21, $03, $F3, $F2, $32, $03
 EQUB $33, $F8, $F3, $21, $37, $C4, $22, $37
 EQUB $EF, $CC, $00, $E4, $21, $04, $E4, $C4
 EQUB $21, $04, $E7, $B8, $7F, $D7, $B1, $21
 EQUB $21, $B1, $FD, $F1, $21, $03, $00, $31
 EQUB $2F, $24, $21, $A1, $EB, $E0, $CF, $32
 EQUB $08, $0F, $E8, $EB, $21, $1F, $D6, $21
 EQUB $1F, $EF, $35, $08, $0F, $0F, $08, $0F
 EQUB $10, $00, $80, $21, $3F, $00, $BC, $21
 EQUB $01, $00, $22, $E0, $C0, $40, $80, $7F
 EQUB $7E, $22, $80, $36, $1C, $08, $07, $03
 EQUB $00, $01, $00, $7C, $34, $38, $18, $0F
 EQUB $07, $03, $10, $21, $38, $10, $12, $34
 EQUB $0B, $07, $FE, $18, $10, $30, $12, $21
 EQUB $07, $FF, $7F, $32, $0C, $1C, $88, $22
 EQUB $AF, $76, $57, $DB, $22, $0C, $21, $1C
 EQUB $15, $60, $F0, $60, $12, $80, $21, $02
 EQUB $F8, $70, $60, $E0, $12, $00, $22, $FC
 EQUB $F8, $70, $E0, $C0, $80, $03, $7C, $F8
 EQUB $F0, $E0, $C0, $03, $36, $3D, $1F, $07
 EQUB $07, $02, $01, $02, $35, $03, $1F, $0F
 EQUB $01, $03, $03, $AD, $AF, $77, $57, $DA
 EQUB $AC, $F8, $70, $FE, $12, $FC, $FE, $F8
 EQUB $70, $F8, $F0, $E0, $C0, $06, $C0, $80
 EQUB $05, $FC, $02, $30, $50, $03, $F8, $00
 EQUB $20, $60, $20, $05, $10, $22, $30, $20
 EQUB $02, $32, $0E, $1E, $26, $30, $02, $10
 EQUB $22, $30, $20, $02, $22, $3E, $26, $30
 EQUB $02, $10, $22, $30, $20, $02, $28, $30
 EQUB $22, $C0, $10, $22, $30, $20, $02, $22
 EQUB $FE, $26, $30, $08, $32, $1E, $0E, $09
 EQUB $30, $21, $18, $06, $22, $7E, $03, $3F


       Name: logoBallImage                                           [Show more]
       Type: Variable
   Category: Start and end
    Summary: Packed image data for the ball at the bottom of the big Elite logo
             shown on the Start screen
  Deep dive: Image and data compression
    Context: See this variable on its own page
 References: This variable is used as follows:
             * SendViewToPPU uses logoBallImage


 You can view the tiles that make up the big logo ball image here:

 https://elite.bbcelite.com/images/source/nes/logoBallImage_ppu.png

 and you can see what the full big logo looks like on-screen here (the ball is
 at the bottom of the logo):

 https://elite.bbcelite.com/images/nes/general/start.png


.logoBallImage

 EQUB $35, $51, $38, $3F, $11, $0B, $03, $21
 EQUB $0C, $02, $21, $0E, $04, $20, $40, $00
 EQUB $80, $0C, $0D, $13, $3F


       Name: DrawDashNames                                           [Show more]
       Type: Subroutine
   Category: Dashboard
    Summary: Draw the dashboard into both the nametable buffers
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * DrawDashNames_b3 calls DrawDashNames


.DrawDashNames

 LDY #7*32              ; We are about to draw the dashboard, which consists of
                        ; 7 rows of 32 tiles, so set a tile counter in Y to use
                        ; as an index into the dashNames table, so we can copy
                        ; the nametable entries from dashNames into the
                        ; nametable buffer

.ddsh1

 SETUP_PPU_FOR_ICON_BAR ; If the PPU has started drawing the icon bar, configure
                        ; the PPU to use nametable 0 and pattern table 0

 LDA dashNames-1,Y      ; Set A to the Y-th nametable entry in dashNames
                        ;
                        ; Note that we fetch from dashNames-1 as the screen is
                        ; horizontally scrolled by one tile (see below)

 STA nameBuffer0+22*32,Y    ; Store the nametable entry in both nametable
 STA nameBuffer1+22*32,Y    ; buffers, so that the dashboard starts at row 22

 DEY                    ; Decrement the tile counter in Y

 BNE ddsh1              ; Loop back to write the next nametable entry until we
                        ; have written all 7 rows of 32 tiles

                        ; Because the horizontal scroll in PPU_SCROLL is set to
                        ; 8, the leftmost tile on each row is scrolled around to
                        ; the right side, which means that in terms of tiles,
                        ; column 1 is the left edge of the screen, then columns
                        ; 2 to 31 form the body of the screen, and column 0 is
                        ; the right edge of the screen
                        ;
                        ; We therefore have to fix the tiles that appear at the
                        ; end of each row, i.e. column 0 on row 22 (for the end
                        ; of the top row of the dashboard) all the way down to
                        ; column 0 on row 28 (for the end of the bottom row of
                        ; the dashboard)

 LDA nameBuffer0+23*32  ; Wrap around the scrolled tile on row 22
 STA nameBuffer0+22*32

 LDA nameBuffer0+24*32  ; Wrap around the scrolled tile on row 23
 STA nameBuffer0+23*32

 LDA nameBuffer0+25*32  ; Wrap around the scrolled tile on row 24
 STA nameBuffer0+24*32

 LDA nameBuffer0+26*32  ; Wrap around the scrolled tile on row 25
 STA nameBuffer0+25*32

                        ; Interestingly, the scrolled tile on row 26 is omitted,
                        ; though I'm not sure why

 LDA nameBuffer0+28*32  ; Wrap around the scrolled tile on row 27
 STA nameBuffer0+27*32

 LDA nameBuffer0+29*32  ; Wrap around the scrolled tile on row 28
 STA nameBuffer0+28*32

                        ; Finally, we have to clear up the overspill in column 0
                        ; on row 29

 LDA #0                 ; Set the first tile on row 29 to the blank tile
 STA nameBuffer0+29*32

 RTS                    ; Return from the subroutine


       Name: ResetScanner                                            [Show more]
       Type: Subroutine
   Category: Dashboard
    Summary: Reset the sprites used for drawing ships on the scanner
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * ResetScanner_b3 calls ResetScanner


.ResetScanner

 SETUP_PPU_FOR_ICON_BAR ; If the PPU has started drawing the icon bar, configure
                        ; the PPU to use nametable 0 and pattern table 0

                        ; We start by clearing tile rows 29 to 31 in namespace
                        ; buffer 0, which are the three rows just below the
                        ; dashboard

 LDY #3*32              ; Set Y as a tile counter for three rows of 32 tiles

 LDA #0                 ; We are going to set the tiles to the background
                        ; pattern, so set A = 0 to use as the tile number

.rscn1

 STA nameBuffer0+29*32-1,Y      ; Clear the Y-th tile from the start of row 29
                                ; in namespace buffer 0

 DEY                    ; Decrement the tile counter in Y

 BNE rscn1              ; Loop back until we have cleared all three rows

 LDA #203               ; Set the pattern number for sprites 11 and 12 (the
 STA pattSprite11       ; pitch and roll indicators) to 203, which is the I-bar
 STA pattSprite12       ; pattern

 LDA #%00000011         ; Set the attributes for sprites 11 and 12 (the pitch
 STA attrSprite11       ; and roll indicators) as follows:
 STA attrSprite12       ;
                        ;   * Bits 0-1    = sprite palette 3
                        ;   * Bit 5 clear = show in front of background
                        ;   * Bit 6 clear = do not flip horizontally
                        ;   * Bit 7 clear = do not flip vertically

 LDA #%00000000         ; Set the attributes for sprite 13 (the compass dot) as
 STA attrSprite13       ; follows:
                        ;
                        ;   * Bits 0-1    = sprite palette 0
                        ;   * Bit 5 clear = show in front of background
                        ;   * Bit 6 clear = do not flip horizontally
                        ;   * Bit 7 clear = do not flip vertically

                        ; We now reset the 24 sprites from sprite 14 to 37,
                        ; which are the sprites used to show ships on the
                        ; scanner

 LDX #24                ; Set a sprite counter in X so we reset 24 sprites

 LDY #56                ; Set Y = 56 so we start setting the attributes and tile
                        ; for sprite 56 / 4 = 14 onwards

.rscn2

 LDA #218               ; Set the pattern number for sprite Y / 4 to 218, which
 STA pattSprite0,Y      ; is the vertical bar used for drawing a ship's stick
                        ; on the scanner

 LDA #%00000000         ; Set the attributes for sprite Y / 4 as follows:
 STA attrSprite0,Y      ;
                        ;
                        ;   * Bits 0-1    = sprite palette 0
                        ;   * Bit 5 clear = show in front of background
                        ;   * Bit 6 clear = do not flip horizontally
                        ;   * Bit 7 clear = do not flip vertically

 INY                    ; Add 4 to Y so it points to the next sprite's data in
 INY                    ; the sprite buffer
 INY
 INY

 DEX                    ; Decrement the sprite counter in X

 BNE rscn2              ; Loop back until we have reset all 24 sprites

 RTS                    ; Return from the subroutine


       Name: SendViewToPPU                                           [Show more]
       Type: Subroutine
   Category: PPU
    Summary: Configure the PPU for the view type in QQ11
  Deep dive: Views and view types in NES Elite
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * SendViewToPPU_b3 calls SendViewToPPU


.SendViewToPPU

 JSR WaitForNMI         ; Wait until the next NMI interrupt has passed (i.e. the
                        ; next VBlank)

 LDA ppuCtrlCopy        ; Store the value of ppuCtrlCopy on the stack so we can
 PHA                    ; restore it at the end of the subroutine

 LDA #%00000000         ; Set A to use as the new value for PPU_CTRL below

 STA ppuCtrlCopy        ; Store the new value of PPU_CTRL in ppuCtrlCopy so we
                        ; can check its value without having to access the PPU

 STA PPU_CTRL           ; Configure the PPU by setting PPU_CTRL as follows:
                        ;
                        ;   * Bits 0-1    = base nametable address %00 ($2000)
                        ;   * Bit 2 clear = increment PPU_ADDR by 1 each time
                        ;   * Bit 3 clear = sprite pattern table is at $0000
                        ;   * Bit 4 clear = background pattern table is at $0000
                        ;   * Bit 5 clear = sprites are 8x8 pixels
                        ;   * Bit 6 clear = use PPU 0 (the only option on a NES)
                        ;   * Bit 7 clear = disable VBlank NMI generation

 STA setupPPUForIconBar ; Clear bit 7 of setupPPUForIconBar so we do nothing
                        ; when the PPU starts drawing the icon bar

 LDA #%00000000         ; Configure the PPU by setting PPU_MASK as follows:
 STA PPU_MASK           ;
                        ;   * Bit 0 clear = normal colour (not monochrome)
                        ;   * Bit 1 clear = hide leftmost 8 pixels of background
                        ;   * Bit 2 clear = hide sprites in leftmost 8 pixels
                        ;   * Bit 3 clear = hide background
                        ;   * Bit 4 clear = hide sprites
                        ;   * Bit 5 clear = do not intensify greens
                        ;   * Bit 6 clear = do not intensify blues
                        ;   * Bit 7 clear = do not intensify reds

 LDA QQ11               ; If the view type in QQ11 is not $B9 (Equip Ship),
 CMP #$B9               ; jump to svip1 to keep checking for view types
 BNE svip1

 JMP svip7              ; Jump to svip7 to set up the Equip Ship screen

.svip1

 CMP #$9D               ; If the view type in QQ11 is $9D (Long-range Chart with
 BEQ svip6              ; the normal font loaded), jump to svip6

 CMP #$DF               ; If the view type in QQ11 is $DF (Start screen with the
 BEQ svip6              ; normal font loaded), jump to svip6

 CMP #$96               ; If the view type in QQ11 is not $96 (Data on System),
 BNE svip2              ; jump to svip2 to keep checking for view types

                        ; If we get here then this is the Data on System screen

 JSR GetSystemImage_b5  ; This is the Data on System view, so fetch the
                        ; background image and foreground sprite for the current
                        ; system image and send them to the pattern buffers and
                        ; PPU

 JMP svip10             ; Jump to svip10 to finish off setting up the view

.svip2

 CMP #$98               ; If the view type in QQ11 is not $98 (Status Mode),
 BNE svip3              ; jump to svip3 to keep checking for view types

                        ; If we get here then this is the Status Mode screen

 JSR GetCmdrImage_b4    ; This is the Status Mode view, so fetch the headshot
                        ; image for the commander and store it in the pattern
                        ; buffers, and send the face and glasses images to the
                        ; PPU

 JMP svip10             ; Jump to svip10 to finish off setting up the view

.svip3

 CMP #$BA               ; If the view type in QQ11 is not $BA (Market Price),
 BNE svip4              ; jump to svip4 to keep checking for view types

                        ; If we get here then this is the Market Price screen

 LDA #HI(16*69)         ; Set PPU_ADDR to the address of pattern 69 in pattern
 STA PPU_ADDR           ; table 0, so we load the missile image here
 LDA #LO(16*69)
 STA PPU_ADDR

 LDA #HI(inventoryIcon) ; Set SC(1 0) = inventoryIcon so we send the inventory
 STA SC+1               ; icon bar image to the PPU
 LDA #LO(inventoryIcon)
 STA SC

 LDA #245               ; Set imageSentToPPU = 245 to denote that we have sent
 STA imageSentToPPU     ; the inventory icon image to the PPU

 LDX #4                 ; Set X = 4 so we send four batches of 16 bytes to the
                        ; PPU in the call to SendInventoryToPPU below

 JMP svip9              ; Jump to svip9 to send the missile image to the PPU and
                        ; finish off setting up the view

.svip4

 CMP #$BB               ; If the view type in QQ11 is not $BB (Save and load
 BNE svip5              ; with the normal and highlight fonts loaded), jump to
                        ; svip5 to keep checking for view types

                        ; If we get here then this is the Save and Load screen
                        ; with the normal and highlight fonts loaded

 LDA #HI(16*69)         ; Set PPU_ADDR to the address of pattern 69 in pattern
 STA PPU_ADDR           ; table 0, so we load the small logo image here
 LDA #LO(16*69)
 STA PPU_ADDR

 LDA #HI(smallLogoImage)    ; Set V(1 0) = smallLogoImage
 STA V+1                    ;
 LDA #LO(smallLogoImage)    ; So we can unpack the image data for the small
 STA V                      ; Elite logo into pattern 69 onwards in pattern
                            ; table 0

 LDA #3                 ; Set A = 3 so we only unpack the image data below when
                        ; imageSentToPPU does not equal 3 (i.e. if we haven't
                        ; already sent the small logo image to the PPU)

 BNE svip8              ; Jump to svip8 to unpack the image data (this BNE is
                        ; effectively a JMP as A is never zero)

.svip5

                        ; If we get here then this not one of these views:
                        ;
                        ;   * Equip Ship
                        ;   * Long-range Chart with the normal font loaded
                        ;   * Start screen with the normal font loaded
                        ;   * Data on System
                        ;   * Status Mode
                        ;   * Market Price
                        ;   * Save and load with normal and highlight fonts
                        ;     loaded
                        ;
                        ; so now we load the dashboard image, if we haven't
                        ; already

 LDA #0                 ; Set A = 0 to set as the new value of imageSentToPPU
                        ; below

 CMP imageSentToPPU     ; If imageSentToPPU = 0 then we have already sent the
 BEQ svip10             ; dashboard image to the PPU, so jump to svip10 to
                        ; finish off setting up the view without sending the
                        ; dashboard image again

 STA imageSentToPPU     ; Set imageSentToPPU = 0 to denote that we have sent the
                        ; dashboard image to the PPU

 JSR SendDashImageToPPU ; Unpack the dashboard image and send it to patterns 69
                        ; to 255 in pattern table 0 in the PPU

 JMP svip10             ; Jump to svip10 to finish off setting up the view

.svip6

                        ; If we get here then QQ11 is $9D (Long-range Chart with
                        ; the normal font loaded) or $DF (Start screen with
                        ; the normal font loaded), so now we load the font
                        ; images, starting at pattern 68 in the PPU

 LDA #36                ; Set asciiToPattern = 36, so we add 36 to an ASCII code
 STA asciiToPattern     ; in the CHPR routine to get the pattern number in the
                        ; PPU of the corresponding character image (as we are
                        ; about to load the font at pattern 68, and the font
                        ; starts with a space character, which is ASCII 32, and
                        ; 32 + 36 = 68)

 LDA #1                 ; Set A = 1 to set as the new value of imageSentToPPU
                        ; below

 CMP imageSentToPPU     ; If imageSentToPPU = 1 then we have already sent the
 BEQ svip10             ; font image to the PPU, so jump to svip10 to finish off
                        ; setting up the view without sending the font image
                        ; again

 STA imageSentToPPU     ; Set imageSentToPPU = 1 to denote that we have sent the
                        ; font image to the PPU

 LDA #HI(16*68)         ; Set PPU_ADDR to the address of pattern 68 in pattern
 STA PPU_ADDR           ; table 0
 LDA #LO(16*68)
 STA PPU_ADDR

 LDX #95                ; Set X = 95 so the call to SendFontImageToPPU sends 95
                        ; font patterns to the PPU as a colour 1 font on a black
                        ; background (though the 95th character is full of
                        ; random junk, so it never gets used)

 LDA #HI(fontImage)     ; Set SC(1 0) = fontImage so we send the font image in
 STA SC+1               ; the call to SendFontImageToPPU
 LDA #LO(fontImage)
 STA SC

 JSR SendFontImageToPPU ; Send the 95 font patterns to the PPU as a colour 1
                        ; font on a black background

 LDA QQ11               ; If the view type in QQ11 is not $DF (Start screen with
 CMP #$DF               ; the normal font loaded), then jump to svip10 to
 BNE svip10             ; finish off setting up the view without loading the
                        ; logo ball image

 LDA #HI(16*227)        ; Set PPU_ADDR to the address of pattern 227 in pattern
 STA PPU_ADDR           ; table 0
 LDA #LO(16*227)
 STA PPU_ADDR

 LDA #HI(logoBallImage) ; Set V(1 0) = logoBallImage
 STA V+1                ;
 LDA #LO(logoBallImage) ; So we can unpack the image data for the ball at the
 STA V                  ; bottom of the big Elite logo into pattern 227 onwards
                        ; in pattern table 0

 JSR UnpackToPPU        ; Unpack the image data to the PPU

 JMP svip10             ; Jump to svip10 to finish off setting up the view

.svip7

                        ; If we get here then this is the Equip Ship screen

 LDA #HI(16*69)         ; Set PPU_ADDR to the address of pattern 69 in pattern
 STA PPU_ADDR           ; table 0
 LDA #LO(16*69)
 STA PPU_ADDR

 LDA #HI(cobraImage)    ; Set V(1 0) = cobraImage
 STA V+1                ;
 LDA #LO(cobraImage)    ; So we can unpack the image data for the Cobra Mk III
 STA V                  ; image into pattern 69 onwards in pattern table 0

 LDA #2                 ; Set A = 2 so we only unpack the image data when
                        ; imageSentToPPU does not equal 2, i.e. if we have not
                        ; already sent the Cobra image to the PPU

.svip8

                        ; If we get here then A determines which image we should
                        ; be loading (the Cobra Mk III image when A = 2, or the
                        ; small logo image when A = 3)

 CMP imageSentToPPU     ; If imageSentToPPU = A then we have already sent the
 BEQ svip10             ; image specified in A to the PPU

 STA imageSentToPPU     ; Set imageSentToPPU = A to denote that we have sent the
                        ; relevant image to the PPU

 JSR UnpackToPPU        ; Unpack the image data to the PPU

 JMP svip10             ; Jump to svip10 to finish off setting up the view

.svip9

 JSR SendInventoryToPPU ; Send X batches of 16 bytes from SC(1 0) to the PPU
                        ;
                        ; We only get here with the following values:
                        ;
                        ;   SC(1 0) = inventoryIcon
                        ;
                        ;   X = 4
                        ;
                        ; So this sends 16 * 4 = 64 bytes from inventoryIcon to
                        ; the PPU, which sends the inventory icon bar image

.svip10

                        ; We have finished setting up any view-specific images
                        ; and settings, so now we finish off with some settings
                        ; that apply to all views

 JSR SetupSprite0       ; Set the coordinates of sprite 0 so we can detect when
                        ; the PPU starts to draw the icon bar

                        ; We now send patterns 0 to 4 to the PPU, which contain
                        ; the box edges

 LDA #HI(PPU_PATT_1+16*0)   ; Set PPU_ADDR to the address of pattern 0 in
 STA PPU_ADDR               ; pattern table 1
 LDA #LO(PPU_PATT_1+16*0)
 STA PPU_ADDR

 LDY #0                 ; We are about to send a batch of bytes to the PPU, so
                        ; set an index counter in Y

 LDX #80                ; There are 80 bytes of pattern data in the five tile
                        ; patterns (5 * 16 bytes), so set a byte counter in X

.svip11

 LDA boxEdgeImages,Y    ; Send the Y-th byte from boxEdgeImages to the PPU
 STA PPU_DATA

 INY                    ; Increment the index counter in Y

 DEX                    ; Decrement the byte counter in X

 BNE svip11             ; Loop back until we have sent all 80 bytes to the PPU

                        ; We now zero pattern 255 in pattern table 1 so it is
                        ; a full block of background colour

 LDA #HI(PPU_PATT_1+16*255) ; Set PPU_ADDR to the address of pattern 255 in
 STA PPU_ADDR               ; pattern table 1
 LDA #LO(PPU_PATT_1+16*255)
 STA PPU_ADDR

 LDA #0                 ; We are going to zero the pattern, so set A = 0 to send
                        ; to the PPU

 LDX #16                ; There are 16 bytes in a pattern, so set a byte counter
                        ; in X

.svip12

 STA PPU_DATA           ; Send a zero to the PPU

 DEX                    ; Decrement the byte counter in X

 BNE svip12             ; Loop back until we have sent all 16 zeroes to the PPU

 JSR MakeSoundsAtVBlank ; Wait for the next VBlank and make the current sounds
                        ; (music and sound effects)

 LDX #0                 ; Configure bitplane 0 to be sent to the PPU in the NMI,
 JSR SendBitplaneToPPU  ; so the patterns and nametables will be sent to the PPU
                        ; during the next few VBlanks

 LDX #1                 ; Configure bitplane 1 to be sent to the PPU in the NMI
 JSR SendBitplaneToPPU  ; so the patterns and nametables will be sent to the PPU
                        ; during the next few VBlanks

 LDX #0                 ; Hide bitplane 0, so:
 STX hiddenBitplane     ;
                        ;   * Colour %01 (1) is the hidden colour (black)
                        ;   * Colour %10 (2) is the visible colour (cyan)

 STX nmiBitplane        ; Set nmiBitplane = 0 so bitplane 0 is the first to be
                        ; sent in the NMI handler

 JSR SetDrawingBitplane ; Set the drawing bitplane to bitplane 0

 JSR MakeSoundsAtVBlank ; Wait for the next VBlank and make the current sounds
                        ; (music and sound effects)

 LDA QQ11               ; Set the old view type in QQ11a to the new view type in
 STA QQ11a              ; QQ11, to denote that we have now changed view to the
                        ; view in QQ11

 AND #%01000000         ; If bit 6 of the view type is clear, then there is an
 BEQ svip13             ; icon bar, so jump to svip13 to set showUserInterface
                        ; to denote there is a user interface

 LDA QQ11               ; If the view type in QQ11 is $DF (Start screen with
 CMP #$DF               ; the normal font loaded), jump to svip13 to set bit 7
 BEQ svip13             ; of showUserInterface so that the nametable and palette
                        ; table get set to 0 when sprite 0 is drawn, even though
                        ; there is no icon bar (this ensures that the part of
                        ; the Start screen below x-coordinate 166 is always
                        ; drawn using nametable 0, which covers the interface
                        ; part of the screen where the language gets chosen)

                        ; If we get here then there is no user interface and
                        ; and this is not the Start screen with the normal font
                        ; loaded

 LDA #0                 ; Clear bit 7 of A so we can set showUserInterface to
 BEQ svip14             ; denote that there is no user interface, and jump
                        ; to svip14 to set the value (this BEQ is effectively
                        ; a JMP as A is always zero)

.svip13

 LDA #%10000000         ; Set bit 7 of A so we can set showUserInterface to
                        ; denote that there is a user interface

.svip14

 STA showUserInterface  ; Set showUserInterface to the value of A that we just
                        ; set for the view

 PLA                    ; Restore the copy of ppuCtrlCopy that we put on the
 STA ppuCtrlCopy        ; stack so it's preserved across the call to the
                        ; subroutine

 STA PPU_CTRL           ; Set PPU_CTRL to the copy we made, so it's also
                        ; preserved across the call

 JMP FadeToColour_b3    ; Reverse-fade the screen from black to full colour over
                        ; the next four VBlanks, returning from the subroutine
                        ; using a tail call


       Name: SendFontImageToPPU                                      [Show more]
       Type: Subroutine
   Category: PPU
    Summary: Send a font to the PPU as a colour 1 font on a colour 0 background
             (i.e. colour 1 on black)
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * SendViewToPPU calls SendFontImageToPPU


 Arguments:

   X                    The number of patterns to send to the PPU

   SC(1 0)              The address of the data in the pattern buffer to send to
                        the PPU


.SendFontImageToPPU

 LDY #0                 ; We are about to send a batch of bytes to the PPU, so
                        ; set an index counter in Y

.sppu1

                        ; We repeat the following code eight times, so it sends
                        ; all eight bytes of the pattern into bitplane 0 to the
                        ; PPU
                        ;
                        ; Bitplane 0 is used for bit 0 of the colour number, and
                        ; we send zeroes to bitplane 1 below, which is used for
                        ; bit 1 of the colour number, so the result is a pattern
                        ; with the font in colour 1 on background colour 0

 LDA (SC),Y             ; Send the Y-th byte of SC(1 0) to the PPU and increment
 STA PPU_DATA           ; the index in Y
 INY

 LDA (SC),Y             ; Send the Y-th byte of SC(1 0) to the PPU and increment
 STA PPU_DATA           ; the index in Y
 INY

 LDA (SC),Y             ; Send the Y-th byte of SC(1 0) to the PPU and increment
 STA PPU_DATA           ; the index in Y
 INY

 LDA (SC),Y             ; Send the Y-th byte of SC(1 0) to the PPU and increment
 STA PPU_DATA           ; the index in Y
 INY

 LDA (SC),Y             ; Send the Y-th byte of SC(1 0) to the PPU and increment
 STA PPU_DATA           ; the index in Y
 INY

 LDA (SC),Y             ; Send the Y-th byte of SC(1 0) to the PPU and increment
 STA PPU_DATA           ; the index in Y
 INY

 LDA (SC),Y             ; Send the Y-th byte of SC(1 0) to the PPU and increment
 STA PPU_DATA           ; the index in Y
 INY

 LDA (SC),Y             ; Send the Y-th byte of SC(1 0) to the PPU and increment
 STA PPU_DATA           ; the index in Y
 INY

 BNE sppu2              ; If Y just wrapped around to zero, increment the high
 INC SC+1               ; byte of SC(1 0) to point to the next page in memory

.sppu2

 LDA #0                 ; Send the pattern's second bitplane to the PPU, so all
 STA PPU_DATA           ; eight bytes of the pattern in bitplane 1 are set to
 STA PPU_DATA           ; zero (so bit 1 of the colour number is zero)
 STA PPU_DATA
 STA PPU_DATA
 STA PPU_DATA
 STA PPU_DATA
 STA PPU_DATA
 STA PPU_DATA

 DEX                    ; Decrement the pattern counter in X

 BNE sppu1              ; Loop back to send the next pattern to the PPU until we
                        ; have sent X patterns

 RTS                    ; Return from the subroutine


       Name: SendDashImageToPPU                                      [Show more]
       Type: Subroutine
   Category: PPU
    Summary: Unpack the dashboard image and send it to patterns 69 to 255 in
             pattern table 0 in the PPU
  Deep dive: Views and view types in NES Elite
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * ResetScreen calls SendDashImageToPPU
             * SendViewToPPU calls SendDashImageToPPU


.SendDashImageToPPU

 LDA #HI(16*69)         ; Set PPU_ADDR to the address of pattern 69 in pattern
 STA PPU_ADDR           ; table 0
 LDA #LO(16*69)
 STA PPU_ADDR

 LDA #HI(dashImage)     ; Set V(1 0) = dashImage
 STA V+1                ;
 LDA #LO(dashImage)     ; So we can unpack the image data for the dashboard into
 STA V                  ; into patterns 69 to 255 in pattern table 0

 JMP UnpackToPPU        ; Unpack the image data to the PPU, returning from the
                        ; subroutine using a tail call


       Name: SendBitplaneToPPU                                       [Show more]
       Type: Subroutine
   Category: PPU
    Summary: Send a bitplane to the PPU immediately
  Deep dive: Views and view types in NES Elite
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * SendBitplaneToPPU_b3 calls SendBitplaneToPPU
             * SendViewToPPU calls SendBitplaneToPPU


 Arguments:

   X                    The number of the bitplane to configure to be sent to
                        the PPU in the NMI handler


.SendBitplaneToPPU

 STX drawingBitplane    ; Set the drawing bitplane and the NMI bitplane to the
 STX nmiBitplane        ; argument in X, so all the following operations apply
                        ; to the specified bitplane

 STX hiddenBitplane     ; Hide bitplane X so it isn't visible on-screen while
                        ; we do the following

 LDA #0                 ; Tell the NMI handler to send nametable entries from
 STA firstNameTile      ; tile 0 onwards

 LDA QQ11               ; If the view type in QQ11 is not $DF (Start screen with
 CMP #$DF               ; the normal font loaded), then jump to sbit1 to skip
 BNE sbit1              ; the following and start sending pattern data from
                        ; pattern 37 onwards

 LDA #4                 ; This is the Start screen with font loaded in bitplane
 BNE sbit2              ; 0, so set A = 4 so we start sending pattern data
                        ; from pattern 4 onwards

.sbit1

 LDA #37                ; So set A = 37 so we start sending pattern data from
                        ; pattern 37 onwards

.sbit2

 STA firstPattern       ; Tell the NMI handler to send pattern entries from
                        ; pattern A in the buffer

 LDA firstFreePattern   ; Tell the NMI handler to send pattern entries up to the
 STA lastPattern,X      ; first free pattern, for the drawing bitplane in X

 LDA #%11000100         ; Set the bitplane flags for the drawing bitplane to the
 JSR SetDrawPlaneFlags  ; following:
                        ;
                        ;   * Bit 2 set   = send tiles up to end of the buffer
                        ;   * Bit 3 clear = don't clear buffers after sending
                        ;   * Bit 4 clear = we've not started sending data yet
                        ;   * Bit 5 clear = we have not yet sent all the data
                        ;   * Bit 6 set   = send both pattern and nametable data
                        ;   * Bit 7 set   = send data to the PPU
                        ;
                        ; Bits 0 and 1 are ignored and are always clear
                        ;
                        ; This configures the NMI to send nametable and pattern
                        ; data for the drawing bitplane to the PPU during VBlank

 JSR SendDataNowToPPU   ; Send the drawing bitplane buffers to the PPU
                        ; immediately, without trying to squeeze it into VBlanks

 LDA firstFreePattern   ; Set clearingPattern for the drawing bitplane to the
 STA clearingPattern,X  ; number of the first free pattern, so the NMI handler
                        ; only clears patterns from this point onwards
                        ;
                        ; This ensures that the tiles that we just sent to the
                        ; PPU don't get cleared out by the NMI handler

 RTS                    ; Return from the subroutine


       Name: SendDataNowToPPU                                        [Show more]
       Type: Subroutine
   Category: PPU
    Summary: Send the specified bitplane buffers to the PPU immediately,
             without trying to squeeze it into VBlanks
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * SendBitplaneToPPU calls SendDataNowToPPU


 Arguments:

   X                    The number of the bitplane to send


 Returns:

   X                    X is preserved


.SendDataNowToPPU

 TXA                    ; Store the bitplane in X on the stack
 PHA

 LDA #HI(16383)         ; Set cycleCount = 16383 so the call to SendBuffersToPPU
 STA cycleCount+1       ; runs for as long as possible without quitting early
 LDA #LO(16383)         ; (we are not in the NMI handler, so we don't need to
 STA cycleCount         ; count cycles, so this just ensures that the
                        ; cycle-counting checks are not triggered where
                        ; possible)

 JSR SendBuffersToPPU   ; Send the nametable and palette buffers to the PPU for
                        ; bitplane X, as configured in the bitplane flags

 PLA                    ; Set X to the bitplane number we stored on the stack
 PHA                    ; above, leaving the value on the stack so we can still
 TAX                    ; restore it at the end of the routine

 LDA bitplaneFlags,X    ; If bit 5 is set in the flags for bitplane X, then we
 AND #%00100000         ; have now sent all the data to the PPU for this
 BNE sdat1              ; bitplane, so jump to sdat1 to return from the
                        ; subroutine

 LDA #HI(4096)          ; Otherwise the large cycle count above wasn't long
 STA cycleCount+1       ; enough to send all the data to the PPU, so set
 LDA #LO(4096)          ; cycleCount to 4096 to have another go
 STA cycleCount

 JSR SendBuffersToPPU   ; Send the nametable and palette buffers to the PPU for
                        ; bitplane X, as configured in the bitplane flags

 PLA                    ; Retrieve the bitplane number from the stack
 TAX

 LDA bitplaneFlags,X    ; If bit 5 is set in the flags for bitplane X, then we
 AND #%00100000         ; have now sent all the data to the PPU for this
 BNE sdat2              ; bitplane, so jump to sdat2 to return from the
                        ; subroutine

                        ; Otherwise we still haven't sent all the data to the
                        ; PPU, so we play the background music and repeat the
                        ; above

 JSR MakeSoundsAtVBlank ; Wait for the next VBlank and make the current sounds
                        ; (music and sound effects)

 JMP SendDataNowToPPU   ; Loop back to keep sending data to the PPU

.sdat1

 PLA                    ; Retrieve the bitplane number from the stack
 TAX

.sdat2

 JMP MakeSoundsAtVBlank ; Wait for the next VBlank and make the current sounds
                        ; (music and sound effects), returning from the
                        ; subroutine using a tail call


       Name: SetupViewInNMI                                          [Show more]
       Type: Subroutine
   Category: Drawing the screen
    Summary: Setup the view and configure the NMI to send both bitplanes to the
             PPU during VBlank
  Deep dive: Views and view types in NES Elite
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * SetupViewInNMI_b3 calls SetupViewInNMI


 This routine is only ever called with the following bitplane flags in A:

   * Bit 2 clear = send tiles up to configured numbers
   * Bit 3 clear = don't clear buffers after sending
   * Bit 4 clear = we've not started sending data yet
   * Bit 5 clear = we have not yet sent all the data
   * Bit 6 set   = send both pattern and nametable data
   * Bit 7 set   = send data to the PPU

 Bits 0 and 1 are ignored and are always clear.

 This routine therefore configures the NMI to send both bitplanes to the PPU.


 Arguments:

   A                    The bitplane flags to set for the drawing bitplane


.SetupViewInNMI

 PHA                    ; Store the bitplane flags on the stack so we can
                        ; retrieve them later

 JSR WaitForPPUToFinish ; Wait until both bitplanes of the screen have been
                        ; sent to the PPU, so the screen is fully updated and
                        ; there is no more data waiting to be sent to the PPU

 LDA QQ11               ; If the view type in QQ11 is not $96 (Data on System),
 CMP #$96               ; jump to svin1 to keep checking for view types
 BNE svin1

                        ; If we get here then this is the Data on System screen

 JSR GetSystemBack_b5   ; Fetch the background image for the current system and
                        ; store it in the pattern buffers

 JMP svin2              ; Jump to svin2 to continue setting up the view

.svin1

 CMP #$98               ; If the view type in QQ11 is not $98 (Status Mode),
 BNE svin2              ; jump to svin2 to keep checking for view types

                        ; If we get here then this is the Status Mode screen

 JSR GetHeadshot_b4     ; Fetch the headshot image for the commander and store
                        ; it in the pattern buffers, starting at pattern number
                        ; picturePattern

.svin2

 LDA QQ11               ; If bit 6 of the view type is clear, then there is an
 AND #%01000000         ; icon bar, so jump to svin3 to skip the following
 BEQ svin3              ; instruction

 LDA #0                 ; There is no icon bar, so set showUserInterface to 0 to
 STA showUserInterface  ; indicate that there is no user interface

.svin3

 JSR SetupSprite0       ; Set the coordinates of sprite 0 so we can detect when
                        ; the PPU starts to draw the icon bar

 LDA #0                 ; Tell the NMI handler to send nametable entries from
 STA firstNameTile      ; tile 0 onwards

 LDA #37                ; Tell the NMI handler to send pattern entries from
 STA firstPattern       ; pattern 37 in the buffer

 LDA firstFreePattern   ; Tell the NMI handler to send pattern entries up to the
 STA lastPattern        ; first free pattern, for both bitplanes
 STA lastPattern+1

 LDA #%01010100         ; This instruction has no effect as we are about to pull
                        ; the value of A from the stack

 LDX #0                 ; This instruction has no effect as the call to
                        ; SetDrawPlaneFlags overwrites X with the value of the
                        ; drawing bitplane, though this could be remnants of
                        ; code to set the drawing bitplane to 0, as the
                        ; following code depends on this being the case

 PLA                    ; Retrieve the bitplane flags that were passed to this
                        ; routine and which we stored on the stack above

 JSR SetDrawPlaneFlags  ; Set the bitplane flags to A for the current drawing
                        ; bitplane, which must be bitplane 0 at this point
                        ; (though it is not entirely obvious why this is the
                        ; case)

 INC drawingBitplane    ; Increment drawingBitplane to 1

 JSR SetDrawPlaneFlags  ; Set the bitplane flags to A for bitplane 1

 JSR WaitForPPUToFinish ; Wait until both bitplanes of the screen have been
                        ; sent to the PPU, so the screen is fully updated and
                        ; there is no more data waiting to be sent to the PPU

 LDA #80                ; Tell the PPU to send nametable entries up to tile
 STA lastNameTile       ; 80 * 8 = 640 (i.e. to the end of tile row 19) in both
 STA lastNameTile+1     ; bitplanes

 LDA QQ11               ; Set the old view type in QQ11a to the new view type
 STA QQ11a              ; in QQ11, to denote that we have now changed view to
                        ; the view in QQ11

 LDA firstFreePattern   ; Set clearingPattern for both bitplanes to the number
 STA clearingPattern    ; of the first free pattern, so the NMI handler only
 STA clearingPattern+1  ; clears patterns from this point onwards
                        ;
                        ; This ensures that the tiles that have already been
                        ; sent to the PPU above don't get cleared out by the NMI
                        ; handler

 LDA #0                 ; Set A = 0, though this has no effect as we don't use
                        ; it

 LDX #0                 ; Hide bitplane 0, so:
 STX hiddenBitplane     ;
                        ;   * Colour %01 (1) is the hidden colour (black)
                        ;   * Colour %10 (2) is the visible colour (cyan)

 STX nmiBitplane        ; Set nmiBitplane = 0 so bitplane 0 is the first to be
                        ; sent in the NMI handler

 JSR SetDrawingBitplane ; Set the drawing bitplane to bitplane 0

 LDA QQ11               ; If bit 6 of the view type is set, then there is no
 AND #%01000000         ; icon bar, so jump to svin4 to skip the following
 BNE svin4              ; instructions

 JSR WaitForNMI         ; Wait until the next NMI interrupt has passed (i.e. the
                        ; next VBlank)

 LDA #%10000000         ; Set bit 7 of showUserInterface to denote that there is
 STA showUserInterface  ; a user interface

.svin4

 LDA screenFadedToBlack ; If bit 7 of screenFadedToBlack is clear then the
 BPL svin5              ; screen is visible and has not been faded to black, so
                        ; jump to svin5 to update the screen without fading it

 JMP FadeToColour_b3    ; Reverse-fade the screen from black to full colour over
                        ; the next four VBlanks, returning from the subroutine
                        ; using a tail call

.svin5

 LDA QQ11               ; Set X to the new view type in the low nibble of QQ11
 AND #%00001111
 TAX

 LDA paletteForView,X   ; Set A to the palette number used by the view from the
 CMP screenReset        ; paletteForView table, compare it to screenReset, set
 STA screenReset        ; the processor flags accordingly, and store the palette
                        ; number in screenReset
                        ;
                        ; This has no effect, as screenReset is not read
                        ; anywhere and neither the value of A nor the processor
                        ; flags are used in the following

 JSR GetViewPalettes    ; Get the palette for the view type in QQ11a and store
                        ; it in a table at XX3

 DEC updatePaletteInNMI ; Decrement updatePaletteInNMI to a non-zero value so we
                        ; do send palette data from XX3 to the PPU during NMI,
                        ; which will ensure the screen updates with the colours
                        ; as we fade to black

 JSR WaitForNMI         ; Wait until the next NMI interrupt has passed (i.e. the
                        ; next VBlank) so we know the palette data has been sent
                        ; to the PPU

 INC updatePaletteInNMI ; Increment updatePaletteInNMI back to the value it had
                        ; before we decremented it above

 RTS                    ; Return from the subroutine


       Name: paletteForView                                          [Show more]
       Type: Variable
   Category: Drawing the screen
    Summary: Palette numbers for each view
    Context: See this variable on its own page
 References: This variable is used as follows:
             * GetViewPalettes uses paletteForView
             * SetupViewInNMI uses paletteForView


 These palette numbers refer to the palettes in the viewPalettes table.


.paletteForView

 EQUB  0                ; Space view
 EQUB  2                ; Title screen
 EQUB 10                ; Mission 1 briefing: rotating ship
 EQUB 10                ; Mission 1 briefing: ship and text
 EQUB  0                ; Game Over screen
 EQUB 10                ; Text-based mission briefing
 EQUB  6                ; Data on System
 EQUB  8                ; Inventory
 EQUB  8                ; Status Mode
 EQUB  5                ; Equip Ship
 EQUB  1                ; Market Price
 EQUB  7                ; Save and load
 EQUB  3                ; Short-range Chart
 EQUB  4                ; Long-range Chart
 EQUB  0                ; Unused
 EQUB  9                ; Start screen


       Name: boxEdgeImages                                           [Show more]
       Type: Variable
   Category: Drawing the screen
    Summary: Image data for patterns 0 to 4
    Context: See this variable on its own page
 References: This variable is used as follows:
             * ResetScreen uses boxEdgeImages
             * SendViewToPPU uses boxEdgeImages


 This table contains image data for patterns 0 to 4, which are as follows:

   * 0 is the blank tile (all black)

   * 1 contains a vertical bar down the right edge of the pattern (for the
     left box edge)

   * 2 contains a vertical bar down the left edge of the pattern (for the
     right box edge)

   * 3 contains a horizontal bar along the lower-middle of the pattern (for the
     top box edge)

   * 4 contains the first pattern for the top-left corner of the icon bar


.boxEdgeImages

 EQUB $00, $00, $00, $00
 EQUB $00, $00, $00, $00
 EQUB $00, $00, $00, $00
 EQUB $00, $00, $00, $00

 EQUB $00, $00, $00, $00
 EQUB $00, $00, $00, $00
 EQUB $03, $03, $03, $03
 EQUB $03, $03, $03, $03

 EQUB $00, $00, $00, $00
 EQUB $00, $00, $00, $00
 EQUB $C0, $C0, $C0, $C0
 EQUB $C0, $C0, $C0, $C0

 EQUB $00, $00, $00, $00
 EQUB $00, $00, $00, $00
 EQUB $00, $00, $00, $FF
 EQUB $FF, $FF, $00, $00

 EQUB $00, $00, $00, $00
 EQUB $00, $00, $00, $00
 EQUB $0F, $1F, $1F, $DF
 EQUB $DF, $BF, $BF, $BF


       Name: ResetScreen                                             [Show more]
       Type: Subroutine
   Category: Start and end
    Summary: Reset the screen by clearing down the PPU, setting all colours to
             black, and resetting the screen-related variables
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * ResetScreen_b3 calls ResetScreen


.ResetScreen

 JSR WaitFor3xVBlank    ; Wait for three VBlanks to pass

 LDA #HI(20*32)         ; Set iconBarRow(1 0) = 20*32
 STA iconBarRow+1       ;
 LDA #LO(20*32)         ; So the icon bar is on row 20
 STA iconBarRow

                        ; We now want to set all the colours in all the palettes
                        ; to black, to hide anything that's on-screen

 LDA #$3F               ; Set PPU_ADDR = $3F00, so it points to the background
 STA PPU_ADDR           ; colour palette entry in the PPU
 LDA #$00
 STA PPU_ADDR

 LDA #$0F               ; Set A to $0F, which is the HSV value for black

 LDX #31                ; There are 32 bytes in the background and sprite
                        ; palettes in the PPU, so set a loop counter in X to
                        ; count through them all

.rscr1

 STA PPU_DATA           ; Send A to the PPU to set palette entry X to black

 DEX                    ; Decrement the loop counter

 BPL rscr1              ; Loop back until we have set all the palette entries to
                        ; black

                        ; We now want to reset both PPU nametables to show blank
                        ; tiles (i.e. tile 0), so nothing is shown on-screen
                        ;
                        ; The two nametables and associated attribute tables are
                        ; structured like this in the PPU:
                        ;
                        ;   * PPU_NAME_0 ($2000 to $23BF)
                        ;   * PPU_ATTR_0 ($23C0 to $23FF)
                        ;   * PPU_NAME_1 ($2400 to $27BF)
                        ;   * PPU_ATTR_1 ($27C0 to $27FF)
                        ;
                        ; Each nametable/attribute table consists of 1024 bytes
                        ; (i.e. four pages of 256 bytes), and because the tables
                        ; are consecutive in PPU memory, we can zero the whole
                        ; lot by sending eight pages of zeroes to the PPU,
                        ; tarting at the start of nametable 0 at PPU_NAME_0

 LDA #HI(PPU_NAME_0)    ; Set PPU_ADDR to PPU_NAME_0, so it points to nametable
 STA PPU_ADDR           ; 0 in the PPU
 LDA #LO(PPU_NAME_0)
 STA PPU_ADDR

 LDA #0                 ; Set A = 0 so we can send it to the PPU to fill both
                        ; PPU nametables with blank tiles

 LDX #8                 ; We want to zero 8 pages of 256 bytes, so set a page
                        ; counter in X

 LDY #0                 ; Set Y as a byte counter to count through each of the
                        ; 256 bytes in a page of memory

.rscr2

 STA PPU_DATA           ; Zero the next entry in the nametable

 DEY                    ; Decrement the byte counter

 BNE rscr2              ; Loop back until we have zeroed a whole page

 JSR WaitFor3xVBlank    ; Wait for three VBlanks to pass

 LDA #0                 ; Set A = 0 again, as it gets changed by WaitFor3xVBlank

 DEX                    ; Decrement the page counter

 BNE rscr2              ; Loop back until we have zeroed 8 pages of nametable in
                        ; the PPU

 LDA #245               ; Set screenReset = 245, though this is not used
 STA screenReset        ; anywhere, so this has no effect on anything

 STA imageSentToPPU     ; Set imageSentToPPU = 245 to denote that we have sent
                        ; the inventory icon image to the PPU

                        ; We now send patterns 0 to 4 to the PPU, to set up the
                        ; blank tile (pattern 0), the three box edges (patterns
                        ; 1 to 3) and the top-left corner of the icon bar
                        ; (pattern 4)
                        ;
                        ; We do this for both pattern tables

 LDA #HI(PPU_PATT_0)    ; Set PPU_ADDR to PPU_PATT_0, so it points to pattern
 STA PPU_ADDR           ; table 0 in the PPU
 LDA #LO(PPU_PATT_0)
 STA PPU_ADDR

 LDY #0                 ; Set Y to use as an index counter as we work through
                        ; the boxEdgeImages table and send its data to the PPU

 LDX #80                ; The boxEdgeImages table contains five patterns with 16
                        ; bytes per pattern, so that's a total of 80 bytes to
                        ; send to the PPU, so set X as a byte counter

.rscr3

 LDA boxEdgeImages,Y    ; Send the Y-th entry from the boxEdgeImages table to
 STA PPU_DATA           ; the PPU

 INY                    ; Increment the index into the boxEdgeImages table to
                        ; point at the next byte

 DEX                    ; Decrement the byte counter

 BNE rscr3              ; Loop back until we have sent all 80 bytes to the PPU

 LDA #HI(PPU_PATT_1)    ; Set PPU_ADDR to PPU_PATT_1, so it points to pattern
 STA PPU_ADDR           ; table 1 in the PPU
 LDA #LO(PPU_PATT_1)
 STA PPU_ADDR

 LDY #0                 ; Set Y to use as an index counter as we work through
                        ; the boxEdgeImages table and send its data to the PPU

 LDX #80                ; The boxEdgeImages table contains five patterns with 16
                        ; bytes per pattern, so that's a total of 80 bytes to
                        ; send to the PPU, so set X as a byte counter

.rscr4

 LDA boxEdgeImages,Y    ; Send the Y-th entry from the boxEdgeImages table to
 STA PPU_DATA           ; the PPU

 INY                    ; Increment the index into the boxEdgeImages table to
                        ; point at the next byte

 DEX                    ; Decrement the byte counter

 BNE rscr4              ; Loop back until we have sent all 80 bytes to the PPU

                        ; We now reset the sprite buffer by setting all 64
                        ; sprites as follows:
                        ;
                        ;   * Set the coordinates to (0, 240), which is just
                        ;     below the bottom of the screen, so the sprite is
                        ;     hidden from view
                        ;
                        ;   * Set the pattern number to 254 (this value seems to
                        ;     be arbitrary, but is possibly 254 so that sprite 0
                        ;     keeps using pattern 254 throughout the reset)
                        ;
                        ;   * Set the attributes so the sprite uses palette 3,
                        ;     is shown in front of the background, and is not
                        ;     flipped in either direction

 LDY #0                 ; We are about to loop through the sprite buffer, so set
                        ; a byte index in Y

.rscr5

 LDA #240               ; Set the y-coordinate for this sprite to 240, to move
 STA ySprite0,Y         ; it off the bottom of the screen

 INY                    ; Increment Y to point to the second byte for this
                        ; sprite, i.e. pattSprite0,Y

 LDA #254               ; Set the pattern number for this sprite to 254
 STA ySprite0,Y

 INY                    ; Increment Y to point to the third byte for this
                        ; sprite, i.e. attrSprite0,Y

 LDA #%00000011         ; Set the attributes for this sprite as follows:
 STA ySprite0,Y         ;
                        ;   * Bits 0-1    = sprite palette 3
                        ;   * Bit 5 clear = show in front of background
                        ;   * Bit 6 clear = do not flip horizontally
                        ;   * Bit 7 clear = do not flip vertically

 INY                    ; Increment Y to point to the fourth byte for this
                        ; sprite, i.e. xSprite0,Y

 LDA #0                 ; Set the x-coordinate for this sprite to 0
 STA ySprite0,Y

 INY                    ; Increment Y to point to the first byte for the next
                        ; sprite
 BNE rscr5

 JSR SendDashImageToPPU ; Unpack the dashboard image and send it to patterns 69
                        ; to 255 in pattern table 0 in the PPU

                        ; We now set up sprite 0, which is used to detect when
                        ; the PPU starts drawing the icon bar, so this places
                        ; the sprite at the right side of the screen, just
                        ; above the icon bar, so when the PPU gets to this part
                        ; of the screen, it will set the sprite 0 collision flag
                        ; which we can then detect

 LDA #157+YPAL          ; Set sprite 0 as follows:
 STA ySprite0           ;
 LDA #254               ;   * Set the coordinates to (248, 157)
 STA pattSprite0        ;
 LDA #248               ;   * Set the pattern number to 254
 STA xSprite0           ;
 LDA #%00100011         ;   * Set the attributes as follows:
 STA attrSprite0        ;
                        ;     * Bits 0-1    = sprite palette 3
                        ;     * Bit 5 set   = show behind background
                        ;     * Bit 6 clear = do not flip horizontally
                        ;     * Bit 7 clear = do not flip vertically

                        ; We now set sprites 1 to 4 so they contain the four
                        ; corners of the icon bar pointer:
                        ;
                        ;   * Sprite 1 = top-left corner
                        ;   * Sprite 2 = top-right corner
                        ;   * Sprite 3 = bottom-left corner
                        ;   * Sprite 4 = bottom-right corner

 LDA #251               ; Set sprites 1 and 2 to use pattern 251
 STA pattSprite1
 STA pattSprite2

 LDA #253               ; Set sprites 3 and 4 to use pattern 253
 STA pattSprite3
 STA pattSprite4

 LDA #%00000011         ; Set the attributes for sprite 1 as follows:
 STA attrSprite1        ;
                        ;   * Bits 0-1    = sprite palette 3
                        ;   * Bit 5 clear = show in front of background
                        ;   * Bit 6 clear = do not flip horizontally
                        ;   * Bit 7 clear = do not flip vertically

 LDA #%01000011         ; Set the attributes for sprite 2 as follows:
 STA attrSprite2        ;
                        ;   * Bits 0-1    = sprite palette 3
                        ;   * Bit 5 clear = show in front of background
                        ;   * Bit 6 set   = flip horizontally
                        ;   * Bit 7 clear = do not flip vertically

 LDA #%01000011         ; Set the attributes for sprite 3 as follows:
 STA attrSprite3        ;
                        ;   * Bits 0-1    = sprite palette 3
                        ;   * Bit 5 clear = show in front of background
                        ;   * Bit 6 set   = flip horizontally
                        ;   * Bit 7 clear = do not flip vertically

 LDA #%00000011         ; Set the attributes for sprite 4 as follows:
 STA attrSprite4        ;
                        ;   * Bits 0-1    = sprite palette 3
                        ;   * Bit 5 clear = show in front of background
                        ;   * Bit 6 clear = do not flip horizontally
                        ;   * Bit 7 clear = do not flip vertically

 JSR WaitFor3xVBlank    ; Wait for three VBlanks to pass

 LDA #0                 ; Write 0 to OAM_ADDR so we can use OAM_DMA to send
 STA OAM_ADDR           ; sprite data to the PPU

 LDA #$02               ; Write $02 to OAM_DMA to upload 256 bytes of sprite
 STA OAM_DMA            ; data from the sprite buffer at $02xx into the PPU

 LDA #0                 ; Reset all the bitplanes to 0
 STA nmiBitplane
 STA drawingBitplane
 STA hiddenBitplane

 LDA #HI(PPU_PATT_1)    ; Set ppuPatternTableHi to the high byte of PPU pattern
 STA ppuPatternTableHi  ; table 1, which is the table we use for drawing dynamic
                        ; tiles

 LDA #0                 ; Set nmiBitplane8 to 8 * nmiBitplane, which is 0
 STA nmiBitplane8

 LDA #HI(PPU_NAME_0)    ; Set ppuNametableAddr(1 0) to the address of pattern
 STA ppuNametableAddr+1 ; table 0 in the PPU
 LDA #LO(PPU_NAME_0)
 STA ppuNametableAddr

 LDA #%00101000         ; Set both bitplane flags as follows:
 STA bitplaneFlags      ;
 STA bitplaneFlags+1    ;   * Bit 2 clear = send tiles up to configured numbers
                        ;   * Bit 3 set   = clear buffers after sending data
                        ;   * Bit 4 clear = we've not started sending data yet
                        ;   * Bit 5 set   = we have already sent all the data
                        ;   * Bit 6 clear = only send pattern data to the PPU
                        ;   * Bit 7 clear = do not send data to the PPU
                        ;
                        ; Bits 0 and 1 are ignored and are always clear
                        ;
                        ; The NMI handler will now start sending data to the PPU
                        ; according to the above configuration, splitting the
                        ; process across multiple VBlanks if necessary

 LDA #4                 ; Set the number of the first and last tiles to send
 STA clearingPattern    ; from the PPU to 4, which is the first tile after the
 STA clearingPattern+1  ; blank tile (tile 0) and the box edges (tiles 1 to 3),
 STA clearingNameTile   ; which are the only fixed tiles in both bitplanes
 STA clearingNameTile+1 ;
 STA sendingPattern     ; This ensures that both buffers are almost entirely
 STA sendingPattern+1   ; cleared out by the NMI, as we set bit 3 in the
 STA sendingNameTile    ; bitplane flags above
 STA sendingNameTile+1

 LDA #$0F               ; Set the hidden and visible colours to $0F, which is
 STA hiddenColour       ; the HSV value for black, and do the same for the
 STA visibleColour      ; colours to use for palette entries 2 and 3 in the
 STA paletteColour2     ; non-space views
 STA paletteColour3

 LDA #0                 ; Configure the NMI handler not to send palette data to
 STA updatePaletteInNMI ; the PPU

 STA QQ11a              ; Set the old view type in QQ11a to $00 (Space view with
                        ; no fonts loaded)

 LDA #$FF               ; Set bit 7 of screenFadedToBlack to indicate that we
 STA screenFadedToBlack ; have faded the screen to black

 JSR WaitFor3xVBlank    ; Wait for three VBlanks to pass

 LDA #%10010000         ; Set A to use as the new value for PPU_CTRL below

 STA ppuCtrlCopy        ; Store the new value of PPU_CTRL in ppuCtrlCopy so we
                        ; can check its value without having to access the PPU

 STA PPU_CTRL           ; Configure the PPU by setting PPU_CTRL as follows:
                        ;
                        ;   * Bits 0-1    = base nametable address %00 ($2000)
                        ;   * Bit 2 clear = increment PPU_ADDR by 1 each time
                        ;   * Bit 3 clear = sprite pattern table is at $0000
                        ;   * Bit 4 set   = background pattern table is at $1000
                        ;   * Bit 5 clear = sprites are 8x8 pixels
                        ;   * Bit 6 clear = use PPU 0 (the only option on a NES)
                        ;   * Bit 7 set   = enable VBlank NMI generation

 RTS                    ; Return from the subroutine


       Name: SetIconBarRow                                           [Show more]
       Type: Subroutine
   Category: Icon bar
    Summary: Set the row on which the icon bar appears, which depends on the
             view type
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * UpdateIconBar calls SetIconBarRow
             * ShowIconBar calls via RTS9


 Other entry points:

   RTS9                 Contains an RTS


.SetIconBarRow

 LDA QQ11               ; If the view type in QQ11 is not $BA (Market Price),
 CMP #$BA               ; then jump to bpos2 to calculate the icon bar row
 BNE bpos2

 LDA iconBarType        ; If this is icon bar type 3 (Pause), jump to bpos1 to
 CMP #3                 ; hide the Inventory icon before calculating the icon
 BEQ bpos1              ; bar row

                        ; If we get here then this is the Market Price screen
                        ; and the game is not paused, so we are showing the
                        ; normal icon bar for this screen
                        ;
                        ; The Market Price screen uses the normal Docked or
                        ; Flight icon bar, but with the second icon overwritten
                        ; with the Inventory icon

 JSR DrawInventoryIcon  ; Draw the inventory icon on top of the second button
                        ; in the icon bar

 JMP bpos2              ; Jump to bpos2 to calculate the icon bar row

.bpos1

                        ; If we get here then this is the Market Price screen
                        ; and we are showing the pause options on the icon bar,
                        ; so we need to hide the Inventory icon from the second
                        ; button on the icon bar, so it doesn't overwrite the
                        ; pause options
                        ;
                        ; The Inventory button is in sprites 8 to 11, so we now
                        ; hide these sprites by moving them off-screen

 LDX #240               ; Hide sprites 8 to 11 by setting their y-coordinates to
 STX ySprite8           ; to 240, which is off the bottom of the screen
 STX ySprite9
 STX ySprite10
 STX ySprite11

.bpos2

 LDA #HI(20*32)         ; Set iconBarRow(1 0) = 20*32
 STA iconBarRow+1
 LDA #LO(20*32)
 STA iconBarRow

 LDA QQ11               ; If bit 7 of the view type in QQ11 is clear then there
 BPL RTS9               ; is a dashboard, so jump to RTS9 to keep this value of
                        ; iconBarRow and return from the subroutine

 LDA #HI(27*32)         ; Set iconBarRow(1 0) = 27*32
 STA iconBarRow+1       ;
 LDA #LO(27*32)         ; So the icon bar is on row 20 if bit 7 of the view
 STA iconBarRow         ; number is clear (so there is a dashboard), and it's on
                        ; row 27 is bit 7 is set (so there is no dashboard)

.RTS9

 RTS                    ; Return from the subroutine


       Name: ShowIconBar                                             [Show more]
       Type: Subroutine
   Category: Icon bar
    Summary: Show a specified icon bar on-screen
  Deep dive: Views and view types in NES Elite
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * ShowIconBar_b3 calls ShowIconBar


 Arguments:

   A                    The type of icon bar to show:

                          * 0 = Docked

                          * 1 = Flight

                          * 2 = Charts

                          * 3 = Pause

                          * 4 = Title screen copyright message


.ShowIconBar

 TAY                    ; Copy the icon bar type into Y

 LDA QQ11               ; If bit 6 of the view type is set, then there is no
 AND #%01000000         ; icon bar on the screen, so jump to RTS9 to return
 BNE RTS9               ; from the subroutine as there is nothing to show

 STY iconBarType        ; Set the type of the current icon bar in iconBarType to
                        ; to the new type in Y

 JSR BlankAllButtons    ; Blank all the buttons on the icon bar

 LDA #HI(20*32)         ; Set iconBarRow(1 0) = 20*32
 STA iconBarRow+1
 LDA #LO(20*32)
 STA iconBarRow

 LDA QQ11               ; If bit 7 of the view type in QQ11 is clear then there
 BPL obar1              ; is a dashboard, so jump to obar1 to keep this value of
                        ; iconBarRow

 LDA #HI(27*32)         ; Set iconBarRow(1 0) = 27*32
 STA iconBarRow+1       ;
 LDA #LO(27*32)         ; So the icon bar is on row 20 if bit 7 of the view
 STA iconBarRow         ; number is clear (so there is a dashboard), and it's on
                        ; row 27 is bit 7 is set (so there is no dashboard)

.obar1

 LDA iconBarType        ; Set iconBarImageHi to the high byte of the correct
 ASL A                  ; icon bar image block for the current icon bar type,
 ASL A                  ; which we can calculate like this:
 ADC #HI(iconBarImage0) ;
 STA iconBarImageHi     ;   HI(iconBarImage0) + 4 * iconBarType
                        ;
                        ; as each icon bar image block contains $0400 bytes,
                        ; and iconBarType is the icon bar type, 0 to 4

 LDX #0                 ; Set barPatternCounter = 0 so the NMI handler sends the
 STX barPatternCounter  ; icon bar's nametable and pattern data to the PPU

.obar2

 SETUP_PPU_FOR_ICON_BAR ; If the PPU has started drawing the icon bar, configure
                        ; the PPU to use nametable 0 and pattern table 0

 LDA barPatternCounter  ; Loop back to keep the PPU configured in this way until
 BPL obar2              ; barPatternCounter is set to 128
                        ;
                        ; This happens when the NMI handler has finished sending
                        ; all the icon bar's nametable and pattern data to
                        ; the PPU, so this loop keeps the PPU configured to use
                        ; nametable 0 and pattern table 0 until the icon bar
                        ; nametable and pattern data have all been sent

                        ; Fall through into UpdateIconBar to update the icon bar


       Name: UpdateIconBar                                           [Show more]
       Type: Subroutine
   Category: Icon bar
    Summary: Update the icon bar
  Deep dive: Views and view types in NES Elite
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * UpdateIconBar_b3 calls UpdateIconBar


.UpdateIconBar

 LDA iconBarType        ; Set A to the current icon bar type

 JSR SetupIconBar       ; Set up the icon bar

 LDA QQ11               ; If bit 6 of the view type is set, then there is no
 AND #%01000000         ; icon bar on the screen, so jump to ubar2 to return
 BNE ubar2              ; from the subroutine as there is no icon bar to update

 JSR SetIconBarRow      ; Set the row on which the icon bar appears, which
                        ; depends on the view type

 LDA #%10000000         ; Set bit 7 of skipBarPatternsPPU, so the NMI handler
 STA skipBarPatternsPPU ; only sends the nametable entries and not the tile
                        ; patterns

 ASL A                  ; Set barPatternCounter = 0, so the NMI handler sends
 STA barPatternCounter  ; icon bar data to the PPU

.ubar1

 SETUP_PPU_FOR_ICON_BAR ; If the PPU has started drawing the icon bar, configure
                        ; the PPU to use nametable 0 and pattern table 0

 LDA barPatternCounter  ; Loop back to keep the PPU configured in this way until
 BPL ubar1              ; barPatternCounter is set to 128
                        ;
                        ; This happens when the NMI handler has finished sending
                        ; all the icon bar's nametable entries to the PPU, so
                        ; this loop keeps the PPU configured to use nametable 0
                        ; and pattern table 0 until the icon bar nametable
                        ; entries have been sent

 ASL skipBarPatternsPPU ; Set skipBarPatternsPPU = 0, so the NMI handler goes
                        ; back to sending both nametable entries and tile
                        ; patterns for the icon bar (when barPatternCounter is
                        ; non-zero)

.ubar2

 RTS                    ; Return from the subroutine


       Name: SetupSprite0                                            [Show more]
       Type: Subroutine
   Category: PPU
    Summary: Set the coordinates of sprite 0 so we can detect when the PPU
             starts to draw the icon bar
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * SendViewToPPU calls SetupSprite0
             * SetupViewInNMI calls SetupSprite0


.SetupSprite0

 SETUP_PPU_FOR_ICON_BAR ; If the PPU has started drawing the icon bar, configure
                        ; the PPU to use nametable 0 and pattern table 0

 LDA #248               ; Set the x-coordinate of sprite 0 to 248
 STA xSprite0

                        ; We now set X and Y depending on the type of view, as
                        ; follows:
                        ;
                        ;   * X is the pixel y-coordinate of sprite 0, which is
                        ;     positioned just above the icon bar
                        ;
                        ;   * Y is the row containing the top part of the icon
                        ;     bar pointer

 LDY #18                ; Set Y = 18

 LDX #157+YPAL          ; Set X = 157

 LDA QQ11               ; If bit 7 of the view type in QQ11 is clear then there
 BPL sets4              ; is a dashboard, so jump to sets4 with X = 157 and
                        ; Y = 18

 CMP #$C4               ; If the view type in QQ11 is not $C4 (Game Over screen)
 BNE sets1              ; then jump to sets1 to keep checking the view type

 LDX #240               ; This is the Game Over screen, so jump to sets 4 with
 BNE sets4              ; X = 240 and Y = 18 (this BNE is effectively a JMP as
                        ; X is never zero)

.sets1

 LDY #25                ; Set Y = 25

 LDX #213+YPAL          ; Set X = 213

 CMP #$B9               ; If the view type in QQ11 is not $B9 (Equip Ship) then
 BNE sets2              ; jump to sets2 to keep checking the view type

 LDX #150+YPAL          ; This is the Equip Ship screen, so set X = 150

 LDA #248               ; Set the x-coordinate of sprite 0 to 248 (though we
 STA xSprite0           ; already did this above, so perhaps this is left over
                        ; code from development)

.sets2

 LDA QQ11               ; If the view type in QQ11 is not $xF (the Start screen
 AND #$0F               ; in any of its font configurations), jump to sets3 to
 CMP #$0F               ; keep checking the view type
 BNE sets3

 LDX #166+YPAL          ; This is the Start screen, so set X = 166

.sets3

 CMP #$0D               ; If the view type in QQ11 is not $xD (the Long-range or
 BNE sets4              ; Short-range Chart), jump to sets4 to use the current
                        ; values of X and Y

 LDX #173+YPAL          ; This is a chart screen, so set X = 173

 LDA #248               ; Set the x-coordinate of sprite 0 to 248 (though we
 STA xSprite0           ; already did this above, so perhaps this is left over
                        ; code from development)

.sets4

                        ; We get here with X and Y set as follows:
                        ;
                        ;   * X = 157, Y = 18 if there is a dashboard
                        ;   * X = 240, Y = 18 if this is the Game Over screen
                        ;   * X = 150, Y = 25 if this is the Equip Ship screen
                        ;   * X = 166, Y = 25 if this is the Start screen
                        ;   * X = 173, Y = 25 if this is a chart screen
                        ;   * X = 213, Y = 25 otherwise
                        ;
                        ; In all cases the x-coordinate of sprite 0 is 248

 STX ySprite0           ; Set the y-coordinate of sprite 0 to X
                        ;
                        ; This means that sprite 0 is at these coordinates:
                        ;
                        ;   * (248, 157) if there is a dashboard
                        ;   * (248, 240) if this is the Game Over screen
                        ;   * (248, 150) if this is the Equip Ship screen
                        ;   * (248, 166) if this is the Start screen
                        ;   * (248, 173) if this is a chart screen
                        ;   * (248, 213) otherwise

 TYA                    ; Set the y-coordinate of the icon bar pointer in
 SEC                    ; yIconBarPointer to Y * 8 + %100, which is either
 ROL A                  ; 148 or 204 (when Y is 18 or 25)
 ASL A                  ;
 ASL A                  ; This means the icon bar pointer is at y-coordinate
 STA yIconBarPointer    ; 148 when there is a dashboard or this is the Game Over
                        ; screen, and it's at y-coordinate 204 otherwise

 LDA iconBarType        ; Set iconBarImageHi to the high byte of the correct
 ASL A                  ; icon bar image block for the current icon bar type,
 ASL A                  ; which we can calculate like this:
 ADC #HI(iconBarImage0) ;
 STA iconBarImageHi     ;   HI(iconBarImage0) + 4 * iconBarType
                        ;
                        ; as each icon bar image block contains $0400 bytes,
                        ; and iconBarType is the icon bar type, 0 to 4

 LDA QQ11               ; If bit 6 of the view type is set, then there is no
 AND #%01000000         ; icon bar, so jump to sets5 to skip the following
 BNE sets5              ; instruction

 LDX #0                 ; If we get here then there is an icon bar, so set
 STX barPatternCounter  ; barPatternCounter = 0 so the NMI handler sends the
                        ; icon bar's nametable and pattern data to the PPU

.sets5

 RTS                    ; Return from the subroutine


       Name: BlankAllButtons                                         [Show more]
       Type: Subroutine
   Category: Icon bar
    Summary: Blank all the buttons on the icon bar
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * ShowIconBar calls BlankAllButtons


.BlankAllButtons

 JSR DrawIconBar        ; Draw the icon bar into the nametable buffers for both
                        ; bitplanes
                        ;
                        ; This also sets the following variables, which we pass
                        ; to the following routines:
                        ;
                        ;   * SC(1 0) is the address of the nametable entries
                        ;     for the on-screen icon bar in nametable buffer 0
                        ;
                        ;   * SC2(1 0) is the address of the nametable entries
                        ;     for the on-screen icon bar in nametable buffer 1

 LDY #2                 ; Blank the first button on the icon bar
 JSR DrawBlankButton2x2

 LDY #4                 ; Blank the second button on the icon bar
 JSR DrawBlankButton3x2

 LDY #7                 ; Blank the third button on the icon bar
 JSR DrawBlankButton2x2

 LDY #9                 ; Blank the fourth button on the icon bar
 JSR DrawBlankButton3x2

 LDY #12                ; Blank the fifth button on the icon bar
 JSR DrawBlankButton2x2

 LDY #29                ; Blank the twelfth button on the icon bar
 JSR DrawBlankButton3x2


       Name: BlankButtons6To11                                       [Show more]
       Type: Subroutine
   Category: Icon bar
    Summary: Blank from the sixth to the eleventh button on the icon bar
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * SetupIconBarPause calls BlankButtons6To11


.BlankButtons6To11

 LDY #14                ; Blank the sixth button on the icon bar
 JSR DrawBlankButton3x2

 LDY #17                ; Blank the seventh button on the icon bar
 JSR DrawBlankButton2x2


       Name: BlankButtons8To11                                       [Show more]
       Type: Subroutine
   Category: Icon bar
    Summary: Blank from the eighth to the eleventh button on the icon bar
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * SetupIconBarCharts calls BlankButtons8To11
             * SetupIconBarFlight calls BlankButtons8To11


.BlankButtons8To11

 LDY #19                ; Blank the eighth button on the icon bar
 JSR DrawBlankButton3x2

 LDY #22                ; Blank the ninth button on the icon bar
 JSR DrawBlankButton2x2

 LDY #24                ; Blank the tenth button on the icon bar
 JSR DrawBlankButton3x2

 LDY #27                ; Blank the eleventh button on the icon bar and return
 JMP DrawBlankButton2x2 ; from the subroutine using a tail call


       Name: DrawIconBar                                             [Show more]
       Type: Subroutine
   Category: Icon bar
    Summary: Draw the icon bar into the nametable buffers for both bitplanes
    Context: See this subroutine on its own page
 References: This subroutine is called as follows:
             * BlankAllButtons calls DrawIconBar
             * SetupIconBar calls DrawIconBar


 Returns:

   SC(1 0)              The address of the nametable entries for the on-screen
                        icon bar in nametable buffer 0

   SC2(1 0)             The address of the nametable entries for the on-screen
                        icon bar in nametable buffer 1


.DrawIconBar

                        ; We start by setting V(1 0) to the address of the
                        ; barNames table that corresponds to the current icon
                        ; bar type (i.e. barNames0 to barNames4)
                        ;
                        ; This contains the nametable entries we need to put in
                        ; the nametable buffer to show this icon bar type on
                        ; the screen

 LDA iconBarType        ; Set (C Y) = iconBarType << 6
 ASL A                  ;           = iconBarType * 64
 ASL A
 ASL A
 ASL A
 ASL A
 ASL A
 TAY

 BNE dbar1              ; If Y is non-zero (i.e. iconBarType = 1 to 3), jump to
                        ; dbar1 to set A = HI(barNames0)

 LDA #HI(barNames0)-1   ; Otherwise Y is zero (i.e. iconBarType = 0 or 4) so set
 BNE dbar2              ; A = HI(barNames0) - 1 and jump to dbar2 to skip the
                        ; following (this BNE is effectively a JMP as A is never
                        ; zero)

.dbar1

 LDA #HI(barNames0)     ; Set A = HI(barNames0) for when iconBarType = 1 to 3

.dbar2

                        ; When we get here, we have A set as follows:
                        ;
                        ;   * HI(barNames0) - 1        when iconBarType = 0 or 4
                        ;
                        ;   * HI(barNames0)            when iconBarType = 1 to 3

 DEY                    ; Decrement Y, so Y is now:
                        ;
                        ;   * $FF                     when iconBarType = 0 or 4
                        ;
                        ;   * iconBarType * 64 - 1    when iconBarType = 1 to 3

 STY V                  ; Set V(1 0) = (A 0) + (C 0) + Y
 ADC #0                 ;
 STA V+1                ; So this sets V(1 0) to the following:
                        ;
                        ;   * When iconBarType = 0:
                        ;
                        ;       (HI(barNames0)-1 0) + (0 0) + $FF
                        ;       (HI(barNames0)-1 0) + $FF
                        ;     = (HI(barNames0)-1 0) + (1 0) - 1
                        ;     = (HI(barNames0) 0) - 1
                        ;     = (HI(barNames0) 0) + iconBarType * 64 - 1
                        ;
                        ;   * When iconBarType = 1 to 3
                        ;
                        ;       (HI(barNames0) 0) + (0 0) + iconBarType * 64 - 1
                        ;     = (HI(barNames0) 0) + iconBarType * 64 - 1
                        ;
                        ;   * When iconBarType = 4
                        ;
                        ;       (HI(barNames0-1 0) + (1 0) + $FF
                        ;     = (HI(barNames0-1 0) + (1 0) + (1 0) - 1
                        ;     = (HI(barNames0) 0) + (1 0) - 1
                        ;     = (HI(barNames0) 0) + 4 * 64 - 1
                        ;     = (HI(barNames0) 0) + iconBarType * 64 - 1
                        ;
                        ; In other words, V(1 0) is as follows, for all the icon
                        ; bar types:
                        ;
                        ;   V(1 0) = (HI(barNames0) 0) + iconBarType * 64 - 1
                        ;
                        ; and because barNames0 is on a page boundary, we know
                        ; that LO(barNames0) = 0, so:
                        ;
                        ;   (HI(barNames0) 0) = (HI(barNames0) LO(barNames0))
                        ;                     = barNames0(1 0)
                        ;
                        ; So we have:
                        ;
                        ;   V(1 0) = barNames0(1 0) + iconBarType * 64 - 1
                        ;
                        ; barNames0 through barNames4 each contain 64 bytes, for
                        ; the two rows of 32 tiles that make up the icon bar,
                        ; and they are one after the other in memory, so V(1 0)
                        ; therefore contains the address of the relevant table
                        ; for the current icon bar's nametable entries (i.e.
                        ; barNames0 to barNames4), minus 1
                        ;
                        ; Let's refer to the relevant table from barNames0 to
                        ; barNames4 as barNames, to make things simpler, so we
                        ; have the following:
                        ;
                        ;   V(1 0) = barNames - 1

                        ; Next, we set SC(1 0) and SC2(1 0) to the addresses in
                        ; the two nametable buffers for the icon bar, so we can
                        ; write the nametable entries there to draw the icon bar
                        ; on-screen

 LDA QQ11               ; If bit 7 of the view type in QQ11 is set then there
 BMI dbar3              ; is no dashboard and the icon bar is at the bottom of
                        ; the screen, so jump to dbar3 to set SC(1 0) and
                        ; SC2(1 0) accordingly

 LDA #HI(nameBuffer0+20*32) ; Set SC(1 0) to the address of the first tile on
 STA SC+1                   ; tile row 20 in nametable buffer 0
 LDA #LO(nameBuffer0+20*32)
 STA SC

 LDA #HI(nameBuffer1+20*32) ; Set SC2(1 0) to the address of the first tile on
 STA SC2+1                  ; tile row 20 in nametable buffer 1
 LDA #LO(nameBuffer1+20*32)
 STA SC2

 JMP dbar4              ; Jump to dbar4 to skip the following

.dbar3

 LDA #HI(nameBuffer0+27*32) ; Set SC(1 0) to the address of the first tile on
 STA SC+1                   ; tile row 27 in nametable buffer 0
 LDA #LO(nameBuffer0+27*32)
 STA SC

 LDA #HI(nameBuffer1+27*32) ; Set SC2(1 0) to the address of the first tile on
 STA SC2+1                  ; tile row 27 in nametable buffer 1
 LDA #LO(nameBuffer1+27*32)
 STA SC2

 SETUP_PPU_FOR_ICON_BAR ; If the PPU has started drawing the icon bar, configure
                        ; the PPU to use nametable 0 and pattern table 0

.dbar4

                        ; By this point, we have the following:
                        ;
                        ;   * V(1 0) is the address of the icon bar's nametable
                        ;     table (from barNames0 to barNames4), minus 1,
                        ;     i.e. V(1 0) = barNames - 1
                        ;
                        ;   * SC(1 0) is the address of the nametable entries
                        ;     for the on-screen icon bar in nametable buffer 0
                        ;
                        ;   * SC2(1 0) is the address of the nametable entries
                        ;     for the on-screen icon bar in nametable buffer 1
                        ;
                        ; So to draw the icon bar on-screen, we need to copy the
                        ; nametable entries from V(1 0) to both SC(1 0) and
                        ; SC2(1 0)

 LDY #63                ; Set Y as an index, which will count down from 63 to 1,
                        ; so we copy bytes 0 to 62 in V(1 0) to bytes 1 to 63
                        ; in the nametable buffers
                        ;
                        ; We do this in two stages purely so we can clip in a
                        ; call to the SETUP_PPU_FOR_ICON_BAR macro

.dbar5

 LDA (V),Y              ; Copy the Y-th nametable entry from V(1 0) to SC(1 0)
 STA (SC),Y

 STA (SC2),Y            ; Copy the Y-th nametable entry from V(1 0) to SC2(1 0)

 DEY                    ; Decrement the index counter

 CPY #33                ; Loop back until we have done Y = 63 to 34
 BNE dbar5

 SETUP_PPU_FOR_ICON_BAR ; If the PPU has started drawing the icon bar, configure
                        ; the PPU to use nametable 0 and pattern table 0

.dbar6

 LDA (V),Y              ; Copy the Y-th nametable entry from V(1 0) to SC(1 0)
 STA (SC),Y

 STA (SC2),Y            ; Copy the Y-th nametable entry from V(1 0) to SC2(1 0)

 DEY                    ; Decrement the index counter

 BNE dbar6              ; Loop back until we have done Y = 33 to 1

 SETUP_PPU_FOR_ICON_BAR ; If the PPU has started drawing the icon bar, configure
                        ; the PPU to use nametable 0 and pattern table 0

                        ; By this point we have copied bytes 0 to 62 in V(1 0)
                        ; to bytes 1 to 63 in the nametable buffers, and because
                        ; V(1 0) = barNames - 1, this means we have copied
                        ; bytes 1 to 63 from the relevant barNames table to the
                        ; nametable buffers
                        ;
                        ; This covers almost all of the two rows of 3 characters
                        ; that make up the icon bar, but it is one short, as we
                        ; aren't done yet
                        ;
                        ; Because the horizontal scroll in PPU_SCROLL is set to
                        ; 8, the leftmost tile on each row is scrolled around to
                        ; the right side, which means that in terms of tiles,
                        ; column 1 is the left edge of the screen, then columns
                        ; 2 to 31 form the body of the screen, and column 0 is
                        ; the right edge of the screen
                        ;
                        ; We therefore have to fix the tiles that appear at the
                        ; end of each row, i.e. column 0 on row 0 (for the end
                        ; of the top row of the icon bar) and column 0 on row 1
                        ; (for the end of the bottom row of the icon bar)

 LDY #32                ; Copy byte 32 from V(1 0), i.e. byte 31 of barNames,
 LDA (V),Y              ; to byte 0 of SC(1 0) and SC2(1 0), which moves the
 LDY #0                 ; tile at the end of the first row of the icon bar into
 STA (SC),Y             ; column 0 on row 0 (for the end of the top row of the
 STA (SC2),Y            ; icon bar on-screen)

 LDY #64                ; Copy byte 64 from V(1 0), i.e. byte 63 of barNames,
 LDA (V),Y              ; to byte 32 of SC(1 0) and SC2(1 0), which moves the
 LDY #32                ; tile at the end of the second row of the icon bar into
 STA (SC),Y             ; column 0 on row 1 (for the end of the bottom row of
 STA (SC2),Y            ; the icon bar on-screen)

 RTS                    ; Return from the subroutine