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⌂ ∞ ▽ Elite on the 6502

Dashboard: SPBT

[6502 Second Processor version, I/O processor]

       Name: SPBT                                                    [Show more]
       Type: Variable
   Category: Dashboard
    Summary: The bitmap definition for the space station indicator bulb

    Context: See this variable in context in the source code
 Variations: See code variations for this variable in the different versions
 References: This variable is used as follows:
             * DOBULB uses SPBT




 The bitmap definition for the space station indicator's "S" bulb that gets
 displayed on the dashboard.

 The bulb is four pixels wide, so it covers two mode 2 character blocks, one
 containing the left half of the "S", and the other the right half, which are
 displayed next to each other. Each pixel is in mode 2 colour 7 (%1111), which
 is white.



.SPBT

                        \ Left half of the "S" bulb
                        \
 EQUB %11111111         \ x x
 EQUB %11111111         \ x x
 EQUB %10101010         \ x .
 EQUB %11111111         \ x x
 EQUB %11111111         \ x x
 EQUB %00000000         \ . .
 EQUB %11111111         \ x x
 EQUB %11111111         \ x x

                        \ Right half of the "S" bulb
                        \
 EQUB %11111111         \ x x
 EQUB %11111111         \ x x
 EQUB %00000000         \ . .
 EQUB %11111111         \ x x
 EQUB %11111111         \ x x
 EQUB %01010101         \ . x
 EQUB %11111111         \ x x
 EQUB %11111111         \ x x

                        \ Combined "S" bulb
                        \
                        \ x x x x
                        \ x x x x
                        \ x . . .
                        \ x x x x
                        \ x x x x
                        \ . . . x
                        \ x x x x
                        \ x x x x