Map of the source code

Workspace: ZP (Loader)

Important variables used by the loader

Subroutine: Elite loader (Part 1 of 6) (Loader)

Include binaries for recursive tokens, Python blueprint and images

Variable: B% (Loader)

VDU commands for setting the square mode 4 screen

Variable: E% (Loader)

Sound envelope definitions

Subroutine: swine (Loader)

Resets the machine if the copy protection detects a problem

Subroutine: OSB (Loader)

A convenience routine for calling OSBYTE with Y = 0

Variable: Authors' names (Loader)

The authors' names, buried in the code

Variable: oscliv (Loader)

Contains the address of OSCLIV, for executing OS commands

Variable: David9 (Loader)

Address used as part of the stack-based decryption loop

Variable: David23 (Loader)

Address pointer to the start of the 6502 stack

Subroutine: doPROT1 (Loader)

Routine to self-modify the loader code

Variable: MHCA (Loader)

Used to set one of the vectors in the copy protection code

Subroutine: David7 (Loader)

Part of the multi-jump obfuscation code in PROT1

Macro: FNE (Loader)

Macro definition for defining a sound envelope

Subroutine: Elite loader (Part 2 of 6) (Loader)

Perform a number of OS calls, set up sound, push routines on stack

Subroutine: Elite loader (Part 3 of 6) (Loader)

Move and decrypt recursive tokens, Python blueprint and images

Subroutine: Elite loader (Part 4 of 6) (Loader)

Copy more code onto stack, decrypt TUT block, set up IRQ1 handler

Subroutine: PLL1 (Part 1 of 3) (Loader)

Draw Saturn on the loading screen (draw the planet)

Subroutine: PLL1 (Part 2 of 3) (Loader)

Draw Saturn on the loading screen (draw the stars)

Subroutine: PLL1 (Part 3 of 3) (Loader)

Draw Saturn on the loading screen (draw the rings)

Subroutine: DORND (Loader)

Generate random numbers

Subroutine: SQUA2 (Loader)

Calculate (A P) = A * A

Subroutine: PIX (Loader)

Draw a single pixel at a specific coordinate

Variable: TWOS (Loader)

Ready-made single-pixel character row bytes for mode 4

Variable: CNT (Loader)

A counter for use in drawing Saturn's planetary body

Variable: CNT2 (Loader)

A counter for use in drawing Saturn's background stars

Variable: CNT3 (Loader)

A counter for use in drawing Saturn's rings

Subroutine: ROOT (Loader)

Calculate ZP = SQRT(ZP(1 0))

Subroutine: BEGIN% (Loader)

Single-byte decryption and copying routine, run on the stack

Subroutine: DOMOVE (Loader)

Multi-byte decryption and copying routine, run on the stack

Workspace: UU% (Loader)

Marker for a block that is moved as part of the obfuscation

Variable: CHECKbyt (Loader)

Checksum for the validity of the UU% workspace

Variable: MAINSUM (Loader)

Two checksums for the decryption header and text token table

Variable: FOOLV (Loader)

Part of the AFOOL roundabout obfuscation routine

Variable: CHECKV (Loader)

The address of the LBL routine in the decryption header

Variable: block1 (Loader)

Palette data for the two dashboard colour scheme

Variable: block2 (Loader)

Palette data for the space part of the screen

Subroutine: TT26 (Loader)

Print a character at the text cursor (WRCHV points here)

Subroutine: osprint (Loader)

Print a character

Subroutine: command (Loader)

Execute an OS command

Variable: MESS1 (Loader)

Contains an OS command string for loading the main game code

Subroutine: Elite loader (Part 5 of 6) (Loader)

Load main game code, decrypt it, move it to the correct location

Variable: M2 (Loader)

Used for testing the 6522 System VIA status byte in IRQ1

Subroutine: IRQ1 (Loader)

The loader's screen-mode interrupt handler (IRQ1V points here)

Variable: BLOCK (Loader)

Addresses for the obfuscated jumps that use RTS not JMP

Subroutine: Elite loader (Part 6 of 6) (Loader)

Set up interrupt vectors, calculate checksums, run main game code

Subroutine: CHECKER (Loader)

Run checksum checks on tokens, loader and tape block count

Variable: XC (Loader)

The x-coordinate of the text cursor

Variable: YC (Loader)

The y-coordinate of the text cursor

Workspace: ZP

Lots of important variables are stored in the zero page workspace as it is quicker and more space-efficient to access memory here

Workspace: XX3

Temporary storage space for complex calculations

Workspace: T%

Current commander data and stardust data blocks

Macro: CHAR

Macro definition for characters in the recursive token table

Macro: TWOK

Macro definition for two-letter tokens in the token table

Macro: CONT

Macro definition for control codes in the recursive token table

Macro: RTOK

Macro definition for recursive tokens in the recursive token table

Variable: QQ18

The recursive token table for tokens 0-148

Workspace: K%

Ship data blocks and ship line heaps

Workspace: WP

Ship slots, variables

Workspace: S%

Vector addresses, compass colour and configuration settings

Subroutine: Main flight loop (Part 1 of 16)

Seed the random number generator

Subroutine: Main flight loop (Part 2 of 16)

Calculate the alpha and beta angles from the current pitch and roll of our ship

Subroutine: Main flight loop (Part 3 of 16)

Scan for flight keys and process the results

Subroutine: Main flight loop (Part 4 of 16)

For each nearby ship: Copy the ship's data block from K% to the zero-page workspace at INWK

Subroutine: Main flight loop (Part 5 of 16)

For each nearby ship: If an energy bomb has been set off, potentially kill this ship

Subroutine: Main flight loop (Part 6 of 16)

For each nearby ship: Move the ship in space and copy the updated INWK data block back to K%

Subroutine: Main flight loop (Part 7 of 16)

For each nearby ship: Check whether we are docking, scooping or colliding with it

Subroutine: Main flight loop (Part 8 of 16)

For each nearby ship: Process us potentially scooping this item

Subroutine: Main flight loop (Part 9 of 16)

For each nearby ship: If it is a space station, check whether we are successfully docking with it

Subroutine: Main flight loop (Part 10 of 16)

For each nearby ship: Remove if scooped, or process collisions

Subroutine: Main flight loop (Part 11 of 16)

For each nearby ship: Process missile lock and firing our laser

Subroutine: Main flight loop (Part 12 of 16)

For each nearby ship: Draw the ship, remove if killed, loop back

Subroutine: Main flight loop (Part 13 of 16)

Show energy bomb effect, charge shields and energy banks

Subroutine: Main flight loop (Part 14 of 16)

Spawn a space station if we are close enough to the planet

Subroutine: Main flight loop (Part 15 of 16)

Perform altitude checks with the planet and sun and process fuel scooping if appropriate

Subroutine: Main flight loop (Part 16 of 16)

Process laser pulsing, E.C.M. energy drain, call stardust routine

Subroutine: MAS1

Add an orientation vector coordinate to an INWK coordinate

Subroutine: MAS2

Calculate a cap on the maximum distance to the planet or sun

Subroutine: MAS3

Calculate A = x_hi^2 + y_hi^2 + z_hi^2 in the K% block

Subroutine: MVEIT (Part 1 of 9)

Move current ship: Tidy the orientation vectors

Subroutine: MVEIT (Part 2 of 9)

Move current ship: Call tactics routine, remove ship from scanner

Subroutine: MVEIT (Part 3 of 9)

Move current ship: Move ship forward according to its speed

Subroutine: MVEIT (Part 4 of 9)

Move current ship: Apply acceleration to ship's speed as a one-off

Subroutine: MVEIT (Part 5 of 9)

Move current ship: Rotate ship's location by our pitch and roll

Subroutine: MVEIT (Part 6 of 9)

Move current ship: Move the ship in space according to our speed

Subroutine: MVEIT (Part 7 of 9)

Move current ship: Rotate ship's orientation vectors by pitch/roll

Subroutine: MVEIT (Part 8 of 9)

Move current ship: Rotate ship about itself by its own pitch/roll

Subroutine: MVEIT (Part 9 of 9)

Move current ship: Redraw on scanner, if it hasn't been destroyed

Subroutine: MVT1

Calculate (x_sign x_hi x_lo) = (x_sign x_hi x_lo) + (A R)

Subroutine: MVT3

Calculate K(3 2 1) = (x_sign x_hi x_lo) + K(3 2 1)

Subroutine: MVS4

Apply pitch and roll to an orientation vector

Subroutine: MVS5

Apply a 3.6 degree pitch or roll to an orientation vector

Subroutine: MVT6

Calculate (A P+2 P+1) = (x_sign x_hi x_lo) + (A P+2 P+1)

Subroutine: MV40

Rotate the planet or sun's location in space by the amount of pitch and roll of our ship

Variable: NA%

The data block for the last saved commander

Variable: CHK2

Second checksum byte for the saved commander data file

Variable: CHK

First checksum byte for the saved commander data file

Variable: UNIV

Table of pointers to the local universe's ship data blocks

Variable: TWOS

Ready-made single-pixel character row bytes for mode 4

Variable: TWOS2

Ready-made double-pixel character row bytes for mode 4

Variable: CTWOS

Ready-made single-pixel character row bytes for mode 5

Subroutine: LOIN (Part 1 of 7)

Draw a line: Calculate the line gradient in the form of deltas

Subroutine: LOIN (Part 2 of 7)

Draw a line: Line has a shallow gradient, step right along x-axis

Subroutine: LOIN (Part 3 of 7)

Draw a shallow line going right and up or left and down

Subroutine: LOIN (Part 4 of 7)

Draw a shallow line going right and down or left and up

Subroutine: LOIN (Part 5 of 7)

Draw a line: Line has a steep gradient, step up along y-axis

Subroutine: LOIN (Part 6 of 7)

Draw a steep line going up and left or down and right

Subroutine: LOIN (Part 7 of 7)

Draw a steep line going up and right or down and left

Subroutine: NLIN3

Print a title and draw a horizontal line at row 19 to box it in

Subroutine: NLIN4

Draw a horizontal line at pixel row 19 to box in a title

Subroutine: NLIN

Draw a horizontal line at pixel row 23 to box in a title

Subroutine: NLIN2

Draw a screen-wide horizontal line at the pixel row in A

Subroutine: HLOIN2

Remove a line from the sun line heap and draw it on-screen

Subroutine: HLOIN

Draw a horizontal line from (X1, Y1) to (X2, Y1)

Variable: TWFL

Ready-made character rows for the left end of a horizontal line in mode 4

Variable: TWFR

Ready-made character rows for the right end of a horizontal line in mode 4

Subroutine: PX3

Plot a single pixel at (X, Y) within a character block

Subroutine: PIX1

Calculate (YY+1 SYL+Y) = (A P) + (S R) and draw stardust particle

Subroutine: PIXEL2

Draw a stardust particle relative to the screen centre

Subroutine: PIXEL

Draw a one-pixel dot, two-pixel dash or four-pixel square

Subroutine: BLINE

Draw a circle segment and add it to the ball line heap

Subroutine: FLIP

Reflect the stardust particles in the screen diagonal and redraw the stardust field

Subroutine: STARS

The main routine for processing the stardust

Subroutine: STARS1

Process the stardust for the front view

Subroutine: STARS6

Process the stardust for the rear view

Variable: PRXS

Equipment prices

Subroutine: STATUS

Show the Status Mode screen (red key f8)

Subroutine: plf2

Print text followed by a newline and indent of 6 characters

Variable: TENS

A constant used when printing large numbers in BPRNT

Subroutine: pr2

Print an 8-bit number, left-padded to 3 digits, and optional point

Subroutine: TT11

Print a 16-bit number, left-padded to n digits, and optional point

Subroutine: BPRNT

Print a 32-bit number, left-padded to a specific number of digits, with an optional decimal point

Subroutine: BELL

Make a standard system beep

Subroutine: TT26

Print a character at the text cursor by poking into screen memory

Subroutine: DIALS (Part 1 of 4)

Update the dashboard: speed indicator

Subroutine: DIALS (Part 2 of 4)

Update the dashboard: pitch and roll indicators

Subroutine: DIALS (Part 3 of 4)

Update the dashboard: four energy banks

Subroutine: DIALS (Part 4 of 4)

Update the dashboard: shields, fuel, laser & cabin temp, altitude

Subroutine: PZW

Fetch the current dashboard colours, to support flashing

Subroutine: DILX

Update a bar-based indicator on the dashboard

Subroutine: DIL2

Update the roll or pitch indicator on the dashboard

Variable: TVT1

Palette data for space and the two dashboard colour schemes

Subroutine: IRQ1

The main screen-mode interrupt handler (IRQ1V points here)

Subroutine: ESCAPE

Launch our escape pod

Subroutine: TACTICS (Part 1 of 7)

Apply tactics: Process missiles, both enemy missiles and our own

Subroutine: TACTICS (Part 2 of 7)

Apply tactics: Escape pod, station, lone Thargon, safe-zone pirate

Subroutine: TACTICS (Part 3 of 7)

Apply tactics: Calculate dot product to determine ship's aim

Subroutine: TACTICS (Part 4 of 7)

Apply tactics: Check energy levels, maybe launch escape pod if low

Subroutine: TACTICS (Part 5 of 7)

Apply tactics: Consider whether to launch a missile at us

Subroutine: TACTICS (Part 6 of 7)

Apply tactics: Consider firing a laser at us, if aim is true

Subroutine: TACTICS (Part 7 of 7)

Apply tactics: Set pitch, roll, and acceleration

Subroutine: TAS1

Calculate K3 = (x_sign x_hi x_lo) - V(1 0)

Subroutine: HITCH

Work out if the ship in INWK is in our crosshairs

Subroutine: FRS1

Launch a ship straight ahead of us, below the laser sights

Subroutine: FRMIS

Fire a missile from our ship

Subroutine: ANGRY

Make a ship hostile

Subroutine: FR1

Display the "missile jammed" message

Subroutine: SESCP

Spawn an escape pod from the current (parent) ship

Subroutine: SFS1

Spawn a child ship from the current (parent) ship

Subroutine: SFS2

Move a ship in space along one of the coordinate axes

Subroutine: LL164

Make the hyperspace sound and draw the hyperspace tunnel

Subroutine: LAUN

Make the launch sound and draw the launch tunnel

Subroutine: HFS2

Draw the launch or hyperspace tunnel

Subroutine: STARS2

Process the stardust for the left or right view

Variable: SNE

Sine/cosine table

Subroutine: MU5

Set K(3 2 1 0) = (A A A A) and clear the C flag

Subroutine: MULT3

Calculate K(3 2 1 0) = (A P+1 P) * Q

Subroutine: MLS2

Calculate (S R) = XX(1 0) and (A P) = A * ALP1

Subroutine: MLS1

Calculate (A P) = ALP1 * A

Subroutine: SQUA

Clear bit 7 of A and calculate (A P) = A * A

Subroutine: SQUA2

Calculate (A P) = A * A

Subroutine: MU1

Copy X into P and A, and clear the C flag

Subroutine: MLU1

Calculate Y1 = y_hi and (A P) = |y_hi| * Q for Y-th stardust

Subroutine: MLU2

Calculate (A P) = |A| * Q

Subroutine: MULTU

Calculate (A P) = P * Q

Subroutine: MU11

Calculate (A P) = P * X

Subroutine: MU6

Set P(1 0) = (A A)

Subroutine: FMLTU2

Calculate A = K * sin(A)

Subroutine: FMLTU

Calculate A = A * Q / 256

Subroutine: Unused duplicate of MULTU

An unused duplicate of the MULTU routine

Subroutine: MLTU2

Calculate (A P+1 P) = (A ~P) * Q

Subroutine: MUT3

An unused routine that does the same as MUT2

Subroutine: MUT2

Calculate (S R) = XX(1 0) and (A P) = Q * A

Subroutine: MUT1

Calculate R = XX and (A P) = Q * A

Subroutine: MULT1

Calculate (A P) = Q * A

Subroutine: MULT12

Calculate (S R) = Q * A

Subroutine: TAS3

Calculate the dot product of XX15 and an orientation vector

Subroutine: MAD

Calculate (A X) = Q * A + (S R)

Subroutine: ADD

Calculate (A X) = (A P) + (S R)

Subroutine: TIS1

Calculate (A ?) = (-X * A + (S R)) / 96

Subroutine: DV42

Calculate (P R) = 256 * DELTA / z_hi

Subroutine: DV41

Calculate (P R) = 256 * DELTA / A

Subroutine: DVID4

Calculate (P R) = 256 * A / Q

Subroutine: DVID3B2

Calculate K(3 2 1 0) = (A P+1 P) / (z_sign z_hi z_lo)

Subroutine: cntr

Apply damping to the pitch or roll dashboard indicator

Subroutine: BUMP2

Bump up the value of the pitch or roll dashboard indicator

Subroutine: REDU2

Reduce the value of the pitch or roll dashboard indicator

Subroutine: ARCTAN

Calculate A = arctan(P / Q)

Variable: ACT

Arctan table

Subroutine: WARP

Perform an in-system jump

Subroutine: LASLI

Draw the laser lines for when we fire our lasers

Subroutine: PLUT

Flip the coordinate axes for the four different views

Subroutine: LOOK1

Initialise the space view

Subroutine: SIGHT

Draw the laser crosshairs

Subroutine: TT66

Clear the screen and set the current view type

Subroutine: TTX66

Clear the top part of the screen, draw a border box and configure the specified view

Subroutine: DELAY

Wait for a specified time, in 1/50s of a second

Subroutine: hm

Select the closest system and redraw the chart crosshairs

Subroutine: CLYNS

Clear the bottom three text rows of the space view

Subroutine: LYN

Clear most of a row of pixels

Subroutine: SCAN

Display the current ship on the scanner

Subroutine: WSCAN

Wait for the vertical sync

Subroutine: tnpr

Work out if we have space for a specific amount of cargo

Subroutine: TT20

Twist the selected system's seeds four times

Subroutine: TT54

Twist the selected system's seeds

Subroutine: TT146

Print the distance to the selected system in light years

Subroutine: TT60

Print a text token and a paragraph break

Subroutine: TTX69

Print a paragraph break

Subroutine: TT69

Set Sentence Case and print a newline

Subroutine: TT67

Print a newline

Subroutine: TT70

Display "MAINLY " and jump to TT72

Subroutine: spc

Print a text token followed by a space

Subroutine: TT25

Show the Data on System screen (red key f6)

Subroutine: TT24

Calculate system data from the system seeds

Subroutine: TT22

Show the Long-range Chart (red key f4)

Subroutine: TT15

Draw a set of crosshairs

Subroutine: TT14

Draw a circle with crosshairs on a chart

Subroutine: TT128

Draw a circle on a chart

Subroutine: TT219

Show the Buy Cargo screen (red key f1)

Subroutine: gnum

Get a number from the keyboard

Subroutine: TT208

Show the Sell Cargo screen (red key f2)

Subroutine: TT210

Show a list of current cargo in our hold, optionally to sell

Subroutine: TT213

Show the Inventory screen (red key f9)

Subroutine: TT214

Ask a question with a "Y/N?" prompt and return the response

Subroutine: TT16

Move the crosshairs on a chart

Subroutine: TT103

Draw a small set of crosshairs on a chart

Subroutine: TT123

Move galactic coordinates by a signed delta

Subroutine: TT105

Draw crosshairs on the Short-range Chart, with clipping

Subroutine: TT23

Show the Short-range Chart (red key f5)

Subroutine: TT81

Set the selected system's seeds to those of system 0

Subroutine: TT111

Set the current system to the nearest system to a point

Subroutine: hy6

Print a message to say there is no hyperspacing allowed inside the station

Subroutine: hyp

Start the hyperspace process

Subroutine: wW

Start a hyperspace countdown

Subroutine: Ghy

Perform a galactic hyperspace jump

Subroutine: jmp

Set the current system to the selected system

Subroutine: ee3

Print the hyperspace countdown in the top-left of the screen

Subroutine: pr6

Print 16-bit number, left-padded to 5 digits, no point

Subroutine: pr5

Print a 16-bit number, left-padded to 5 digits, and optional point

Subroutine: TT147

Print an error when a system is out of hyperspace range

Subroutine: prq

Print a text token followed by a question mark

Subroutine: TT151

Print the name, price and availability of a market item

Subroutine: TT152

Print the unit ("t", "kg" or "g") for a market item

Subroutine: TT162

Print a space

Subroutine: TT160

Print "t" (for tonne) and a space

Subroutine: TT161

Print "kg" (for kilograms)

Subroutine: TT16a

Print "g" (for grams)

Subroutine: TT163

Print the headers for the table of market prices

Subroutine: TT167

Show the Market Price screen (red key f7)

Subroutine: var

Calculate QQ19+3 = economy * |economic_factor|

Subroutine: hyp1

Process a jump to the system closest to (QQ9, QQ10)

Subroutine: GVL

Calculate the availability of market items

Subroutine: GTHG

Spawn a Thargoid ship and a Thargon companion

Subroutine: MJP

Process a mis-jump into witchspace

Subroutine: TT18

Try to initiate a jump into hyperspace

Subroutine: TT110

Launch from a station or show the front space view

Subroutine: TT114

Display either the Long-range or Short-range Chart

Subroutine: LCASH

Subtract an amount of cash from the cash pot

Subroutine: MCASH

Add an amount of cash to the cash pot

Subroutine: GCASH

Calculate (Y X) = P * Q * 4

Subroutine: GC2

Calculate (Y X) = (A P) * 4

Subroutine: EQSHP

Show the Equip Ship screen (red key f3)

Subroutine: dn

Print the amount of money we have left in the cash pot, then make a short, high beep and delay for 1 second

Subroutine: dn2

Make a short, high beep and delay for 1 second

Subroutine: eq

Subtract the price of equipment from the cash pot

Subroutine: prx

Return the price of a piece of equipment

Subroutine: qv

Print a menu of the four space views, for buying lasers

Variable: Authors' names

The authors' names and a copyright notice, buried in the code

Subroutine: cpl

Print the selected system name

Subroutine: cmn

Print the commander's name

Subroutine: ypl

Print the current system name

Subroutine: tal

Print the current galaxy number

Subroutine: fwl

Print fuel and cash levels

Subroutine: csh

Print the current amount of cash

Subroutine: plf

Print a text token followed by a newline

Subroutine: TT68

Print a text token followed by a colon

Subroutine: TT73

Print a colon

Subroutine: TT27

Print a text token

Subroutine: TT42

Print a letter in lower case

Subroutine: TT41

Print a letter according to Sentence Case

Subroutine: qw

Print a recursive token in the range 128-145

Subroutine: crlf

Tab to column 21 and print a colon

Subroutine: TT45

Print a letter in lower case

Subroutine: TT46

Print a character and switch to capitals

Subroutine: TT74

Print a character

Subroutine: TT43

Print a two-letter token or recursive token 0-95

Subroutine: ex

Print a recursive token

Subroutine: DOEXP

Draw an exploding ship

Subroutine: SOS1

Update the missile indicators, set up the planet data block

Subroutine: SOLAR

Set up various aspects of arriving in a new system

Subroutine: NWSTARS

Initialise the stardust field

Subroutine: nWq

Create a random cloud of stardust

Subroutine: WPSHPS

Clear the scanner, reset the ball line and sun line heaps

Subroutine: FLFLLS

Reset the sun line heap

Subroutine: DET1

Show or hide the dashboard (for when we die)

Subroutine: SHD

Charge a shield and drain some energy from the energy banks

Subroutine: DENGY

Drain some energy from the energy banks

Subroutine: COMPAS

Update the compass

Subroutine: SPS2

Calculate (Y X) = A / 10

Subroutine: SPS4

Calculate the vector to the space station

Subroutine: SP1

Draw the space station on the compass

Subroutine: SP2

Draw a dot on the compass, given the planet/station vector

Subroutine: DOT

Draw a dash on the compass

Subroutine: CPIX4

Draw a double-height dot on the dashboard

Subroutine: CPIX2

Draw a single-height dash on the dashboard

Subroutine: OOPS

Take some damage

Subroutine: SPS3

Copy a space coordinate from the K% block into K3

Subroutine: GINF

Fetch the address of a ship's data block into INF

Subroutine: NWSPS

Add a new space station to our local bubble of universe

Subroutine: NWSHP

Add a new ship to our local bubble of universe

Subroutine: NwS1

Flip the sign and double an INWK byte

Subroutine: ABORT

Disarm missiles and update the dashboard indicators

Subroutine: ABORT2

Set/unset the lock target for a missile and update the dashboard

Subroutine: ECBLB2

Start up the E.C.M. (light up the indicator, start the countdown and make the E.C.M. sound)

Subroutine: ECBLB

Light up the E.C.M. indicator bulb ("E") on the dashboard

Subroutine: SPBLB

Light up the space station indicator ("S") on the dashboard

Subroutine: BULB

Draw an indicator bulb on the dashboard

Variable: ECBT

The character bitmap for the E.C.M. indicator bulb

Variable: SPBT

The bitmap definition for the space station indicator bulb

Subroutine: MSBAR

Draw a specific indicator in the dashboard's missile bar

Subroutine: PROJ

Project the current ship or planet onto the screen

Subroutine: PL2

Remove the planet or sun from the screen

Subroutine: PLANET

Draw the planet or sun

Subroutine: PL9 (Part 1 of 3)

Draw the planet, with either an equator and meridian, or a crater

Subroutine: PL9 (Part 2 of 3)

Draw the planet's equator and meridian

Subroutine: PL9 (Part 3 of 3)

Draw the planet's crater

Subroutine: PLS1

Calculate (Y A) = nosev_x / z

Subroutine: PLS2

Draw a half-ellipse

Subroutine: PLS22

Draw an ellipse or half-ellipse

Subroutine: SUN (Part 1 of 4)

Draw the sun: Set up all the variables needed to draw the sun

Subroutine: SUN (Part 2 of 4)

Draw the sun: Start from the bottom of the screen and erase the old sun line by line

Subroutine: SUN (Part 3 of 4)

Draw the sun: Continue to move up the screen, drawing the new sun line by line

Subroutine: SUN (Part 4 of 4)

Draw the sun: Continue to the top of the screen, erasing the old sun line by line

Subroutine: CIRCLE

Draw a circle for the planet

Subroutine: CIRCLE2

Draw a circle (for the planet or chart)

Subroutine: WPLS2

Remove the planet from the screen

Subroutine: WP1

Reset the ball line heap

Subroutine: WPLS

Remove the sun from the screen

Subroutine: EDGES

Draw a horizontal line given a centre and a half-width

Subroutine: CHKON

Check whether any part of a circle appears on the extended screen

Subroutine: PL21

Return from a planet/sun-drawing routine with a failure flag

Subroutine: PLS3

Calculate (Y A P) = 222 * roofv_x / z

Subroutine: PLS4

Calculate CNT2 = arctan(P / A) / 4

Subroutine: PLS5

Calculate roofv_x / z and roofv_y / z

Subroutine: PLS6

Calculate (X K) = (A P+1 P) / (z_sign z_hi z_lo)

Subroutine: TT17

Scan the keyboard for cursor key or joystick movement

Subroutine: ping

Set the selected system to the current system

Subroutine: KS3

Set the SLSP ship line heap pointer after shuffling ship slots

Subroutine: KS1

Remove the current ship from our local bubble of universe

Subroutine: KS4

Remove the space station and replace it with the sun

Subroutine: KS2

Check the local bubble for missiles with target lock

Subroutine: KILLSHP

Remove a ship from our local bubble of universe

Variable: SFX

Sound data

Subroutine: RESET

Reset most variables

Subroutine: RES2

Reset a number of flight variables and workspaces

Subroutine: ZINF

Reset the INWK workspace and orientation vectors

Subroutine: msblob

Display the dashboard's missile indicators in green

Subroutine: me2

Remove an in-flight message from the space view

Subroutine: Ze

Initialise the INWK workspace to a hostile ship

Subroutine: DORND

Generate random numbers

Subroutine: Main game loop (Part 1 of 6)

Spawn a trader (a peaceful Cobra Mk III)

Subroutine: Main game loop (Part 2 of 6)

Call the main flight loop, and potentially spawn a trader, an asteroid, or a cargo canister

Subroutine: Main game loop (Part 3 of 6)

Potentially spawn a cop, particularly if we've been bad

Subroutine: Main game loop (Part 4 of 6)

Potentially spawn a lone bounty hunter, a Thargoid, or up to four pirates

Subroutine: Main game loop (Part 5 of 6)

Cool down lasers, make calls to update the dashboard

Subroutine: Main game loop (Part 6 of 6)

Process non-flight key presses (red function keys, docked keys)

Subroutine: TT102

Process function key, save key, hyperspace and chart key presses and update the hyperspace counter

Subroutine: BAD

Calculate how bad we have been

Subroutine: FAROF

Compare x_hi, y_hi and z_hi with 224

Subroutine: FAROF2

Compare x_hi, y_hi and z_hi with A

Subroutine: MAS4

Calculate a cap on the maximum distance to a ship

Subroutine: DEATH

Display the death screen

Subroutine: DEATH2

Reset most of the game and restart from the title screen

Subroutine: TT170

Main entry point for the Elite game code

Subroutine: BR1 (Part 1 of 2)

Show the "Load New Commander (Y/N)?" screen and start the game

Subroutine: QU5

Reset the current commander data block to the last saved commander

Subroutine: BR1 (Part 2 of 2)

Show the "Press Fire or Space, Commander" screen and start the game

Subroutine: BAY

Go to the docking bay (i.e. show the Status Mode screen)

Subroutine: TITLE

Display a title screen with a rotating ship and prompt

Subroutine: CHECK

Calculate the checksum for the last saved commander data block

Subroutine: TRNME

Copy the last saved commander's name from INWK to NA%

Subroutine: TR1

Copy the last saved commander's name from NA% to INWK

Subroutine: GTNME

Fetch the name of a commander file to save or load

Variable: RLINE

The OSWORD configuration block used to fetch a line of text from the keyboard

Subroutine: ZERO

Zero-fill pages &9, &A, &B, &C and &D

Subroutine: ZES1

Zero-fill the page whose number is in X

Subroutine: ZES2

Zero-fill a specific page

Subroutine: SVE

Save the commander file

Subroutine: QUS1

Save or load the commander file

Subroutine: LOD

Load a commander file

Subroutine: FX200

Set the behaviour of the ESCAPE and BREAK keys

Subroutine: SPS1

Calculate the vector to the planet and store it in XX15

Subroutine: TAS2

Normalise the three-coordinate vector in K3

Subroutine: NORM

Normalise the three-coordinate vector in XX15

Subroutine: RDKEY

Scan the keyboard for key presses

Subroutine: ECMOF

Switch off the E.C.M.

Subroutine: EXNO3

Make an explosion sound

Subroutine: SFRMIS

Add an enemy missile to our local bubble of universe

Subroutine: EXNO2

Process us making a kill

Subroutine: EXNO

Make the sound of a laser strike or ship explosion

Subroutine: BEEP

Make a short, high beep

Subroutine: NOISE

Make the sound whose number is in A

Subroutine: NO3

Make a sound from a prepared sound block

Subroutine: NOS1

Prepare a sound block

Variable: KYTB

Lookup table for in-flight keyboard controls

Subroutine: DKS1

Scan the keyboard for a flight key

Subroutine: CTRL

Scan the keyboard to see if CTRL is currently pressed

Subroutine: DKS4

Scan the keyboard to see if a specific key is being pressed

Subroutine: DKS2

Read the joystick position

Subroutine: DKS3

Toggle a configuration setting and emit a beep

Subroutine: DKJ1

Read joystick and flight controls

Subroutine: U%

Clear the key logger

Subroutine: DOKEY

Scan for the seven primary flight controls

Subroutine: DK4

Scan for pause, configuration and secondary flight keys

Subroutine: TT217

Scan the keyboard until a key is pressed

Subroutine: me1

Erase an old in-flight message and display a new one

Subroutine: ou2

Display "E.C.M.SYSTEM DESTROYED" as an in-flight message

Subroutine: ou3

Display "FUEL SCOOPS DESTROYED" as an in-flight message

Subroutine: MESS

Display an in-flight message

Subroutine: mes9

Print a text token, possibly followed by " DESTROYED"

Subroutine: OUCH

Potentially lose cargo or equipment following damage

Variable: QQ16

The two-letter token lookup table

Macro: ITEM

Macro definition for the market prices table

Variable: QQ23

Market prices table

Subroutine: TIDY

Orthonormalise the orientation vectors for a ship

Subroutine: TIS2

Calculate A = A / Q

Subroutine: TIS3

Calculate -(nosev_1 * roofv_1 + nosev_2 * roofv_2) / nosev_3

Subroutine: DVIDT

Calculate (P+1 A) = (A P) / Q

Subroutine: SHPPT

Draw a distant ship as a point rather than a full wireframe

Subroutine: LL5

Calculate Q = SQRT(R Q)

Subroutine: LL28

Calculate R = 256 * A / Q

Subroutine: LL38

Calculate (S A) = (S R) + (A Q)

Subroutine: LL51

Calculate the dot product of XX15 and XX16

Subroutine: LL9 (Part 1 of 12)

Draw ship: Check if ship is exploding, check if ship is in front

Subroutine: LL9 (Part 2 of 12)

Draw ship: Check if ship is in field of view, close enough to draw

Subroutine: LL9 (Part 3 of 12)

Draw ship: Set up orientation vector, ship coordinate variables

Subroutine: LL9 (Part 4 of 12)

Draw ship: Set visibility for exploding ship (all faces visible)

Subroutine: LL9 (Part 5 of 12)

Draw ship: Calculate the visibility of each of the ship's faces

Subroutine: LL9 (Part 6 of 12)

Draw ship: Calculate the visibility of each of the ship's vertices

Subroutine: LL61

Calculate (U R) = 256 * A / Q

Subroutine: LL62

Calculate 128 - (U R)

Subroutine: LL9 (Part 7 of 12)

Draw ship: Calculate the visibility of each of the ship's vertices

Subroutine: LL9 (Part 8 of 12)

Draw ship: Calculate the screen coordinates of visible vertices

Subroutine: LL9 (Part 9 of 12)

Draw ship: Draw laser beams if the ship is firing its laser at us

Subroutine: LL9 (Part 10 of 12)

Draw ship: Calculate the visibility of each of the ship's edges

Subroutine: LL9 (Part 11 of 12)

Draw ship: Add all visible edges to the ship line heap

Subroutine: LL9 (Part 12 of 12)

Draw ship: Draw all the visible edges from the ship line heap

Subroutine: LL118

Move a point along a line until it is on-screen

Subroutine: LL120

Calculate (Y X) = (S x1_lo) * XX12+2 or (S x1_lo) / XX12+2

Subroutine: LL123

Calculate (Y X) = (S R) / XX12+2 or (S R) * XX12+2

Subroutine: LL129

Calculate Q = XX12+2, A = S EOR XX12+3 and (S R) = |S R|

Subroutine: LL145 (Part 1 of 4)

Clip line: Work out which end-points are on-screen, if any

Subroutine: LL145 (Part 2 of 4)

Clip line: Work out if any part of the line is on-screen

Subroutine: LL145 (Part 3 of 4)

Clip line: Calculate the line's gradient

Subroutine: LL145 (Part 4 of 4)

Clip line: Call the routine in LL188 to do the actual clipping

Variable: checksum0

Checksum for the entire main game code

Variable: XX21

Ship blueprints lookup table

Macro: VERTEX

Macro definition for adding vertices to ship blueprints

Macro: EDGE

Macro definition for adding edges to ship blueprints

Macro: FACE

Macro definition for adding faces to ship blueprints

Variable: SHIP_SIDEWINDER

Ship blueprint for a Sidewinder

Variable: SHIP_VIPER

Ship blueprint for a Viper

Variable: SHIP_MAMBA

Ship blueprint for a Mamba

Variable: SHIP_COBRA_MK_3

Ship blueprint for a Cobra Mk III

Variable: SHIP_THARGOID

Ship blueprint for a Thargoid mothership

Variable: SHIP_CORIOLIS

Ship blueprint for a Coriolis space station

Variable: SHIP_MISSILE

Ship blueprint for a missile

Variable: SHIP_ASTEROID

Ship blueprint for an asteroid

Variable: SHIP_CANISTER

Ship blueprint for a cargo canister

Variable: SHIP_THARGON

Ship blueprint for a Thargon

Variable: SHIP_ESCAPE_POD

Ship blueprint for an escape pod

Variable: SHIP_PYTHON

Ship blueprint for a Python

Variable: SVN

The "saving in progress" flag

Variable: VEC

The original value of the IRQ1 vector

Workspace: ZP (Big Code file)

Important variables used by the loader

Subroutine: LBL (Big Code file)

Checksum the two pages of code that were copied from UU% to LE%