Compare code for features of 6502 Second Processor Elite

The following table shows code variations that are unique to the 6502 Second Processor version.

Click on a name to see all the code differences for that part of the codebase, or click on an individual variation to focus on that particular feature.

Name	Comments
acorn Demo	The opening scroll text in the Executive version's demo says "PIZZASOFT PRESENTS" instead of "ACORNSOFT PRESENTS". See the code containing this feature
BELL Sound	If speech is enabled in the Executive version, only the BELL routine makes a standard system beep (the CHPR routine no longer does). See the code variation for this feature
BR1 (Part 1 of 2) Start and end	If speech is enabled on the Executive version, it will say "Elite" when the title screen is displayed. See the code variation for this feature Pressing TAB in the title screen of the 6502SP version will start the demo. See the code variation for this feature
CHK Save and load	The Executive version contains a maxed-out default commander, which has a different checksum. See the code variation for this feature
CHK2 Save and load	The Executive version contains a maxed-out default commander, which has a different second checksum byte. See the code variation for this feature
CHPR Text	If speech is enabled in the Executive version, the main character routine at CHPR doesn't make standard system beeps any more (though the BELL routine still does). See the code containing this feature
DEMON Demo	The demo in the Executive version shows an extra bit of scroll text before the authors' names: "THE EXECUTIVE VERSION". See the code containing this feature
DK4 Keyboard	The Executive version supports two new configuration keys when paused: "@" toggles infinite jump range, while ":" toggles speech. See the code variation for this feature The 6502SP version lets you take screenshots, by pressing "D" when the game is paused. See the code variation for this feature
E% Drawing ships	The 6502SP version stores the Elite logo as a ship, with its own NEWB flags (none of which are set). See the code variation for this feature
EQSHP Equipment	In the 6502SP version, you can send the Equip Ship screen to the printer by pressing CTRL-f3. See the code variation for this feature
executive Demo	The Executive version's demo includes an extra bit of text: "THE EXECUTIVE VERSION". See the code containing this feature
Firebird Copy protection	The Executive version contains an extra string, "Firebird", buried in the code, though it isn't used anywhere. See the code containing this feature
FONT% Text	The Executive version uses a unique font, which is based on the 1960s Westminster font (it's similar to the machine-readable font on cheques - "retro-futuristic" is probably what we'd call it these days). See the code variation for this feature
hyp Flight	If infinite jump range is enabled in the Executive version, you can jump to anywhere in the entire galaxy. See the code variation for this feature
K% Workspaces	The Executive version has a different memory map to the other 6502SP versions, with the K% workspace at &8500 instead of &8200. See the code variation for this feature
LP Demo	The Executive version has a different memory map to the other 6502SP versions, with the LP workspace at &8900 instead of &8600. See the code containing this feature
Main flight loop (Part 15 of 16) Main loop	If speech is enabled on the Executive version, it will say "Energy low" every time the "ENERGY LOW,SIR" message flashes on-screen. See the code variation for this feature
Main game loop (Part 5 of 6) Main loop	The 6502SP version supports a printer (holding CTRL when pressing a red function key will send that screen to the printer). As part of this, the code sends line feeds, which is mainly notable for using the longest label name in the entire source code: dontdolinefeedontheprinternow. See the code variation for this feature
MJP Flight	If speech is enabled on the Executive version, it will say "Oh shit, it's a mis-jump" when we mis-jump into witchspace (this happens with both accidental and manually triggered mis-jumps). See the code variation for this feature
NA% / NA2% Save and load	The Executive version contains a maxed-out default commander, with a different name: Firebud instead of Jameson (the name is presumably a seven-character riff on "Firebird", the publishers of the non-Acorn versions of Elite). See the code variation for this feature The Executive version has bit 7 of the COK competition flags set, to indicate that this commander file has been tampered with (which it has, of course). See the code variation for this feature
Parasite variables Workspaces	The Executive version has two extra variables for storing the new configuration options. See the code containing this feature
QQ18 Text	The Executive version displays distances in the Status and galaxy charts as "L.Y." rather than "LIGHT YEARS" (this saves space in the token table so "SIR" can be added to the tokens for low low and incoming missiles). See the code variation for this feature When energy is low in the Executive version, it shows the in-flight message "ENERGY LOW,SIR", rather than just showing "ENERGY LOW". See the code variation for this feature If you have bought an energy unit, then most versions will show it on the Inventory screen as "Energy Unit", but in the source disc variant of the 6502SP version, it is shown as "Extra Energy Unit" (though it's still "Energy Unit" in the Acornsoft SNG45 release of the game). See the code variation for this feature When missiles are being fired at us in the Executive version, it shows the in-flight message "INCOMING MISSILE,SIR", rather than just showing "INCOMING MISSILE". See the code variation for this feature
RUTOK Text	The Executive version has an extra token for overriding the system description for Riedquat: "Only this executive version has the @ toggle". See the code variation for this feature
SFRMIS Tactics	If speech is enabled on the Executive version, it will say "Incoming missile" every time the "INCOMING MISSILE,SIR" message flashes on-screen. See the code variation for this feature
SP2 Dashboard	The compass on the cassette, disc and Master version uses yellow when the target is in front of us, while the 6502SP version uses white (and so does the Electron version, but only because it's monochrome). See the code variation for this feature
SPEECH Sound	The Executive version supports speech, and the four phrases are stored in the table at SPEECH. See the code containing this feature
STARTUP / SETINTS Loader	The Executive version support speech via the Watford Electronics Beeb Speech Synthesiser, which attaches to the user port, so unlike the other versions, the loader doesn't disable the 6522 User VIA. See the code variation for this feature The 6502SP version implements a hook that enables you to add arbitrary code to the start-up process. The code needs to be inserted at location &0B00 in the I/O processor, and it needs to start with the characters "TINA". See the code variation for this feature
STATUS Status	In the 6502SP version, you can send the Status Mode screen to the printer by pressing CTRL-f8. See the code variation for this feature
TALK Sound	The Executive version supports speech, via the TALK routine. Speech will work only if you have a Watford Electronics Beeb Speech Synthesiser fitted and enable speech in the configuration options. See the code containing this feature
TITLE Start and end	The 6502SP version adds two loop counters to the title screen so we can start the demo after a certain period on the title screen. See the code variation for this feature The 6502SP version only scans for key presses every four iterations on the title screen (as opposed to every iteration in the other versions), so you have to hold down "Y", "N" or Space for noticeably longer to load a commander or start the game. See the code variation for this feature
TRADEMODE Drawing the screen	The 6502SP version implements printable trade screens by checking whether CTRL is being pressed before displaying the relevant screen. See the code variation for this feature
true3 Demo	The Executive version's demo contains the scroll text "CONGRATULATIONS ON OBTAINING A COPY OF THIS ELUSIVE PRODUCT.", which is shown in place of the "GALAXY IS IN TURMOIL" text. See the code containing this feature
TT167 Market	In the 6502SP version, you can send the Market Price screen to the printer by pressing CTRL-f7. See the code variation for this feature
TT170 Start and end	The Executive version immediately starts the demo once the game has loaded (though just like the other 6502SP versions, you can still bring it up manually using TAB from the title screen, and it will automatically start after a period of inactivity). See the code variation for this feature
TT18 Flight	If infinite jump range is enabled in the Executive version, no fuel is used for jumping. See the code variation for this feature
TT208 Market	In the 6502SP version, you can send the Sell Cargo screen to the printer by pressing CTRL-f2. See the code variation for this feature
TT213 Market	In the 6502SP version, you can send the Inventory screen to the printer by pressing CTRL-f9. See the code variation for this feature
TT219 Market	In the 6502SP version, you can send the Buy Cargo screen to the printer by pressing CTRL-f1. See the code variation for this feature
TT25 Universe	In the 6502SP version, you can send the Data on System screen to the printer by pressing CTRL-f6. See the code variation for this feature
XX21 Drawing ships	The 6502SP version has an extra ship definition for the Elite logo that appears in the demo, but it doesn't turn up in-game, not surprisingly. See the code variation for this feature