This index contains every variable that appears in the source code for the Apple II version of Elite, grouped by category. A variable is defined as a labelled memory location that is used for storing data, and this list includes both variables that are defined in workspaces, and variables that are declared within the body of the source code.
- Dashboard
- Drawing lines
- Drawing pixels
- Drawing ships
- Drawing the screen
- Equipment
- Keyboard
- Loader
- Market
- Maths (Arithmetic)
- Maths (Geometry)
- Missions
- Save and load
- Status
- Text
- Universe
- Utility routines
- Workspace variables
Dashboard
| |
| dialc1 | The colour for each indicator for values that are below the threshold in dialle |
| dialc2 | The colour for each indicator for values that are on or above the threshold in dialle |
| dialle | The threshold value for each indicator that defines low and high values, and therefore the low and high colours for the indicator |
| dialY | The screen y-coordinate of the top-left corner of each indicator |
| ECBT | The character bitmap for the E.C.M. indicator bulb |
| msloc | The screen x-coordinates of the four missile indicators on the dashboard |
| SPBT | The bitmap definition for the space station indicator bulb |
Drawing lines
| |
| beamcol | An unused table of laser colours |
| BOMBPOS | A set of x-coordinates that are used as the basis for the energy bomb's zig-zag lightning bolt |
| BOMBTBX | This is where we store the x-coordinates for the energy bomb's zig-zag lightning bolt |
| BOMBTBY | This is where we store the y-coordinates for the energy bomb's zig-zag lightning bolt |
| MASKT | High-resolution pixel bytes for drawing continuous lines of solid colour |
| sightcol | Colours for the crosshair sights on the different laser types |
| TWFL | Ready-made pixel bytes for the left end of a horizontal line |
| TWFR | Ready-made character rows for the right end of a horizontal line in the space view |
Drawing pixels
| |
| TWOS | Ready-made bytes for drawing one-pixel dots in the space view |
| TWOS2 | Ready-made two-bit pixel bytes for plotting colour pixels |
| TWOS3 | Ready-made two-pixel and three-pixel bytes in white, with an extra byte to cater for overflow into the next pixel byte |
Drawing ships
| |
| E% (Game data) | Ship blueprints default NEWB flags |
| exlook | A table to shift X left by one place when X is 0 or 1 |
| scacol | Ship colours on the scanner |
| SHIP_ADDER (Game data) | Ship blueprint for an Adder |
| SHIP_ANACONDA (Game data) | Ship blueprint for an Anaconda |
| SHIP_ASP_MK_2 (Game data) | Ship blueprint for an Asp Mk II |
| SHIP_ASTEROID (Game data) | Ship blueprint for an asteroid |
| SHIP_BOA (Game data) | Ship blueprint for a Boa |
| SHIP_BOULDER (Game data) | Ship blueprint for a boulder |
| SHIP_CANISTER (Game data) | Ship blueprint for a cargo canister |
| SHIP_COBRA_MK_1 (Game data) | Ship blueprint for a Cobra Mk I |
| SHIP_COBRA_MK_3 (Game data) | Ship blueprint for a Cobra Mk III |
| SHIP_COBRA_MK_3_P (Game data) | Ship blueprint for a Cobra Mk III (pirate) |
| SHIP_CONSTRICTOR (Game data) | Ship blueprint for a Constrictor |
| SHIP_CORIOLIS (Game data) | Ship blueprint for a Coriolis space station |
| SHIP_DODO (Game data) | Ship blueprint for a Dodecahedron ("Dodo") space station |
| SHIP_ESCAPE_POD (Game data) | Ship blueprint for an escape pod |
| SHIP_FER_DE_LANCE (Game data) | Ship blueprint for a Fer-de-Lance |
| SHIP_GECKO (Game data) | Ship blueprint for a Gecko |
| SHIP_KRAIT (Game data) | Ship blueprint for a Krait |
| SHIP_MAMBA (Game data) | Ship blueprint for a Mamba |
| SHIP_MISSILE (Game data) | Ship blueprint for a missile |
| SHIP_MORAY (Game data) | Ship blueprint for a Moray |
| SHIP_PLATE (Game data) | Ship blueprint for an alloy plate |
| SHIP_PYTHON (Game data) | Ship blueprint for a Python |
| SHIP_PYTHON_P (Game data) | Ship blueprint for a Python (pirate) |
| SHIP_ROCK_HERMIT (Game data) | Ship blueprint for a rock hermit (asteroid) |
| SHIP_SHUTTLE (Game data) | Ship blueprint for a Shuttle |
| SHIP_SIDEWINDER (Game data) | Ship blueprint for a Sidewinder |
| SHIP_SPLINTER (Game data) | Ship blueprint for a splinter |
| SHIP_THARGOID (Game data) | Ship blueprint for a Thargoid mothership |
| SHIP_THARGON (Game data) | Ship blueprint for a Thargon |
| SHIP_TRANSPORTER (Game data) | Ship blueprint for a Transporter |
| SHIP_VIPER (Game data) | Ship blueprint for a Viper |
| SHIP_WORM (Game data) | Ship blueprint for a Worm |
| XX21 (Game data) | Ship blueprints lookup table |
Drawing the screen
| |
| cellocl | Lookup table for converting a text row number to the address of that row in text screen memory (low byte) |
| SCTBH | Lookup table for converting a character row number to the address of the top pixel line in that character row (high byte) |
| SCTBH2 | Lookup table for converting a character row number to the address of the bottom pixel line in that character row (high byte) |
| SCTBL | Lookup table for converting a character row number to the address of the top or bottom pixel line in that character row (low byte) |
| SCTBX1 | Lookup table for converting a pixel x-coordinate to the bit number within the pixel row byte that corresponds to this pixel |
| SCTBX2 | Lookup table for converting a pixel x-coordinate to the byte number in the pixel row that corresponds to this pixel |
Equipment
| |
| PRXS | Equipment prices |
Keyboard
| |
| KTRAN | An unused key logger buffer that's left over from the 6502 Second Processor version of Elite |
| KYTB | Lookup table for in-flight keyboard controls |
| TGINT | The keys used to toggle configuration settings when the game is paused |
Loader
| |
| fileSize (Loader) | The file size of the file we are loading |
| skipBytes (Loader) | The number of bytes to skip at the start of the file that we are loading |
| trackSector (Loader) | The track/sector list for the file we are loading |
| tslIndex (Loader) | The index of the current entry in the track/sector list, as we work our way through the list |
Market
| |
| QQ23 | Market prices table |
Maths (Arithmetic)
| |
| alogh | Binary antilogarithm table |
| log | Binary logarithm table (high byte) |
| logL | Binary logarithm table (low byte) |
Maths (Geometry)
| |
| SNE (Game data) | Sine/cosine table |
Missions
| |
| SPMASK | Masks for updating sprite bits in VIC+$10 for the top bit of the 9-bit x-coordinates of the Trumble sprites |
| TRIBDIR | The low byte of the four 16-bit directions in which Trumble sprites can move |
| TRIBDIRH | The high byte of the four 16-bit directions in which Trumble sprites can move |
| TRIBMA | A table for converting the number of Trumbles in the hold into a sprite-enable flag to use with VIC register $15 |
| TRIBTA | A table for converting the number of Trumbles in the hold into a number of sprites in the range 0 to 6 |
Save and load
| |
| armtab | Phase-on time table in 100-usec intervals |
| armtab (Loader) | Phase-on time table in 100-usec intervals |
| armtb2 | Phase-off time table in 100-usec intervals |
| armtb2 (Loader) | Phase-off time table in 100-usec intervals |
| CHK | First checksum byte for the saved commander data file |
| CHK2 | Second checksum byte for the saved commander data file |
| CHK3 | Third checksum byte for the saved commander data file |
| comnam | Storage for the commander filename, padded out with spaces to a fixed size of 30 characters, for the rfile and wfile routines |
| comnam (Loader) | The filename of the first file to load, padded out with spaces to a fixed size of 30 characters for the rfile routine |
| DERR1 | The error message for when a disk is write protected |
| DERR2 | The error message for when a disk is full |
| DERR3 | The error message for when a disk catalog is full |
| DERR4 | The error message for when there is a disk I/O error |
| DERR5 | The error message for when a file is not found |
| ERTAB | A lookup table for the five disk error messages |
| filename (Loader) | The filename of the second file to load |
| NA% | The data block for the last saved commander |
| NA2% | The data block for the default commander |
| oldlong | Contains the length of the last saved commander name |
| rtable | 64 disk nibbles of "6-and-2" Read Translate Table |
| rtable (Loader) | 64 disk nibbles of "6-and-2" Read Translate Table |
| S1% | The drive and directory number used when saving or loading a commander file |
| scttab | Lookup table to translate logical (requested) sector number to physical sector number |
| scttab (Loader) | Lookup table to translate logical (requested) sector number to physical sector number |
| thislong | Contains the length of the most recently entered commander name |
| wtable | 6-bit to 7-bit nibble conversion table |
Status
| |
| KWH% (Game data) | Integer number of kills awarded for destroying each type of ship |
| KWL% (Game data) | Fractional number of kills awarded for destroying each type of ship |
Text
| |
| DTW1 | A mask for applying the lower case part of Sentence Case to extended text tokens |
| DTW2 | A flag that indicates whether we are currently printing a word |
| DTW3 | A flag for switching between standard and extended text tokens |
| DTW4 | Flags that govern how justified extended text tokens are printed |
| DTW5 | The size of the justified text buffer at BUF |
| DTW6 | A flag to denote whether printing in lower case is enabled for extended text tokens |
| DTW8 | A mask for capitalising the next letter in an extended text token |
| JMTB | The extended token table for jump tokens 1-32 (DETOK) |
| MTIN | Lookup table for random tokens in the extended token table (0-37) |
| QQ16 | The two-letter token lookup table |
| QQ18 (Game data) | The recursive token table for tokens 0-148 |
| RLINE | The OSWORD configuration block used to fetch a line of text from the keyboard |
| RUGAL (Game data) | The criteria for systems with extended description overrides |
| RUPLA (Game data) | System numbers that have extended description overrides |
| RUTOK (Game data) | The second extended token table for recursive tokens 0-26 (DETOK3) |
| TENS | A constant used when printing large numbers in BPRNT |
| TKN1 (Game data) | The first extended token table for recursive tokens 0-255 (DETOK) |
| TKN2 | The extended two-letter token lookup table |
Universe
| |
| spasto | Contains the address of the Coriolis space station's ship blueprint |
| UNIV | Table of pointers to the local universe's ship data blocks |
Utility routines
| |
| brkd | A flag that indicates whether a system error has occurred |
| F% | Denotes the end of the main game code, from ELITE A to ELITE K |
| G% | Denotes the start of the main game code, from ELITE A to ELITE K |
Workspace variables
| |
| ALP1 | Magnitude of the roll angle alpha, i.e. |alpha|, which is a positive value between 0 and 31 |
| ALP2 | Bit 7 of ALP2 = sign of the roll angle in ALPHA |
| ALPHA | The current roll angle alpha, which is reduced from JSTX to a sign-magnitude value between -31 and +31 |
| ALTIT | Our altitude above the surface of the planet or sun |
| ASH | Aft shield status |
| atemp0 | Temporary storage for the read/write status bit |
| atemp0 (Loader) | Temporary storage for the read/write status bit |
| auto | Docking computer activation status |
| AVL | Market availability in the current system |
| BALI | The progress of the Star Wars scroll text as it scrolls, from 254 (off the bottom of the screen) to 2 (fully scrolled). Can also be thought of as a measure of how much of the scroll text has yet to appear on-screen |
| BET1 | The magnitude of the pitch angle beta, i.e. |beta|, which is a positive value between 0 and 8 |
| BET2 | Bit 7 of BET2 = sign of the pitch angle in BETA |
| BETA | The current pitch angle beta, which is reduced from JSTY to a sign-magnitude value between -8 and +8 |
| bitmap | Bit map of free sectors in track 0, at byte #56 ($38) in the buffer |
| bitmap (Loader) | Bit map of free sectors in track 0, at byte #56 ($38) in the buffer |
| BOMB | Energy bomb |
| boxsize | This byte appears to be unused |
| BST | Fuel scoops (BST stands for "barrel status") |
| buffer | A 256-byte sector buffer, where we can load sectors from the disk, such as the track/sector list, or the commander file contents |
| buffer (Loader) | A 256-byte sector buffer, where we can load sectors from the disk, such as the track/sector list, or the commander file contents |
| buffr2 | A 342-byte buffer for storing data in the 6-bit nibble format |
| buffr2 (Loader) | A 342-byte buffer for storing data in the 6-bit nibble format |
| CABTMP | Cabin temperature |
| CASH | Our current cash pot |
| CNT | Temporary storage, typically used for storing the number of iterations required when looping |
| CNT2 | Temporary storage, used in the planet-drawing routine to store the segment number where the arc of a partial circle should start |
| COK | Flags used to generate the competition code |
| COL | Temporary storage, used to store colour information when drawing pixels in the dashboard |
| COMC | The shape (i.e. thickness) of the dot on the compass |
| COMX | The x-coordinate of the compass dot |
| COMY | The y-coordinate of the compass dot |
| CRGO | Our ship's cargo capacity |
| curtrk | The current track before performing a seek in the RWTS code |
| curtrk (Loader) | The current track before performing a seek in the RWTS code |
| DAMP | Keyboard damping configuration setting |
| de | Equipment destruction flag |
| DELT4 | Our current speed * 64 as a 16-bit value |
| DELTA | Our current speed, in the range 1-40 |
| DFLAG | This byte appears to be unused |
| dialc | Current dashboard indicator colours |
| dials | Current dashboard indicator values |
| dirtrk | The direction in which we are searching tracks for free sectors in the getsct routine (+1 or -1) |
| dirtrk (Loader) | The direction in which we are searching tracks for free sectors in the getsct routine (+1 or -1) |
| DISK | The configuration setting for toggle key "T", which isn't actually used but is still updated by pressing "T" while the game is paused. This is a configuration option from the Commodore 64 version of Elite that lets you switch between tape and disk |
| distaway | Used to store the nearest distance of the rotating ship on the title screen |
| DJD | Keyboard auto-recentre configuration setting |
| DKCMP | Docking computer |
| DL | This byte is unused in this version of Elite (it is used to store the vertical sync flag in the BBC Micro versions) |
| DLY | In-flight message delay |
| DNOIZ | Sound on/off configuration setting |
| dontclip | This is set to 0 in the RES2 routine, but the value is never actually read (this is left over from the Commodore 64 version of Elite) |
| ECM | E.C.M. system |
| ECMA | The E.C.M. countdown timer, which determines whether an E.C.M. system is currently operating: |
| ECMP | Our E.C.M. status |
| ENERGY | Energy bank status |
| ENGY | Energy unit |
| ESCP | Escape pod |
| EV | The "extra vessels" spawning counter |
| filsct | The sector for the commander file's contents |
| filsct (Loader) | The sector for the commander file's contents |
| filtrk | The track for the commander file's contents |
| filtrk (Loader) | The track for the commander file's contents |
| fireButtonMask | This value is applied to the joystick fire button soft switches in the TITLE routine, where it disables the ability to configure joysticks by pressing a fire button |
| FIST | Our legal status (FIST stands for "fugitive/innocent status"): |
| FLAG | A flag that's used to define whether this is the first call to the ball line routine in BLINE, so it knows whether to wait for the second call before storing segment data in the ball line heap |
| FLH | Flashing console bars configuration setting |
| fretrk | The number of the last track that we checked for a free sector in the getsct routine |
| fretrk (Loader) | The number of the last track that we checked for a free sector in the getsct routine |
| FRIN | Slots for the ships in the local bubble of universe |
| fromAddr (Loader) | The address to copy from in the CopyMemory routine |
| frump | Used to store the number of particles in the explosion cloud, though the number is never actually used |
| FSH | Forward shield status |
| GCNT | The number of the current galaxy (0-7) |
| GHYP | Galactic hyperdrive |
| GNTMP | Laser temperature (or "gun temperature") |
| gov | The current system's government type (0-7) |
| HFX | This flag is unused in this version of Elite. In the other versions, setting HFX to a non-zero value makes the hyperspace rings multi-coloured, but that effect is not used in this version |
| idfld | Storage for four bytes used in the RDADR16 routine: |
| idfld (Loader) | Storage for four bytes used in the RDADR16 routine: |
| INF | Temporary storage, typically used for storing the address of a ship's data block, so it can be copied to and from the internal workspace at INWK |
| INWK | The zero-page internal workspace for the current ship data block |
| JSTE | Reverse both joystick channels configuration setting |
| JSTK | Keyboard or joystick configuration setting |
| JSTX | Our current roll rate |
| JSTY | Our current pitch rate |
| JUNK | The amount of junk in the local bubble |
| K | Temporary storage, used in a number of places |
| K2 | Temporary storage, used in a number of places |
| K3 | Temporary storage, used in a number of places |
| K4 | Temporary storage, used in a number of places |
| K5 | Temporary storage used to store segment coordinates across successive calls to BLINE, the ball line routine |
| K6 | Temporary storage, typically used for storing coordinates during vector calculations |
| KEYLOOK | KEYLOOK, KLO, KL and thiskey all share the same address |
| KL | The following bytes implement a key logger that enables Elite to scan for concurrent key presses of the primary flight keys, plus a secondary flight key |
| KLO | KEYLOOK, KLO, KL and thiskey all share the same address |
| KY1 | "?" is being pressed (slow down) |
| KY12 | "B" is being pressed (energy bomb) |
| KY13 | ESCAPE is being pressed (launch escape pod) |
| KY14 | "T" is being pressed (target missile) |
| KY15 | "U" is being pressed (unarm missile) |
| KY16 | "M" is being pressed (fire missile) |
| KY17 | "E" is being pressed (activate E.C.M.) |
| KY18 | "J" is being pressed (in-system jump) |
| KY19 | "C" is being pressed (activate docking computer) |
| KY2 | Space is being pressed (speed up) |
| KY20 | "P" is being pressed (deactivate docking computer) |
| KY3 | "<" is being pressed (roll left) |
| KY4 | ">" is being pressed (roll right) |
| KY5 | "X" is being pressed (pull up) |
| KY6 | "S" is being pressed (pitch down) |
| KY7 | "A" is being pressed (fire lasers) |
| LAS | Contains the laser power of the laser fitted to the current space view (or 0 if there is no laser fitted to the current view) |
| LAS2 | Laser power for the current laser |
| LASCT | The laser pulse count for the current laser |
| LASER | The specifications of the lasers fitted to each of the four space views: |
| LASX | The x-coordinate of the tip of the laser line |
| LASY | The y-coordinate of the tip of the laser line |
| LSNUM | The pointer to the current position in the ship line heap as we work our way through the new ship's edges (and the corresponding old ship's edges) when drawing the ship in the main ship-drawing routine at LL9 |
| LSNUM2 | The size of the existing ship line heap for the ship we are drawing in LL9, i.e. the number of lines in the old ship that is currently shown on-screen and which we need to erase |
| LSO | The ship line heap for the space station (see NWSPS) and the sun line heap (see SUN) |
| LSP | The ball line heap pointer, which contains the number of the first free byte after the end of the LSX2 and LSY2 heaps |
| LSX | LSX contains the status of the sun line heap at LSO |
| LSX2 | The ball line heap for storing x-coordinates |
| LSY2 | The ball line heap for storing y-coordinates |
| MANY | The number of ships of each type in the local bubble of universe |
| MCH | The text token number of the in-flight message that is currently being shown, and which will be removed by the me2 routine when the counter in DLY reaches zero |
| MCNT | The main loop counter |
| messXC | Temporary storage, used to store the text column of the in-flight message in MESS, so it can be erased from the screen at the correct time |
| MJ | Are we in witchspace (i.e. have we mis-jumped)? |
| MSAR | The targeting state of our leftmost missile |
| mscol | Current missile indicator colours |
| MSTG | The current missile lock target |
| mtimeh | The motor on time (high byte) |
| mtimeh (Loader) | The motor on time (high byte) |
| mtimel | The motor on time (low byte) |
| mtimel (Loader) | The motor on time (low byte) |
| MULIE | A flag to record whether the RESET routine is being being called from within the TITLE routine, when the title screen is being displayed, as we don't want to stop the title music from playing when this is the case |
| NAME | The current commander name |
| NEWB | The ship's "new byte flags" (or NEWB flags) |
| newzp | This is used by the STARS2 routine for storing the stardust particle's delta_x value |
| NOMSL | The number of missiles we have fitted (0-4) |
| NOSTM | The number of stardust particles shown on screen, which is 12 (#NOST) for normal space, and 3 for witchspace |
| P | Temporary storage, used in a number of places |
| PATG | Configuration setting to show the author names on the start-up screen and enable manual hyperspace mis-jumps |
| Q | Temporary storage, used in a number of places |
| QQ0 | The current system's galactic x-coordinate (0-256) |
| QQ1 | The current system's galactic y-coordinate (0-256) |
| QQ10 | The galactic y-coordinate of the crosshairs in the galaxy chart (and, most of the time, the selected system's galactic y-coordinate) |
| QQ11 | The type of the current view: |
| QQ12 | Our "docked" status |
| QQ14 | Our current fuel level (0-70) |
| QQ15 | The three 16-bit seeds for the selected system, i.e. the one in the crosshairs in the Short-range Chart |
| QQ17 | Contains a number of flags that affect how text tokens are printed, particularly capitalisation: |
| QQ19 | Temporary storage, used in a number of places |
| QQ2 | The three 16-bit seeds for the current system, i.e. the one we are currently in |
| QQ20 | The contents of our cargo hold |
| QQ21 | The three 16-bit seeds for the current galaxy |
| QQ22 | The two hyperspace countdown counters |
| QQ24 | Temporary storage, used to store the current market item's price in routine TT151 |
| QQ25 | Temporary storage, used to store the current market item's availability in routine TT151 |
| QQ26 | A random value used to randomise market data |
| QQ28 | The current system's economy (0-7) |
| QQ29 | Temporary storage, used in a number of places |
| QQ3 | The selected system's economy (0-7) |
| QQ4 | The selected system's government (0-7) |
| QQ5 | The selected system's tech level (0-14) |
| QQ6 | The selected system's population in billions * 10 (1-71), so the maximum population is 7.1 billion |
| QQ7 | The selected system's productivity in M CR (96-62480) |
| QQ8 | The distance from the current system to the selected system in light years * 10, stored as a 16-bit number |
| QQ9 | The galactic x-coordinate of the crosshairs in the galaxy chart (and, most of the time, the selected system's galactic x-coordinate) |
| R | Temporary storage, used in a number of places |
| RAND | Four 8-bit seeds for the random number generation system implemented in the DORND routine |
| RAT | Used to store different signs depending on the current space view, for use in calculating stardust movement |
| RAT2 | Temporary storage, used to store the pitch and roll signs when moving objects and stardust |
| recals | The maximum number of arm recalibrations to 2 |
| recals (Loader) | The maximum number of arm recalibrations to 2 |
| S | Temporary storage, used in a number of places |
| safehouse | Backup storage for the seeds for the selected system |
| SC | Screen address (low byte) |
| SCH | Screen address (high byte) |
| sector | Storage for a sector number in the RWTS code |
| sector (Loader) | Storage for a sector number in the RWTS code |
| seeks | The maximum number of seeks |
| seeks (Loader) | The maximum number of seeks |
| slot16 | The slot number containing the disk controller card, multiplied by 16 to move the slot number into the top nibble (so the value is $x0 for slot x) |
| slot16 (Loader) | The slot number containing the disk controller card, multiplied by 16 to move the slot number into the top nibble (so the value is $x0 for slot x) |
| SLSP | The address of the bottom of the ship line heap |
| SSPR | "Space station present" flag |
| stkptr | Temporary storage for the stack pointer when running the RWTS low-level disk access routines |
| STP | The step size for drawing circles |
| SUNX | The 16-bit x-coordinate of the vertical centre axis of the sun (which might be off-screen) |
| SVC | The save count |
| SWAP | Temporary storage, used to store a flag that records whether or not we had to swap a line's start and end coordinates around when clipping the line in routine LL145 (the flag is used in places like BLINE to swap them back) |
| SX | This is where we store the x_hi coordinates for all the stardust particles |
| SXL | This is where we store the x_lo coordinates for all the stardust particles |
| SY | This is where we store the y_hi coordinates for all the stardust particles |
| SYL | This is where we store the y_lo coordinates for all the stardust particles |
| SZ | This is where we store the z_hi coordinates for all the stardust particles |
| SZL | This is where we store the z_lo coordinates for all the stardust particles |
| T | Temporary storage, used in a number of places |
| T1 | Temporary storage, used in a number of places |
| T2 | This byte appears to be unused |
| T3 | This byte appears to be unused |
| T4 | This byte appears to be unused |
| TALLY | Our combat rank |
| TALLYL | Combat rank fraction |
| tek | The current system's tech level (0-14) |
| text | A flag to record the type of screen mode that's currently being used: |
| TGT | Temporary storage, typically used as a target value for counters when drawing explosion clouds and partial circles |
| thiskey | The following bytes implement a key logger that enables Elite to scan for concurrent key presses of the primary flight keys, plus a secondary flight key |
| toAddr (Loader) | The address to copy to in the CopyMemory routine |
| TP | The current mission status |
| track | Storage for a track number in the RWTS code |
| track (Loader) | Storage for a track number in the RWTS code |
| tracks | The number of tracks per disk |
| tracks (Loader) | The number of tracks per disk |
| TRIBBLE | The number of Trumbles in the cargo hold |
| tslsct | The sector for the commander file's track/sector list |
| tslsct (Loader) | The sector for the commander file's track/sector list |
| tsltrk | The track for the commander file's track/sector list |
| tsltrk (Loader) | The track for the commander file's track/sector list |
| TYPE | The current ship type |
| U | Temporary storage, used in a number of places |
| UPO | Used as an index into the UB tables when projecting the scroll text lines onto the Star Wars perspective view and then onto the screen |
| UPTOG | Upper case configuration setting |
| V | Temporary storage, typically used for storing an address pointer |
| VIEW | The number of the current space view |
| widget | Temporary storage, used to store the original argument in A in the logarithmic FMLTU and LL28 routines |
| X1 | Temporary storage, typically used for x-coordinates in the line-drawing routines |
| X2 | Temporary storage, typically used for x-coordinates in the line-drawing routines |
| XC | The x-coordinate of the text cursor (i.e. the text column), which can be from 0 to 32 |
| XP | The x-coordinate of the current character as we construct the lines for the Star Wars scroll text |
| XSAV | Temporary storage for saving the value of the X register, used in a number of places |
| XSAV2 | This byte appears to be unused |
| XX | Temporary storage, typically used for storing a 16-bit x-coordinate |
| XX0 | Temporary storage, used to store the address of a ship blueprint. For example, it is used when we add a new ship to the local bubble in routine NWSHP, and it contains the address of the current ship's blueprint as we loop through all the nearby ships in the main flight loop |
| XX1 | This is an alias for INWK that is used in the main ship-drawing routine at LL9 |
| XX12 | Temporary storage for a block of values, used in a number of places |
| XX13 | Temporary storage, typically used in the line-drawing routines |
| XX15 | Temporary storage, typically used for storing screen coordinates in line-drawing routines |
| XX16 | Temporary storage for a block of values, used in a number of places |
| XX17 | Temporary storage, used in BPRNT to store the number of characters to print, and as the edge counter in the main ship-drawing routine |
| XX18 | Temporary storage used to store coordinates in the LL9 ship-drawing routine |
| XX19 | XX19(1 0) shares its location with INWK(34 33), which contains the address of the ship line heap |
| XX2 | Temporary storage, used to store the visibility of the ship's faces during the ship-drawing routine at LL9 |
| XX20 | Temporary storage, used in a number of places |
| XX24 | This byte appears to be unused |
| XX4 | Temporary storage, used in a number of places |
| Y1 | Temporary storage, typically used for y-coordinates in line-drawing routines |
| Y2 | Temporary storage, typically used for y-coordinates in line-drawing routines |
| YC | The y-coordinate of the text cursor (i.e. the text row), which can be from 0 to 23 |
| YP | The y-coordinate of the current character as we construct the lines for the Star Wars scroll text |
| YS | Temporary storage for saving the index into the TB tables in the SLIDE routine |
| YSAV | Temporary storage for saving the value of the Y register, used in a number of places |
| YSAV2 | This byte appears to be unused |
| Yx2M1 | This is used to store the number of pixel rows in the space view minus 1, which is also the y-coordinate of the bottom pixel row of the space view (it is set to 191 in the RES2 routine) |
| YY | Temporary storage, typically used for storing a 16-bit y-coordinate |
| ZP1 (Transfer program) | Stores addresses used for moving content around |
| ZP2 (Transfer program) | Stores addresses used for moving content around |
| ztemp0 | Temporary storage used by the disk routines |
| ztemp0 (Loader) | Temporary storage used by the disk routines |
| ztemp1 | Temporary storage used by the disk routines |
| ztemp1 (Loader) | Temporary storage used by the disk routines |
| ztemp2 | Temporary storage used by the disk routines |
| ztemp2 (Loader) | Temporary storage used by the disk routines |
| ztemp3 | Temporary storage used by the disk routines |
| ztemp3 (Loader) | Temporary storage used by the disk routines |
| ZZ | Temporary storage, typically used for distance values |