Cheet Sheets 1995 April/May

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Text File | 1995-05-07 | 10KB | 199 lines

~Descent Unofficial *.PLR file specs for Descent, v0.1 from Darren Lo, via EMail/Internet. Well, after a little poking around in the *.PLR files, I discovered how to get all sorts of cool stuff... there seems to be interest, so I'm posting cursory offset tables. There are a couple things that don't seem to do anything, plus others that I haven't bothered to figure out yet. If you have any additions feel free to send them to darrenlo@umich.edu. Each saved game begins with the game name (an ASCIIZ string). This is an easy way to tell which game you're messing around with. All offsets are in hex. All ints and long ints in the file are stored "back-words" in true x86 fashion. (i.e., least significant byte first, most significant byte last). You may want to back up your pilot file before mucking about in it with your hex editor, because I make no claims as to the accuracy of my typing, counting, record-keeping, or hex arithmetic. Please let me know if I have messed something up, or if I am just plain wrong. `Offset: Offset in save: Description: `------ --------------- ----------- `0-13 X Header info? `14-2C 0-18 Saved game name `2E-38 1A-24 Pilot name saved under `4B 37 Quad lasers if 4, no quads for other values?? `50-51 3C-3D Energy level when last level was completed. This appears to be a signed int. If it is less than 100, you get 100 energy.. max energy value is for FF 7F in these two bytes. `52-53 3E-3F ??? `54-55 40-41 Shield levels. see energy notes `56 42 Number of lives, besides this one (so 06 gives you five lives spare) `57 43 Last level completed??? `58 44 Laser descriptor byte... see table below `59 45 Level at which game was started `5C 48 Weapon inventory bit field: 00000100 = spreadfire, 00000010 = Vulcan, 00000001 = lasers `5D 49 Missile inventory bit field: 00000100 = mines, 00000010 = homing missiles, 00000001 = concussion `60-61 4C-4D Vulcan ammo packs (one pack is approx. = to 25.501 rounds). I think this is signed, so don't go overboard folks ;) `68-69 54-55 # concussion missiles unsigned `6A-6B 56-57 # homing missiles (unsigned) `6C-6D 58-59 # mines (unsigned) ~smart missiles and mega missiles most likely will follow `72-75 5E-61 Possibly score at beginning of last level? Can anybody help ? `76-79 62-65 Current score (signed I think) `7A-81 66-6D No clue... ~long stretch of ignorance... time of play must be stored somewhere `A2 8E difficulty level (0=trainee, 1=rookie, etc.) `A6 92 selected weapon (0=laser, 1=Vulcan, 2=spreadfire) Odd things will happen if you put higher numbers here `AA 96 selected missile (0=concussion, 1=homing, 2=mines) `AE 9A Display mode 0: Cockpit mode 1: Weird.bitmap-type background behind a squashed screen... looks as if video RAM isn't cleared up or something... 2: Status bar mode 3: Full screen mode 4: Cinematic, shaped like a movie screen... like the screen you get when you blow up 5: "Weird" on bottom half, cinematic on top... reverts to cinematic after death `B2-B3 9E-9F # of pixels to display in horizontal direction. In conjunction with the vertical pixel settings, you can play with some pretty weird screen sizes. I like 320 X 23 myself `B6 A2 # of pixels to display in vertical direction. This may be only one byte, but I'm not sure. the VR modes may require two bytes... ??? `BA A6 Current level # (starts from 1) `C2 00 Saved game 2 `170 00 Saved game 3 ~many saved games follow... `6E0 XX Taunt macro 1. A 19-byte ASCIIZ string `6F9 XX Taunt macro 2 `712 XX Taunt macro 3 `72B XX Taunt macro 4 and some junk toward the end, probably representing controller configurations? Laser Descriptor Byte table: This byte, at offset 44 within each saved game, is IMHO the funnest to play with. It appears that Descent references all weapons internally, both of the player and the baddies, using the same numbering system. So after level 4 lasers, you start getting into some neat weapons. :) What's more, slapping on a quad will make you more powerful than almost anything! Each weapon, regardless of type, runs off your energy. It takes four shots to deplete one energy unit, or two shots if you have quads. CAUTION: If you're running about with level 17 lasers (my personal favorite) and hit a laser powerup, your lasers will revert to level 4. But when you die, 16 laser powerups will still go floating into the room. ~Descriptor Byte Value: Description: ~--------------------- ----------- `00 Level 1 lasers `01 Level 2 `02 Level 3 `03 Level 4 `04 Big, slow, weak, blue plasma balls... does anybody recognize these? `05 Yellow drone's fireballs (WEAK) `06 Reactor's red fireballs `07 Apparently nothing... I speculate that this might be the weapon of the green lifter drones... but I don't know how to use it `08 Concussion missiles! `09 Flares `0A Blue drone's lasers `0B Vulcan cannon (fires slower than normal Vulcan) `0C Spreadfire cannon balls `0D Nothing again... `0E And again... `0F Homing missiles. Put quads on these babies! `10 Mines... Do NOT put quads on these! %-{ `11 Level 7 boss's missiles... these hit for HUGE damage and then fragment into tons of little green blobs that home onto enemies. The blobs are powerful but slow. `12 Nothing... `13 Just the green blobs from the boss missiles `14 Spreadfire cannon balls (possibly faster or stronger than for 0C ?) `15 Slow homing missiles `16 Slow (?) concussion missiles `17 Spreadfire cannon balls AGAIN `18 Wimpy, slow red lasers `19 Slow green lasers `1A Nothing AGAIN... `1B Yellow drone's fireballs... seem more powerful, and maybe faster? `1C Wimpy, FAST red lasers `1D Same lasers... possibly stronger? `1E and above seem to have the same red lasers... I haven't checked them all of course. Increasing the difficulty of the game will make some weapons faster or stronger. Happy hacking!