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Captive Game Data
Data extracted from the verified DOS executable CAPPO.EXE (v1.06, Oct 7 1992). The executable is LZEXE v0.91 compressed (73,056 bytes packed, 144,556 bytes unpacked).
VERSION 1.06 OCT.07.92
COPYRIGHT RATT 1990 CAPTIVE A MINDSCAPE PRODUCT PC CONVERSION BY TAG 1992
Save file: CAPTIVE1.SAV
10 material grades, ascending quality. Indices 1-3 are blank (unused tiers) in the original binary:
| # | Material |
|---|---|
| 0 | SHIT |
| 1 | (blank) |
| 2 | (blank) |
| 3 | (blank) |
| 4 | HUMAN |
| 5 | TINDRON |
| 6 | COPPATOR |
| 7 | BRONZITE |
| 8 | IRONIDE |
| 9 | CROMIZE |
Each droid has 10 trainable combat skills:
| # | Skill |
|---|---|
| 0 | ROBOTICS |
| 1 | BRAWLING |
| 2 | SWORDS |
| 3 | HANDGUNS |
| 4 | RIFLES |
| 5 | AUTOMATICS |
| 6 | LASERS |
| 7 | CANNONS |
| 8 | SPAYGUNS |
| 9 | EXPERIENCE |
12 purchasable device categories:
AG-SCAN, ROOT-FINDER, MAPPER, RADAR, MAGNA-SCAN, BODY-SCAN,
VISION-CORRECTOR, VISOR, ANTI-GRAV, SHIELD, FIRE-SHIELD, GREASER
6 body part slots:
HEAD, CHEST, ARM, LEG, FOOT, HAND
Items found in the DOS executable at offsets 0x019c90-0x019fe4, with hex prefix bytes:
0x019c90 HEAD
0x019ca7 CHEST
0x019cb1 ARM
0x019cb9 LEG
0x019cc1 FOOT
0x019cca HAND
0x019cd3 GOLD
0x019cdc BATTERY
0x019ce7 EXPLOSIVES
0x019cf4 DEV-SCAPE
0x019d00 [21] OPTIC
0x019d08 [21] CAMERA
0x019d11 [00] KNUCLE-DUSTER
0x019d21 [21] BATTLE-GLOVE
0x019d30 [21] WAR-BLADE
0x019d3c [21] LIGHT-BLADE
0x019d4a [21] FIRE-AXE
0x019d55 [21] PISTOL
0x019d5e [30] COLT
0x019d65 [30] MAGNUM
0x019d76 [30] RIFLE
0x019d80 [30] SHOTGUN
0x019d89 [30] HUNTER
0x019d90 [30] UZIE
0x019d99 [30] RAPEDO
0x019da3 [30] BOOSTER
0x019db0 [30] HAND-LASER
0x019dbe [30] LYTE-ZAPPER
0x019dca [30] ION-PULSE
0x019dd8 [30] MONO-CANNON
0x019de7 [30] A51-LAUNCHER
0x019df5 [30] TWIN-CANNON
0x019e00 [30] AIROSOLL
0x019e11 [30] ACID-DISPERSER
0x019eb2 [30] FLAME-THROWER
0x019eb2 [30] A12-
0x019ec2 [30] L22-
0x019eca [30] X42-2-
0x019ed4 CARTRIDGES
0x019ef3 A51 MISSILES
0x019f14 SHELLS
0x019f1d LASER PACK
0x019f2a SONIC PACK
0x019f37 POISON
0x019f3f ACID
0x019f47 FLAMBOS
0x019f52 PLANET PROBE
0x019f63 CLIPBOARD
0x019f7e MINE
0x019f86 DIE
0x019f8c BALL
0x019f93 SUPER BALL
0x019fa0 MAP
0x019fa6 DROID CHIP
0x019fb3 CLIPBOARD
0x019fbf CLIPBOARD
0x019fcb MESSAGE FROM RATT
Note: CLIPBOARD appears three times with different prefix bytes — likely different clipboard types. The hex prefix bytes encode item flags, weapon class and stat modifiers. Full stat decoding of the prefix bytes is not yet complete.
The original supports 4 sound drivers:
| Driver | File | Hardware |
|---|---|---|
| ADLIB | NEW_ADL.BIN | AdLib/OPL2 FM synthesis |
| ROLAND | NEW_ROL.BIN | Roland MT-32/LAPC-1 |
| BEEPER | NEW_BEP.BIN | PC internal speaker |
| SBLASTER | _SBNEW.DAT | Sound Blaster DAC |
Instrument patches: CAP_A.BIN (AdLib), CAP_R.BIN (Roland).
Sound Blaster Creative Voice files: SB15.CTV, SB20.CTV, SBPRO.CTV.
14 music categories with 11 variations each (numbered 1-9, A, B = 154 total track slots):
| Category | Description |
|---|---|
| BATT | Battle tracks |
| COMPROOM | Computer room |
| ESCAPED | Mission success |
| FCBASE | Fast combat base |
| FINAL2 | Final mission / endgame |
| GENBASE | General base / exploration |
| HOLOMAP | Holamap navigation |
| LONGNT | Long night / exploration |
| MAIN2 | Main title screen |
| RUNNING | Chase / running sequence |
| SHOPKEEP | Shop interaction |
| TRAPPED | Game over / trapped |
| VCBASE | Vocal/varied combat base |
| W | World / ambient |
Track filename pattern: SOUND\{CATEGORY}{NUMBER}.MID
OpenCaptive identifies 8 MIDI tracks by SHA-256 and plays them through a 32-voice square-wave synthesizer with ADSR envelope.
The original generates droid names from 48 syllables stored in 4-char slots:
0: VI 1: RUP 2: YUL 3: SCO 4: PHY 5: RAT
6: QUE 7: CHA 8: SY 9: POC 10: E 11: EX
12: DE 13: LAP 14: EL 15: MID 16: SO 17: SI
18: LE 19: NE 20: SIC 21: THA 22: ENE 23: INS
24: OO 25: ES 26: GIN 27: CEP 28: LTE 29: PE
30: DER 31: S 32: DON 33: S 34: ING 35: ST
36: Y 37: ED 38: BERY 39: SY 40: LUME 41: TON
42: FAR 43: HAM 44: KAL 45: APE 46: BEE 47: INK
Names are 2-3 concatenated syllables. The PRNG at code offset 0x44a0 uses:
multiply by 0x5e5, add 0x29, rotate right 4, XOR 0x0800.
Prefix: STATION
Consonants: Z
Vowels1: QUP
Vowels2: TRSLM
Vowels3: B
Suffix1: GRL
Suffix2: S
HOLAMAP SYSTEM V5
CO-OD 150N-150W
Location types: PLANET, MOON, SPACE-STATION Surface types: LAND-MISS, LAND-LEV0, LAND
DESTROY THE GENERATORS.
TOP-LEFT, BOTTOM-LEFT, TOP-RIGHT, BOTTOM-RIGHT.
PUT PLANET-PROBE IN HOLAMAP.
BASE HAS BEEN DESTROYED!
TRILL HAS BEEN RESCUED!
DROID'S HAVE FAILED!
TRILL HAS BEEN LEFT TO DIE.
DROID'S ARE TO BE WASTED
TRILL HAS BE KILLED!
DROIDS BRUTALLY OUTWITTED
PRESS MOUSE TO CONTINUE
LET BATTLE COMMENCE
CAPTIVE MISSION 0001
LEGEND OF TRILL:
Shops appear in space stations between missions.
BUY, SELL, REPAIR, EXIT
INSUFFICIENT CREDITS
INVENTORY FULL
Items are priced based on material grade and weapon type.
SAVE GAME, LOAD GAME
SLOT 1, SLOT 2, SLOT 3, SLOT 4
OVERWRITE EXISTING SAVE?
All PL5 files are 40,000 bytes (320x200, 5bpp):
- Intro/title screens
- Wall textures (multiple sheets)
- Object/item sprites
- HUD panel graphics
- Door and decoration panels
16 animation files for title, intro, game-over, mission briefing, level transitions and victory sequences.
Original DOS keyboard mapping:
UP/DOWN/LEFT/RIGHT — Movement and turning
F1-F4 — Select droid 1-4
SPACE — Action/attack
TAB — Inventory
M — Map (requires Holo Map item)
P — Pause
ESC — Menu
Format: MS-DOS MZ executable
Compression: LZEXE v0.91
Packed size: 73,056 bytes
Unpacked size: 144,556 bytes
Packed SHA-256: 71bcf404103f1ac2920800a8bc166939bb49a1204cf51bebce8aca7dd5faafde
Unpacked SHA-256: fa7d5ca76d26f614476ed41f27cf737084942e9216b20b4605734df9ede9aee4