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The 7th Guest Developer Wiki

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The 7th Guest modding and reverse engineering. This independent developer wiki organizes research into the original game, its GROOVIE V1 engine, GRV scripts, graphics, audio and resource formats. It brings the MS-DOS, Windows and Macintosh disassembly topics into one searchable directory.

About the project and documentation

For developers investigating a mod or a game hack, the catalogue connects practical editing questions to the underlying formats and engine behavior. Decompilation, recompilation and disassembly are related research activities, but they are different deliverables; this wiki does not claim that a complete recovered source tree or rebuilt executable is already available.

The article directory distinguishes planned entries from published documentation. Planned pages reserve a topic and do not yet provide technical instructions. The category guides explain the scope of each area, and completed articles will document evidence, input builds and reproducible results.

For an established open-source engine implementation, see the ScummVM Groovie engine documentation. This wiki is an independent reference and is not an official Trilobyte or ScummVM site.

Article catalogue in progress. Article content and category data are served from PostgreSQL.

Browse the article titles below.

A

Aborted Game SnapshotSavegames
Adapter and Driver DescriptorAudio & Music
Address Space ConventionsHistory & Research
Adjacent Piece ConversionPuzzles & Game Logic
AdLib and OPL SynthesisAudio & Music
Animation and Frame TimingInput & Cursors
Archive IDs and Reference EncodingArchives & Resources
Archive InventoryArchives & Resources
Archive StructureArchives & Resources
Arithmetic Helpers and Calling ConventionsMacintosh Disassembly
Artifact Provenance and HashesHistory & Research
Audio and CD BehaviorWindows Disassembly
Audio Chunk 0x80Graphics
Authoring a Room ScriptTools & Modding

B

C

D

E

F

G

H

Historical Bugs and Overlapping InstructionsMS-DOS Disassembly

I

K

Keyboard Actions and Hidden InputsGRV Scripting
Keyboard Queues and Key ActionsInput & Cursors

L

M

N

Named and Numeric LookupArchives & Resources
NASM Encodings and Literal FallbacksMS-DOS Disassembly
Native Function CatalogueMacintosh Disassembly
New Animation and PCM AudioTools & Modding
No-Argument Diagnostic OutputMS-DOS Disassembly

O

P

R

S

T

T7GData and HDISK.RLArchives & Resources
T7GData Archive and FF SeparatorsMacintosh Disassembly
T7GM Scripts and IndexesMacintosh Disassembly
T7SG Save ResourcesMacintosh Disassembly
Ties and Random SelectionPuzzles & Game Logic
Tile Coordinates and Image DimensionsGraphics
Timers and Tick CountersEngine Runtime
Timer Scheduling and CallbacksAudio & Music
Timing and Note DurationsAudio & Music
TLC and FLIC BridgeHistory & Research
Toolkit OverviewTools & Modding
Truncation and Output BoundsCompression
Twelve-Bit DictionaryCompression
Two-Color Still TilesGraphics

U

V

W

X

XMS Allocation and Move DescriptorsEngine Runtime
XMS Cache and Background TransfersMS-DOS Disassembly

Z

Zaphod BeeblebroxPuzzles & Game Logic

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