MM1 Overview

MM1 Overview

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This repo’s primary target is MM2 (Amiga), but several MM1 (DOS) formats are partially decoded here because the two games share the same overland grid and nearly identical maze geometry. Use this page as the hub for MM1-specific docs, tools, and decode status.

Platform: MS-DOS · Geometry file: MAZEDATA.DTA · Map scripts: per-screen *.OVR overlays · Reference: ScummVM engines/mm/mm1

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Decode status

Area	Status	Doc / tool
Mazes (MAZEDATA.DTA)	Decoded — 55 × 512 B, same layout as MM2 map.dat	22-mm1-mazedata-format · tools/mm1_maps.py
Overland → MM2	Decoded — sector grid, collision merge, biome heuristics	23-mm1-to-mm2-outdoor · tools/mm1_outdoor_codec.py
Outdoor WALLPIX	Partial — lane ids from *.OVR, sheets 7–14 exported	24-mm1-outdoor-wallpix-by-sector · tools/mm1_wallpix.py
Indoor wall art	Partial — lagdotcom wallNN.png slice layout	51-mm1-art-and-graphics
Map events (*.OVR)	Not in repo — scripts live in OVR code+data segments	ScummVM maps/maps.cpp
Items	Not decoded	52-mm1-items-monsters-events
Monsters	Not decoded	52-mm1-items-monsters-events
Spells	Not decoded	52-mm1-items-monsters-events

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All 55 maze screens

Screen order matches MAZEDATA.DTA and the slug table in MM.EXE @ 0x10C07 (tools/mm1_maps.py MM1_MAP_SLUGS).

#	Slug	Title	Kind
0	sorpigal	Sorpigal	town
1	portsmit	Portsmith	town
2	algary	Algary	town
3	dusk	Dusk	town
4	erliquin	Erliquin	town
5–13	cave1…cave9	Caves 1–9	dungeon
14–17	areaa1…areaa4	Overland A1–A4	outdoor
18–21	areab1…areab4	Overland B1–B4	outdoor
22–25	areac1…areac4	Overland C1–C4	outdoor
26–29	aread1…aread4	Overland D1–D4	outdoor
30–33	areae1…areae4	Overland E1–E4	outdoor
34	doom	Doom	dungeon
35–36	blackrn, blackrs	Blackridge North/South	dungeon
37–38	qvl1, qvl2	Queen’s Vault 1–2	dungeon
39–40	rwl1, rwl2	Ruby Warlock Lair 1–2	dungeon
41–42	enf1, enf2	Endgame Fight 1–2	dungeon
43	whitew	White Wolf	dungeon
44	dragad	Dragon’s Den	dungeon
45–47	udrag1…udrag3	Upper Dragon Caves 1–3	dungeon
48	demon	Demon’s Dome	dungeon
49	alamar	Castle Alamar	dungeon
50–53	pp1…pp4	Plane of Power 1–4	dungeon
54	astral	Astral Plane	dungeon

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Interactive map walker

First-person 3D explorer for all 55 screens — indoor frustum uses MM2 town/cave/castle .32 stand-ins; overland sectors use converted bytes + MM2 outdoor horizon sheets.

Target	URL / path
GitHub Pages	vairn.github.io/MM2/mm1-maze-walker/
Local bundle	wiki/mm1-maze-walker/

Regenerate (needs GOG MAZEDATA.DTA, repo map.dat + attrib.dat, optional *.OVR for outdoor biomes):

python tools/export_mm1_map_walker.py
cd wiki/mm1-maze-walker
python -m http.server 8081

Controls: W/S forward/back, A/D turn — same as the MM2 map walker.

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Tools

Script	Purpose
tools/mm1_maps.py	Load MAZEDATA.DTA, slug/title tables, screen iterator
tools/mm1_outdoor_codec.py	MM1 area* → MM2-compatible visual/collision/attrib
tools/mm1_wallpix.py	WALLPIX lane lookup, lagdotcom sheet slicing
tools/mm1_outdoor_wallpix_table.py	Regenerate 24-mm1-outdoor-wallpix-by-sector
tools/export_mm1_map_walker.py	HTML walker bundle (wiki/mm1-maze-walker/walker-bundle.js)
tools/_mm1_wallpix_lookup.py	Debug OVR → WALLPIX entry trace

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Related MM2 docs

• 21-map-dat-format — MM2 maze pages (same bit layout as MM1)
• 15-3d-view-and-game-screen — frustum renderer the walkers reuse
• 07-dat-files-and-formats — MM2 data inventory

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See also

Page	Why
MM1 MAZEDATA Format	55-screen MAZEDATA layout
MM1 to MM2 Outdoor	Overland conversion
MM1 Art and Graphics	WALLPIX decode status
MM1 Map Walker	Interactive 55-screen explorer