Skip to content

# MAME 2000 - RetroBIOS

Type | libretro
Classification | frozen_snapshot
Source | https://github.com/libretro/mame2000-libretro
Upstream | https://www.mamedev.org
Version | 0.37b5
Profiled | 2026-03-24
Cores | mame2000
Systems | snk-neogeo-mvs, deco-cassette

Technical notes

Frozen snapshot of MAME 0.37b5 via iMAME4All (David Valdeita). Fastest and least accurate MAME core. Supports ~2000 arcade games from the 0.37b5 ROM set.

BIOS handling follows MAME 0.37b5 conventions. Shared BIOS files are packaged as parent ROM ZIPs (e.g. neogeo.zip) and placed in the ROM directory alongside game ROMs. The core searches only the ROM directory for ROMs and BIOS sets.

Samples (per-game WAV files) are loaded from system_dir/mame2000/samples/. They provide sound effects for certain games and are optional.

hiscore.dat, history.dat and mameinfo.dat are loaded from the ROM directory. cheat.dat is loaded from system_dir/mame2000/cheat/. hiscore.dat and cheat.dat are bundled in the core repo (metadata/).

6 files | 2 required, 4 optional | 5 in repo, 1 missing Categories: 4 game data, 2 BIOS ZIPs

`hiscore.dat` -optional, game_data

- Source: `src/hiscore.c:18,252-254`
- high score definitions, loaded from ROM directory

`cheat.dat` -optional, game_data

- Source: `src/cheat.c:210,618,830`
- cheat definitions, loaded from system_dir/mame2000/cheat/

`history.dat` -optional, game_data

- Source: `src/datafile.c:52,281,541`
- game history database, loaded from ROM directory

`mameinfo.dat` -optional, game_data, missing from repo

- Source: `src/datafile.c:53,281,568`
- game technical info database, loaded from ROM directory

`neogeo.zip` -required, bios_zip

- System: snk-neogeo-mvs
- Source: `src/drivers/neogeo.c:4499-4508`
- Platforms: batocera, emudeck, lakka, recalbox, retroarch, retrobat, retrodeck, retropie
- Contents (3 entries):
  - `neo-geo.rom` -68K BIOS -128.0 KB
  - `ng-sm1.rom` -Z80 sound BIOS -128.0 KB
  - `ng-sfix.rom` -fix layer tiles -128.0 KB

`decocass.zip` -required, bios_zip

- System: deco-cassette
- Source: `src/drivers/btime.c:1996-2005`
- Platforms: lakka, retroarch, retrodeck, retropie
- Contents (2 entries):
  - `rms8.cpu` -6502 BIOS -4.0 KB
  - `rms8.snd` -audio CPU -2.0 KB

Generated on 2026-03-25T14:56:43Z