Supermodel - RetroBIOS¶
Technical notes
Open-source Sega Model 3 arcade emulator by Bart Trzynadlowski (trzy) and contributors, under GPL-3.0. Emulates all three Model 3 steppings (1.0, 1.5, 2.0/2.1) including Real3D graphics, SCSP sound, DSB1/DSB2 MPEG music boards, drive boards, and net board. Cross-platform (Windows, Linux, macOS).
Uses MAME-compatible ROM sets loaded from ZIP archives. GameLoader identifies games by CRC32 checksums defined in Config/Games.xml. Parent/child ROM set relationships exist between regional variants of the same game, not as shared BIOS sets. No standalone BIOS or firmware files are loaded outside of game ZIPs.
EmuDeck installs the Flatpak package (com.supermodel3.Supermodel). Config stored in ~/.supermodel/Config/. No checkBIOS entry in EmuDeck.
Four data files of its own are read from the install tree, Config/ and Assets/
relative to the working directory on Windows and macOS, under the home
directory on Linux. Supermodel.ini, NVRAM/
4 files | 3 required, 1 optional | 1 in repo, 3 missing
Games.xml required in repo bundled
ROM set definitions
- Path:
Config/Games.xml - Source:
Src/OSD/SDL/Main.cpp:114,Src/OSD/SDL/Main.cpp:1498,Src/OSD/SDL/Main.cpp:1939,Src/OSD/SDL/Main.cpp:2297-2307,Src/GameLoader.cpp:551-561,Src/GameLoader.cpp:1016-1019 - Parsed at startup into the game database. Every ROM region, file name and CRC32 the loader matches against comes from here, so an unreadable file leaves no set to resolve and the launch returns before the emulator is built. The path is a config key, so -game-xml-file moves it.
p1crosshair.bmp required missing bundled
Player 1 light gun crosshair texture
- Path:
Assets/p1crosshair.bmp - Size: 289.1 KB
- Source:
Src/OSD/SDL/Crosshair.cpp:34-51,Src/OSD/SDL/Main.cpp:2350-2356,Assets/DIR.txt - Both bitmaps are read on every launch whatever CrosshairStyle holds, since the load runs before the style decides anything, and a null surface aborts startup ahead of the Model 3 object. 32 bit BMP with alpha, sides a multiple of 2.
p2crosshair.bmp required missing bundled
Player 2 light gun crosshair texture
- Path:
Assets/p2crosshair.bmp - Size: 289.1 KB
- Source:
Src/OSD/SDL/Crosshair.cpp:35,Src/OSD/SDL/Crosshair.cpp:49-51,Src/OSD/SDL/Main.cpp:2350-2356 - Read in the same call as the player 1 bitmap and equally fatal when it fails to load.
Music.xml optional missing bundled
Custom MPEG music track map
- Path:
Config/Music.xml - Source:
Src/OSD/SDL/Main.cpp:115,Src/OSD/SDL/Main.cpp:940,Src/Sound/MPEG/MpegAudio.cpp:88-108 - Consulted only for a game with a DSB1 or DSB2 board, and skipped when the file is absent. Maps an MPEG ROM offset to an MP3 the user supplies.
Generated on 2026-08-23T16:12:06Z