Model 2 Emulator - RetroBIOS¶
Technical notes
Closed-source Sega Model 2 arcade emulator by ElSemi, formerly Nebula Model 2. Emulates Model 2, 2A, 2B, and 2C hardware. Windows-only, runs via Proton on Linux (EmuDeck setup). Last official release 1.1a (2014-01-02).
Uses MAME-format merged ROM sets. Each game ZIP contains all required ROMs (program, geometry, texture, sound, protection chips). No shared parent BIOS set exists for Sega Model 2 hardware; each game board has its own ROM chips.
EmuDeck packages version 1.1c from SeongGino/edc-repo0004. Installs to romsPath/model2/ with emulator_multicpu.exe as main binary. Ships with Lua scripts for game-specific patches (widescreen, fixes). No checkBIOS entry in EmuDeck; EMULATOR.INI references only a roms/ subdirectory.
Source code never published. Original distribution via nebula.emulatronia.com (archived). PhilrocWP/Model2 GitHub repo no longer exists.
No BIOS or firmware files required.
Why no files
Uses MAME-format merged ROM sets where all required ROMs are contained within each game's ZIP file. No standalone BIOS or firmware files are loaded by the emulator. The Sega Model 2 hardware has no shared system BIOS; each game board has its own set of program, geometry, texture, and sound ROMs.
Generated on 2026-04-03T20:37:39Z