ClownMDEmu - RetroBIOS¶
| Type | standalone + libretro |
| Classification | official_port |
| Source | https://github.com/Clownacy/clownmdemu-libretro |
| Upstream | https://github.com/Clownacy/clownmdemu |
| Version | Git |
| Profiled | 2026-03-23 |
| Cores | clownmdemu |
| Systems | sega-megadrive, sega-megacd |
Source analysis
tmss:
- **supported:** False
megacd_bios:
- **external_required:** False
- **builtin_boot_rom:** True
- **boot_rom_source:** https://github.com/Clownacy/clownmdemu-mcd-boot
- **boot_rom_location:** source/mega-cd-boot-rom.c (16384 uint16 entries = 32 KB)
- **bus_mapping:** 0x400000-0x41FFFF (address & 0x20000 == 0)
- **source_ref:** bus-main-m68k.c:19-21, bus-main-m68k.c:501-513
- **bios_hle:** True
- **hle_source_ref:** bus-sub-m68k.c:64 (MegaCDBIOSCall)
Technical notes
Mega Drive/Genesis and Mega CD emulator by Clownacy. Supports cartridge (bin/md/gen) and CD (cue/iso/chd) formats, plus a subsystem for cartridge+CD combo (Mega CD Mode 1). Mega CD boot ROM is an open-source replacement compiled into the binary (mega-cd-boot-rom.c, 32 KB). Sub-CPU BIOS calls handled via HLE. TMSS not implemented. No external files needed.
No BIOS or firmware files required. Generated on 2026-03-25T14:56:43Z