emux (SMS) - RetroBIOS¶
| Type | libretro |
| Classification | official_port |
| Source | https://github.com/libretro/emux |
| Upstream | https://github.com/sronsse/emux |
| Version | 0.1 |
| Profiled | 2026-03-23 |
| Cores | emux_sms |
| Systems | sms |
Technical notes
emux is a multi-system emulator by Sebastien Ronsse. BIOS and cartridge code identical between upstream and libretro fork (only difference: libretro adds g_ram_data/g_ram_size exposure in mach/sms.c for RETRO_MEMORY_SYSTEM_RAM).
BIOS loaded via file_map(PATH_SYSTEM, "bios.sms", 0, BIOS_SIZE) in sms_mapper_init (sms_mapper.c:162-165). Returns false on failure — no HLE fallback. Mapped at 0x0000, overlays cartridge ROM until bios_disable bit set in slot control register (sms_mapper.c:79-82).
No hash validation. Code accepts any file >= 8192 bytes. is_experimental=true. No save states, rewind, or netplay.
1 files | 1 required, 0 optional | 1 in repo, 0 missing
bios.sms -required
: Sega Master System BIOS
- System: sms
- Size: 8.0 KB
- Validation: size
- Source:
controllers/mapper/sms_mapper.c:12 (BIOS_SIZE=0x2000), :61 (bios_path), :162-170 (file_map + NULL check → return false) - Platforms: lakka, retroarch, retrodeck, retropie
- Mapped at 0x0000, overlays cartridge ROM until bios_disable bit set. file_map rejects files < 8192 bytes (file.c:59).
Generated on 2026-03-25T14:56:43Z