Mu - RetroBIOS

Type	libretro
Classification	Pure libretro
Source	https://github.com/libretro/Mu
Upstream	https://github.com/meepingsnesroms/Mu
Version	v1.3.3
Profiled	2026-03-24
Cores	mu
Systems	palm-os

Platform details

palm_m5xx: - rom_size: 4194304 - bootloader_size: 512 - cpu: MC68VZ328 - source_ref: include/m5XXBus.h:23,28, src/emulator.c:191-212 tungsten_t3: - rom_size: 16777216 - cpu: PXA260 (ARM) - source_ref: include/tungstenT3Bus.h:17, src/emulator.c:145-162

Technical notes

Mu emulates Palm m500, Palm m515, and (with EMU_SUPPORT_PALM_OS5) Tungsten T3. A Palm OS ROM dump is required. The core selects the ROM filename based on the "OS Version" core option: Palm m500 / Palm OS 4.0 -> palmos40-en-m500.rom Palm m515 / Palm OS 4.1 -> palmos41-en-m515.rom (default) Tungsten T3 / Palm OS 5.2 -> palmos52-en-t3.rom Tungsten T3 / Palm OS 6.0 -> palmos60-en-t3.rom

ROM path: RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY + "/" + osVersion + ".rom". No hash or size validation; the code reads whatever file is present. The bootloader is optional and ignored for Tungsten T3. Supports no-game mode (boots Palm OS desktop from ROM without content).

5 files | 1 required, 4 optional | 5 in repo, 0 missing

palmos41-en-m515.rom required in repo
Palm m515 ROM, Palm OS 4.1 English

• System: palm-os
• Source: libretroBuildSystem/libretro.c:173-176, libretroBuildSystem/libretro.c:744-763
• Platforms: lakka, recalbox, retroarch, retropie
• Default ROM. Selected when core option is 'Palm m515/Palm OS 4.1'.

palmos40-en-m500.rom optional in repo
Palm m500 ROM, Palm OS 4.0 English

• System: palm-os
• Source: libretroBuildSystem/libretro.c:169-172
• Platforms: lakka, retroarch, retropie
• Selected when core option is 'Palm m500/Palm OS 4.0'.

palmos52-en-t3.rom optional in repo
Tungsten T3 ROM, Palm OS 5.2.1 English

• System: palm-os
• Source: libretroBuildSystem/libretro.c:178-181
• Platforms: lakka, retroarch, retropie
• Selected when core option is 'Tungsten T3/Palm OS 5.2.1'. Requires EMU_SUPPORT_PALM_OS5 compile flag.

palmos60-en-t3.rom optional in repo
Tungsten T3 ROM, Palm OS 6.0 English

• System: palm-os
• Source: libretroBuildSystem/libretro.c:182-185
• Platforms: lakka, retroarch, retropie
• Selected when core option is 'Tungsten T3/Palm OS 6.0'. Requires EMU_SUPPORT_PALM_OS5 compile flag.

bootloader-dbvz.rom optional in repo
MC68VZ328 UART bootloader

• System: palm-os
• Source: libretroBuildSystem/libretro.c:766-782, src/dbvz.c:1408-1423
• Platforms: lakka, recalbox, retroarch, retropie
• Optional for m500/m515. Ignored for Tungsten T3.

Generated on 2026-09-14T09:03:10Z