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# VICE x128 - RetroBIOS

Type | libretro
Classification | community_fork
Source | https://github.com/libretro/vice-libretro
Upstream | https://sourceforge.net/projects/vice-emu/
Version | 3.10
Profiled | 2026-03-25
Cores | vice_x128
Systems | commodore-c128

Technical notes

System ROMs embedded in binary: C128 kernal (318020-05), chargen (390059-01), BASIC lo (318018-04), BASIC hi (318019-04), C64 kernal (901227-03), C64 BASIC (901226-01), plus all drive ROMs (1540, 1541, 1541-II, 1551, 1570, 1571, 1571CR, 1581, 1001, 2031, 2040, 3040, 4040, 9000). Embedded ROM check in sysfile_load takes priority over filesystem. Localized kernal/chargen variants (DE, FI, FR, IT, NO, SE, CH) are in the embedded list with NULL data pointers; selecting a non-international model produces uninitialized ROM data. JiffyDOS requires True Drive Emulation enabled and a 1541/1571/1581 drive type. C64 BASIC/kernal use shared names (basic-901226-01.bin, kernal-901227-03.bin) instead of upstream c128-specific names (basic64-901226-01.bin, kernal64-901227-03.bin) to share files with the C64 core in RetroArch's shared system directory.

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

`JiffyDOS_C128.bin` -optional : JiffyDOS C128 kernal replacement

- Source: `retrodep/ui.c:309-310`
- Platforms: lakka, recalbox, retroarch, retropie
- Loaded into KernalIntName when vice_jiffydos option is enabled.

`JiffyDOS_C64.bin` -optional : JiffyDOS C64 kernal replacement (GO64 mode)

- Source: `retrodep/ui.c:307-308`
- Platforms: lakka, recalbox, retroarch, retrodeck, retropie
- Loaded into Kernal64Name when vice_jiffydos option is enabled.

`JiffyDOS_1541-II.bin` -optional : JiffyDOS 1541-II drive DOS replacement

- Source: `retrodep/ui.c:283-284`
- Platforms: lakka, recalbox, retroarch, retrodeck, retropie
- Loaded into DosName1541ii when vice_jiffydos option is enabled.

`JiffyDOS_1571_repl310654.bin` -optional : JiffyDOS 1571 drive DOS replacement

- Source: `retrodep/ui.c:285-286`
- Platforms: lakka, recalbox, retroarch, retrodeck, retropie
- Loaded into DosName1571 when vice_jiffydos option is enabled.

`JiffyDOS_1581.bin` -optional : JiffyDOS 1581 drive DOS replacement

- Source: `retrodep/ui.c:287-288`
- Platforms: lakka, recalbox, retroarch, retrodeck, retropie
- Loaded into DosName1581 when vice_jiffydos option is enabled.

Generated on 2026-03-25T14:56:43Z