Caprice32 - RetroBIOS

Type	libretro
Source	https://github.com/libretro/libretro-cap32
Version	v4.2.0
Profiled	2026-03-18
Cores	cap32
Systems	amstrad-cpc

No BIOS or firmware files required. This core is self-contained.

Caprice32 is an Amstrad CPC emulator ported to libretro. Supports CPC 464, CPC 664, CPC 6128, and CPC+ (Plus) models.

All system ROMs are compiled directly into the core binary as C header arrays in cap32/rom/*.h. No external BIOS files are required.

Embedded ROMs (cap32/cap32.c:342-345): - cap32/rom/464.h: OS_BASIC10[32768] - CPC 464 OS + BASIC 1.0 - cap32/rom/6128.h: OS_BASIC11[32768] - CPC 6128 OS + BASIC 1.1 - cap32/rom/amsdos.h: AMSDOS[16384] - AMSDOS disk controller ROM - cap32/rom/6128p.h: OS_6128P - CPC+ system cartridge ROM - cap32/rom/cpm.h: cpmROM - CP/M boot snapshot (128KB)

ROM selection in emulator_select_ROM() (cap32/cap32.c:1072-1100): - CPC 464: OS_BASIC10 (32KB) - CPC 664: OS_BASIC10 (32KB) + AMSDOS in slot 7 - CPC 6128: OS_BASIC11 (32KB) + AMSDOS in slot 7 - CPC+: OS_6128P loaded as system cartridge via cpr_load()

The standalone (non-libretro) version references external filenames cpc464.rom, cpc664.rom, cpc6128.rom, amsdos.rom in cap32.c:349-352 via config file loading (cap32.c:1828-1840), but the libretro port does not use this path. The libretro init (libretro-core.c:1512) has a "TODO: future use to load custom bios" comment that is not implemented.

Keyboard layout patches are applied to the ROM in memory for French and Spanish layouts via rom_mods.h (cap32.c:1102-1126).

CP/M support loads a pre-built snapshot (cpm.h) into memory via snapshot_load_mem() in slots.c:87.

Generated on 2026-03-18T17:30:32Z