Clock Signal (CLK) - RetroBIOS

Type	standalone
Source	https://github.com/TomHarte/CLK
Version	2026-07-28
Profiled	2026-03-26
Cores	clk
Systems	amstrad-cpc, acorn-archimedes, acorn-electron, acorn-bbc-micro, amiga, apple-ii, apple-iigs, apple-macintosh, atari-2600, atari-st, colecovision, commodore-plus4, commodore-vic20, enterprise-64-128, microsoft-msx, microsoft-msx2, oric, pc-compatible, sega-mastersystem, sinclair-zx80-81, sinclair-zx-spectrum, thomson-mo5, thomson-mo6

Technical notes

Multi-system cycle-accurate emulator by Tom Harte. Used by Batocera and RetroBat as a standalone emulator. Invoked as clksignal with --rompath pointing to the BIOS directory.

ROM resolution: {rompath}/{machine_name}/{filename}. Machine names are fixed strings per system (e.g. "Enterprise", "Oric", "AmstradCPC"). Batocera passes --rompath=/userdata/bios/.

All ROMs are loaded via a centralized ROM::Request/ROMFetcher system. No hash validation at runtime. CRC32s in the ROM catalogue are for host platform identification only. Sizes are enforced via truncation/padding.

Built-in ROMs (compiled into binary, no external file needed): Amstrad CPC (all 7), ZX Spectrum (all 4), ZX80 + ZX81. These systems function without external ROM files. User-supplied files override the built-in copies.

Atari 2600 requires no system ROM (cartridge-only).

118 files | 52 required, 66 optional | 118 in repo, 0 missing

ROM311 required in repo standalone
RISC OS v3.11

• Path: Archimedes/ROM311
• Size: 2.0 MB
• CRC32: 54c0c963
• Source: Machines/Utility/ROMCatalogue.cpp:58-65

basic.rom required in repo standalone
Acorn BASIC II ROM, shared by BBC Micro and Electron

• Path: Acorn/basic.rom
• Size: 16.0 KB
• CRC32: 79434781
• Aliases: basic2.rom
• Source: Machines/Utility/ROMCatalogue.cpp:78-85

os12.rom required in repo standalone
BBC MOS v1.2

• Path: BBCMicro/os12.rom
• Size: 16.0 KB
• CRC32: 3c14fc70
• Source: Machines/Utility/ROMCatalogue.cpp:436-443
• Platforms: batocera

dfs09.rom optional in repo standalone
Acorn 8271 DFS 0.9 ROM

• Path: BBCMicro/dfs09.rom
• Size: 8.0 KB
• CRC32: 3ce609cf
• Source: Machines/Utility/ROMCatalogue.cpp:444-451
• Conditional: only when using 8271 disk interface

dfs-2.26.rom optional in repo standalone
Acorn 1770 DFS 2.26 ROM

• Path: BBCMicro/dfs-2.26.rom
• Size: 16.0 KB
• CRC32: 5ae33e94
• Source: Machines/Utility/ROMCatalogue.cpp:452-459
• Platforms: batocera
• Conditional: needed for 1770 DFS or tube processor

adfs-1.30.rom optional in repo standalone
Acorn ADFS 1.30 ROM

• Path: BBCMicro/adfs-1.30.rom
• Size: 16.0 KB
• CRC32: d3855588
• Source: Machines/Utility/ROMCatalogue.cpp:460-467
• Conditional: needed for ADFS support

ADT-1.40.rom optional in repo standalone
Advanced Disc Toolkit 1.40 ROM

• Path: BBCMicro/ADT-1.40.rom
• Size: 16.0 KB
• CRC32: 8314fed0
• Source: Machines/Utility/ROMCatalogue.cpp:468-475
• Optional: fetched separately, silently skipped if absent

TUBE110.rom optional in repo standalone
6502 Tube 1.10 Boot ROM

• Path: BBCMicro/TUBE110.rom
• Size: 2.0 KB
• CRC32: 9ec2dbd0
• Source: Machines/Utility/ROMCatalogue.cpp:476-483
• Conditional: needed for 6502 tube processor

Z80_122.rom optional in repo standalone
Z80 Tube 1.22 Boot ROM

• Path: BBCMicro/Z80_122.rom
• Size: 4.0 KB
• CRC32: b5851efc
• Source: Machines/Utility/ROMCatalogue.cpp:484-491
• Conditional: needed for Z80 tube processor

basic.rom required in repo standalone
Acorn BASIC II ROM (Electron copy)

• Path: Electron/basic.rom
• Size: 16.0 KB
• CRC32: 79434781
• Source: Machines/Utility/ROMCatalogue.cpp:90-97

os.rom required in repo standalone
Electron MOS ROM v1.00

• Path: Electron/os.rom
• Size: 16.0 KB
• CRC32: bf63fb1f
• Source: Machines/Utility/ROMCatalogue.cpp:146-156
• The catalogue accepts five images: 406a42ce, 0886741b, bf63fb1f, 6fea0978 and d61135d7. They differ only in the credits text, which lives on the IO page of a real machine.

ADFS-E00_1.rom optional in repo standalone
E00 ADFS ROM, first slot

• Path: Electron/ADFS-E00_1.rom
• Size: 16.0 KB
• CRC32: 51523993
• Source: Machines/Utility/ROMCatalogue.cpp:98-105
• Conditional: needed for PRES ADFS

ADFS-E00_2.rom optional in repo standalone
E00 ADFS ROM, second slot

• Path: Electron/ADFS-E00_2.rom
• Size: 16.0 KB
• CRC32: 8d17de0e
• Source: Machines/Utility/ROMCatalogue.cpp:106-113
• Conditional: needed for PRES ADFS

adfs.rom optional in repo standalone
Acorn ADFS ROM

• Path: Electron/adfs.rom
• Size: 16.0 KB
• CRC32: 3289bdc6
• Source: Machines/Utility/ROMCatalogue.cpp:114-121
• Conditional: needed for Acorn ADFS

DFS-1770-2.20.rom optional in repo standalone
1770 DFS ROM

• Path: Electron/DFS-1770-2.20.rom
• Size: 16.0 KB
• CRC32: f3dc9bc5
• Source: Machines/Utility/ROMCatalogue.cpp:122-129
• Conditional: needed for DFS disk images

ELK130E.rom optional in repo standalone
IDE-modified ADFS 1.03 ROM

• Path: Electron/ELK130E.rom
• Size: 16.0 KB
• CRC32: a923368d
• Source: Machines/Utility/ROMCatalogue.cpp:130-137
• Conditional: needed for IDE interface

AP6v133.rom optional in repo standalone
Advanced Plus 6 ROM

• Path: Electron/AP6v133.rom
• Size: 8.0 KB
• CRC32: e0013cfc
• Source: Machines/Utility/ROMCatalogue.cpp:138-145
• Conditional: needed for AP6 commands

Kickstart-v1.3-rev34.5-1987-Commodore-A500-A1000-A2000-CDTV.rom required in repo standalone
A500/A1000/A2000/CDTV Kickstart 1.3 ROM

• Path: Amiga/Kickstart-v1.3-rev34.5-1987-Commodore-A500-A1000-A2000-CDTV.rom
• Size: 256.0 KB
• CRC32: c4f0f55f
• Source: Machines/Utility/ROMCatalogue.cpp:193-200

os464.rom optional in repo standalone
CPC 464 firmware

• Path: AmstradCPC/os464.rom
• Size: 16.0 KB
• CRC32: 815752df
• Source: Machines/Utility/ROMCatalogue.cpp:261-268, Machines/Utility/ROMLibrary.cpp:14535
• Built into binary. Required for CPC 464 model.

basic464.rom optional in repo standalone
CPC 464 BASIC ROM

• Path: AmstradCPC/basic464.rom
• Size: 16.0 KB
• CRC32: 7d9a3bac
• Source: Machines/Utility/ROMCatalogue.cpp:269-276, Machines/Utility/ROMLibrary.cpp:14532
• Built into binary. Required for CPC 464 model.

os664.rom optional in repo standalone
CPC 664 firmware

• Path: AmstradCPC/os664.rom
• Size: 16.0 KB
• CRC32: 3f5a6dc4
• Source: Machines/Utility/ROMCatalogue.cpp:277-283, Machines/Utility/ROMLibrary.cpp:14537
• Built into binary. Required for CPC 664 model.

basic664.rom optional in repo standalone
CPC 664 BASIC ROM

• Path: AmstradCPC/basic664.rom
• Size: 16.0 KB
• CRC32: 32fee492
• Source: Machines/Utility/ROMCatalogue.cpp:284-291, Machines/Utility/ROMLibrary.cpp:14534
• Built into binary. Required for CPC 664 model.

os6128.rom optional in repo standalone
CPC 6128 firmware

• Path: AmstradCPC/os6128.rom
• Size: 16.0 KB
• CRC32: 0219bb74
• Source: Machines/Utility/ROMCatalogue.cpp:292-299, Machines/Utility/ROMLibrary.cpp:14536
• Built into binary. Required for CPC 6128 model.

basic6128.rom optional in repo standalone
CPC 6128 BASIC ROM

• Path: AmstradCPC/basic6128.rom
• Size: 16.0 KB
• CRC32: ca6af63d
• Source: Machines/Utility/ROMCatalogue.cpp:300-307, Machines/Utility/ROMLibrary.cpp:14533
• Built into binary. Required for CPC 6128 model.

amsdos.rom optional in repo standalone
Amstrad Disk Operating System

• Path: AmstradCPC/amsdos.rom
• Size: 16.0 KB
• CRC32: 1fe22ecd
• Source: Machines/Utility/ROMCatalogue.cpp:253-260, Machines/Utility/ROMLibrary.cpp:14531
• Built into binary. Needed for CPC 664/6128 disk support.

apple2o.rom required in repo standalone
Original Apple II ROM

• Path: AppleII/apple2o.rom
• Size: 12.0 KB
• CRC32: ba210588
• Source: Machines/Utility/ROMCatalogue.cpp:336-343
• Required for original Apple II model

apple2.rom required in repo standalone
Apple II+ ROM

• Path: AppleII/apple2.rom
• Size: 12.0 KB
• CRC32: f66f9c26
• Source: Machines/Utility/ROMCatalogue.cpp:328-335
• Required for Apple II+ model

apple2eu.rom required in repo standalone
Apple IIe ROM

• Path: AppleII/apple2eu.rom
• Size: 32.0 KB
• CRC32: e12be18d
• Source: Machines/Utility/ROMCatalogue.cpp:320-327
• Required for Apple IIe model

apple2e.rom required in repo standalone
Enhanced Apple IIe ROM

• Path: AppleII/apple2e.rom
• Size: 32.0 KB
• CRC32: 65989942
• Source: Machines/Utility/ROMCatalogue.cpp:312-319
• Required for Enhanced IIe model

apple2-character.rom required in repo standalone
Apple II/II+ character ROM

• Path: AppleII/apple2-character.rom
• Size: 2.0 KB
• CRC32: 64f415c6
• Source: Machines/Utility/ROMCatalogue.cpp:344-351
• Required for Apple II and II+ models

apple2eu-character.rom required in repo standalone
Apple IIe character ROM

• Path: AppleII/apple2eu-character.rom
• Size: 4.0 KB
• CRC32: 816a86f1
• Source: Machines/Utility/ROMCatalogue.cpp:352-359
• Required for Apple IIe model

apple2e-character.rom required in repo standalone
Enhanced Apple IIe character ROM

• Path: AppleII/apple2e-character.rom
• Size: 4.0 KB
• CRC32: 2651014d
• Source: Machines/Utility/ROMCatalogue.cpp:360-367
• Required for Enhanced IIe model. Also used by Apple IIgs.

scsi.rom optional in repo standalone
Apple II SCSI card ROM

• Path: AppleII/scsi.rom
• Size: 16.0 KB
• CRC32: 5aff85d3
• Source: Machines/Utility/ROMCatalogue.cpp:368-375
• Conditional: needed for SCSI controller

apple2gs.rom required in repo standalone
Apple IIgs ROM01

• Path: AppleIIgs/apple2gs.rom
• Size: 128.0 KB
• CRC32: 42f124b0
• Source: Machines/Utility/ROMCatalogue.cpp:380-387
• Required for ROM01 model

apple2gs.rom2 required in repo standalone
Apple IIgs ROM03

• Path: AppleIIgs/apple2gs.rom2
• Size: 256.0 KB
• CRC32: de7ddf29
• Source: Machines/Utility/ROMCatalogue.cpp:388-395
• Required for ROM03 model (default)

apple2gs.chr required in repo standalone
Apple IIgs character ROM

• Path: AppleIIgs/apple2gs.chr
• Size: 4.0 KB
• CRC32: 91e53cd8
• Source: Machines/Utility/ROMCatalogue.cpp:396-403

341s0632-2 required in repo standalone
Apple IIgs ROM03 ADB microcontroller ROM

• Path: AppleIIgs/341s0632-2
• Size: 4.0 KB
• CRC32: e1c11fb0
• Source: Machines/Utility/ROMCatalogue.cpp:404-411

tos100.img required in repo standalone
UK TOS 1.00 ROM

• Path: AtariST/tos100.img
• Size: 192.0 KB
• CRC32: 1a586c64
• Source: Machines/Utility/ROMCatalogue.cpp:416-423

coleco.rom required in repo standalone
ColecoVision BIOS

• Path: ColecoVision/coleco.rom
• Size: 8.0 KB
• CRC32: 3aa93ef3
• Source: Machines/Utility/ROMCatalogue.cpp:496-503
• Platforms: lakka, recalbox, retroarch, retrobat, retrodeck, retropie

1540.bin optional in repo standalone
Commodore 1540 floppy drive ROM

• Path: Commodore1540/1540.bin
• Size: 16.0 KB
• CRC32: 718d42b1
• Source: Machines/Utility/ROMCatalogue.cpp:508-515
• Conditional: needed when VIC-20 has 1540 drive

1541.bin optional in repo standalone
Commodore 1541 floppy drive ROM

• Path: Commodore1540/1541.bin
• Size: 16.0 KB
• CRC32: fb760019
• Source: Machines/Utility/ROMCatalogue.cpp:516-523
• Conditional: needed when Plus/4 has 1541 drive

boot-16.rom optional in repo standalone
Disk II 16-sector boot ROM

• Path: DiskII/boot-16.rom
• Size: 256 B
• CRC32: ce7144f6
• Source: Machines/Utility/ROMCatalogue.cpp:528-535
• Conditional: needed for 16-sector disk controller

state-machine-16.rom optional in repo standalone
Disk II 16-sector state machine ROM

• Path: DiskII/state-machine-16.rom
• Size: 256 B
• CRC32: 9796a238
• Source: Machines/Utility/ROMCatalogue.cpp:536-543
• Conditional: needed for disk controller. Also used by Oric Pravetz.

boot-13.rom optional in repo standalone
Disk II 13-sector boot ROM

• Path: DiskII/boot-13.rom
• Size: 256 B
• CRC32: d34eb2ff
• Source: Machines/Utility/ROMCatalogue.cpp:544-551
• Conditional: needed for 13-sector disk controller

state-machine-13.rom optional in repo standalone
Disk II 13-sector state machine ROM

• Path: DiskII/state-machine-13.rom
• Size: 256 B
• CRC32: 62e22620
• Source: Machines/Utility/ROMCatalogue.cpp:552-559
• Conditional: needed for 13-sector disk controller

exos10.bin required in repo standalone
Enterprise EXOS ROM v1.0

• Path: Enterprise/exos10.bin
• Size: 32.0 KB
• CRC32: 30b26387
• Aliases: Exos (198x)(Enterprise).bin
• Source: Machines/Utility/ROMCatalogue.cpp:600-607
• One EXOS version required. Selected by target or any available.

exos20.bin required in repo standalone
Enterprise EXOS ROM v2.0

• Path: Enterprise/exos20.bin
• Size: 32.0 KB
• CRC32: d421795f
• Aliases: Expandible OS v2.0 (1984)(Intelligent Software).bin
• Source: Machines/Utility/ROMCatalogue.cpp:611-618
• Alternative EXOS version

exos21.bin required in repo standalone
Enterprise EXOS ROM v2.1

• Path: Enterprise/exos21.bin
• Size: 32.0 KB
• CRC32: 982a3b44
• Aliases: Expandible OS v2.1 (1985)(Intelligent Software).bin
• Source: Machines/Utility/ROMCatalogue.cpp:622-629
• Alternative EXOS version

exos23.bin required in repo standalone
Enterprise EXOS ROM v2.3

• Path: Enterprise/exos23.bin
• Size: 64.0 KB
• CRC32: 24838410
• Aliases: Expandible OS v2.3 (1987)(Intelligent Software).bin
• Source: Machines/Utility/ROMCatalogue.cpp:633-640
• Alternative EXOS version

basic10.bin required in repo standalone
Enterprise BASIC ROM v1.0

• Path: Enterprise/basic10.bin
• Size: 16.0 KB
• CRC32: d62e4fb7
• Source: Machines/Utility/ROMCatalogue.cpp:645-652
• One BASIC version required. v1.0 single-file version.

BASIC 1.0 - EPROM 1-2 (198x)(Enterprise).bin optional in repo standalone
Enterprise BASIC ROM v1.0, Part 1

• Path: Enterprise/BASIC 1.0 - EPROM 1-2 (198x)(Enterprise).bin
• Size: 8.0 KB
• CRC32: 37bf48e1
• Source: Machines/Utility/ROMCatalogue.cpp:653-660
• Alternative: both parts needed together as substitute for basic10.bin

BASIC 1.0 - EPROM 2-2 (198x)(Enterprise).bin optional in repo standalone
Enterprise BASIC ROM v1.0, Part 2

• Path: Enterprise/BASIC 1.0 - EPROM 2-2 (198x)(Enterprise).bin
• Size: 8.0 KB
• CRC32: c5298c79
• Source: Machines/Utility/ROMCatalogue.cpp:661-668
• Alternative: both parts needed together as substitute for basic10.bin

basic11.bin required in repo standalone
Enterprise BASIC ROM v1.1

• Path: Enterprise/basic11.bin
• Size: 16.0 KB
• CRC32: 683cf455
• Source: Machines/Utility/ROMCatalogue.cpp:669-676
• Alternative BASIC version

BASIC 1.1 - EPROM 1.1 (198x)(Enterprise).bin optional in repo standalone
Enterprise BASIC ROM v1.1, with trailing byte

• Path: Enterprise/BASIC 1.1 - EPROM 1.1 (198x)(Enterprise).bin
• Size: 16.0 KB
• CRC32: c96b7602
• Source: Machines/Utility/ROMCatalogue.cpp:677-684
• Alternative format of BASIC v1.1 with trailing byte

basic21.bin required in repo standalone
Enterprise BASIC ROM v2.1

• Path: Enterprise/basic21.bin
• Size: 16.0 KB
• CRC32: 55f96251
• Aliases: BASIC Interpreter v2.1 (1985)(Intelligent Software).bin, BASIC Interpreter v2.1 (1985)(Intelligent Software)[a].bin
• Source: Machines/Utility/ROMCatalogue.cpp:685-693
• Alternative BASIC version

epdos.bin optional in repo standalone
Enterprise EPDOS ROM

• Path: Enterprise/epdos.bin
• Size: 32.0 KB
• CRC32: 201319eb
• Aliases: EPDOS v1.7 (19xx)(Haluska, Laszlo).bin
• Source: Machines/Utility/ROMCatalogue.cpp:698-705
• Conditional: needed for EPDOS disk interface

exdos.bin optional in repo standalone
Enterprise EXDOS ROM

• Path: Enterprise/exdos.bin
• Size: 16.0 KB
• CRC32: e6daa0e9
• Aliases: EX-DOS EPROM (198x)(Enterprise).bin
• Source: Machines/Utility/ROMCatalogue.cpp:709-716
• Conditional: needed when DOS is set to EXDOS

mac128k.rom required in repo standalone
Macintosh 128k ROM

• Path: Macintosh/mac128k.rom
• Size: 64.0 KB
• CRC32: 6d0c8a28
• Source: Machines/Utility/ROMCatalogue.cpp:724-731
• Required for Macintosh 128k model

mac512k.rom required in repo standalone
Macintosh 512k ROM

• Path: Macintosh/mac512k.rom
• Size: 64.0 KB
• CRC32: cf759e0d
• Source: Machines/Utility/ROMCatalogue.cpp:732-739
• Required for Macintosh 512k model

macplus.rom required in repo standalone
Macintosh Plus ROM

• Path: Macintosh/macplus.rom
• Size: 128.0 KB
• CRC32: 4fa5b399
• Source: Machines/Utility/ROMCatalogue.cpp:740-751
• Required for Macintosh 512ke and Plus models

bios.sms optional in repo standalone north-america, europe
European/US Master System BIOS

• Path: MasterSystem/bios.sms
• Size: 8.0 KB
• CRC32: 0072ed54
• Source: Machines/Utility/ROMCatalogue.cpp:764-771
• Platforms: lakka, retroarch, retrodeck, retropie, rocknix, romm
• Optional. Boots cartridge directly if absent.

japanese-bios.sms optional in repo standalone japan
Japanese Master System BIOS

• Path: MasterSystem/japanese-bios.sms
• Size: 8.0 KB
• CRC32: 48d44a13
• Source: Machines/Utility/ROMCatalogue.cpp:756-763
• Optional. Used for Japan region. Boots without if absent.

msx.rom required in repo standalone
Generic MSX BIOS

• Path: MSX/MSX.ROM
• Size: 32.0 KB
• CRC32: 94ee12f3
• Aliases: MSX.ROM
• Source: Machines/Utility/ROMCatalogue.cpp:777-784
• Required for MSX1. Region bytes patched in memory if regional BIOS absent.

msx-japanese.rom optional in repo standalone japan
Japanese MSX BIOS

• Path: MSX/msx-japanese.rom
• Size: 32.0 KB
• CRC32: ee229390
• Source: Machines/Utility/ROMCatalogue.cpp:785-792
• Alternative to msx.rom for Japanese region

msx-american.rom optional in repo standalone north-america
American MSX BIOS

• Path: MSX/msx-american.rom
• Size: 32.0 KB
• Source: Machines/Utility/ROMCatalogue.cpp:793-800
• Alternative to msx.rom for American region

msx-european.rom optional in repo standalone europe
European MSX BIOS

• Path: MSX/msx-european.rom
• Size: 32.0 KB
• Source: Machines/Utility/ROMCatalogue.cpp:801-808
• Alternative to msx.rom for European region

disk.rom optional in repo standalone
MSX-DOS ROM

• Path: MSX/disk.rom
• Size: 16.0 KB
• CRC32: 721f61df
• Source: Machines/Utility/ROMCatalogue.cpp:809-816
• Platforms: lakka, recalbox, retroarch, retrodeck, retropie
• Conditional: needed for disk drive support

msx2.rom required in repo standalone
Generic MSX2 BIOS

• Path: MSX/MSX2.ROM
• Size: 32.0 KB
• CRC32: 6cdaf3a5
• Aliases: MSX2.ROM
• Source: Machines/Utility/ROMCatalogue.cpp:818-825
• Required for MSX2

msx2ext.rom required in repo standalone
MSX2 extension ROM

• Path: MSX/MSX2EXT.ROM
• Size: 16.0 KB
• CRC32: 66237ecf
• Aliases: MSX2EXT.ROM
• Source: Machines/Utility/ROMCatalogue.cpp:826-833
• Required for MSX2

fmpac.rom optional in repo standalone
MSX-MUSIC / FM-PAC ROM

• Path: MSX/fmpac.rom
• Size: 64.0 KB
• CRC32: 0e84505d
• Source: Machines/Utility/ROMCatalogue.cpp:834-841
• Platforms: retrobat
• Conditional: needed for MSX-Music support

basic10.rom required in repo standalone
Oric BASIC 1.0

• Path: Oric/basic10.rom
• Size: 16.0 KB
• CRC32: f18710b4
• Source: Machines/Utility/ROMCatalogue.cpp:870-877
• Platforms: recalbox
• Required for Oric-1 model

basic11.rom required in repo standalone
Oric BASIC 1.1

• Path: Oric/basic11.rom
• Size: 16.0 KB
• CRC32: c3a92bef
• Source: Machines/Utility/ROMCatalogue.cpp:878-885
• Platforms: batocera
• Required for Oric Atmos model

pravetz.rom required in repo standalone
Pravetz BASIC

• Path: Oric/pravetz.rom
• Size: 16.0 KB
• CRC32: 58079502
• Source: Machines/Utility/ROMCatalogue.cpp:886-893
• Required for Pravetz 8D model

colour.rom optional in repo standalone
Oric colour ROM (128-byte version)

• Path: Oric/colour.rom
• Size: 128 B
• CRC32: d50fca65
• Source: Machines/Utility/ROMCatalogue.cpp:846-853
• Platforms: batocera
• Optional. Enables colour video output.

ORIC.PAL-PROM-TBP24S10-1ab9b572.bin optional in repo standalone
Oric colour ROM (256-byte version)

• Path: Oric/ORIC.PAL-PROM-TBP24S10-1ab9b572.bin
• Size: 256 B
• CRC32: 1ab9b572
• Source: Machines/Utility/ROMCatalogue.cpp:854-861
• Optional. Alternative colour ROM.

PRAVETZ-8D.PAL-PROM-82S129-1576a69b.bin optional in repo standalone
Pravetz 8D colour ROM

• Path: Oric/PRAVETZ-8D.PAL-PROM-82S129-1576a69b.bin
• Size: 256 B
• CRC32: 1576a69b
• Source: Machines/Utility/ROMCatalogue.cpp:862-869
• Optional. Colour ROM for Pravetz model.

bd500.rom optional in repo standalone
Oric Byte Drive 500 ROM

• Path: Oric/bd500.rom
• Size: 8.0 KB
• CRC32: 61952e34
• Source: Machines/Utility/ROMCatalogue.cpp:894-901
• Platforms: recalbox
• Conditional: needed for Byte Drive 500 disk interface

jasmin.rom optional in repo standalone
Oric Jasmin ROM

• Path: Oric/jasmin.rom
• Size: 2.0 KB
• CRC32: 37220e89
• Source: Machines/Utility/ROMCatalogue.cpp:902-909
• Platforms: recalbox
• Conditional: needed for Jasmin disk interface

microdisc.rom optional in repo standalone
Oric Microdisc ROM

• Path: Oric/microdisc.rom
• Size: 8.0 KB
• CRC32: a9664a9c
• Source: Machines/Utility/ROMCatalogue.cpp:910-917
• Conditional: needed for Microdisc disk interface

8dos.rom optional in repo standalone
8DOS boot ROM

• Path: Oric/8dos.rom
• Size: 512 B
• CRC32: 49a74c06
• Source: Machines/Utility/ROMCatalogue.cpp:918-925
• Conditional: needed for Pravetz 8-DOS disk interface

GLABIOS_0.2.5_8T.ROM required in repo standalone
8088 GLaBIOS 0.2.5

• Path: PCCompatible/GLABIOS_0.2.5_8T.ROM
• Size: 8.0 KB
• CRC32: 9576944c
• Source: Machines/Utility/ROMCatalogue.cpp:930-937
• Required for XT-class emulation

GLaTICK_0.8.5_AT.ROM optional in repo standalone
AT GLaTICK 0.8.5 RTC option ROM

• Path: PCCompatible/GLaTICK_0.8.5_AT.ROM
• Size: 2.0 KB
• CRC32: 371ea3f1
• Source: Machines/Utility/ROMCatalogue.cpp:938-945
• XT-class RTC option ROM

Phoenix 80286 ROM BIOS Version 3.05.bin required in repo standalone
Phoenix 80286 BIOS 3.05

• Path: PCCompatible/Phoenix 80286 ROM BIOS Version 3.05.bin
• Size: 32.0 KB
• CRC32: 8d0d318a
• Source: Machines/Utility/ROMCatalogue.cpp:946-953
• Required for AT-class emulation (alternative to IBM AT BIOS)

at-bios.bin required in repo standalone
IBM PC AT BIOS v3

• Path: PCCompatible/at-bios.bin
• Size: 64.0 KB
• CRC32: 674426be
• Source: Machines/Utility/ROMCatalogue.cpp:954-961
• AT-class: single-file IBM AT BIOS (alternative to split U27/U47)

BIOS_5170_15NOV85_U27_61X9266_27256.BIN optional in repo standalone
IBM PC AT BIOS, Nov 1985, U27 chip

• Path: PCCompatible/BIOS_5170_15NOV85_U27_61X9266_27256.BIN
• Size: 32.0 KB
• CRC32: 4995be7a
• Source: Machines/Utility/ROMCatalogue.cpp:962-969
• AT-class: split BIOS, used with U47 chip

BIOS_5170_15NOV85_U47_61X9265_27256.BIN optional in repo standalone
IBM PC AT BIOS, Nov 1985, U47 chip

• Path: PCCompatible/BIOS_5170_15NOV85_U47_61X9265_27256.BIN
• Size: 32.0 KB
• CRC32: c32713e4
• Source: Machines/Utility/ROMCatalogue.cpp:970-977
• AT-class: split BIOS, used with U27 chip

CGA.F08 required in repo standalone
IBM CGA font

• Path: PCCompatible/CGA.F08
• Size: 2.0 KB
• CRC32: a362ffe6
• Source: Machines/Utility/ROMCatalogue.cpp:978-985
• Required for CGA video adapter

EUMDA9.F14 required in repo standalone
IBM MDA font

• Path: PCCompatible/EUMDA9.F14
• Size: 3.5 KB
• CRC32: 7754882a
• Source: Machines/Utility/ROMCatalogue.cpp:986-993
• Required for MDA video adapter

ibm_6277356_ega_card_u44_27128.bin optional in repo standalone
IBM EGA BIOS

• Path: PCCompatible/ibm_6277356_ega_card_u44_27128.bin
• Size: 16.0 KB
• CRC32: 2f2fbc40
• Source: Machines/Utility/ROMCatalogue.cpp:994-1001
• Needed for EGA video adapter

ibm_vga.bin optional in repo standalone
IBM VGA BIOS

• Path: PCCompatible/ibm_vga.bin
• Size: 32.0 KB
• CRC32: 03b3f90d
• Source: Machines/Utility/ROMCatalogue.cpp:1002-1009
• Needed for VGA video adapter

ibm-basic-1.10.rom optional in repo standalone
IBM ROM BASIC 1.10

• Path: PCCompatible/ibm-basic-1.10.rom
• Size: 32.0 KB
• CRC32: ebacb791
• Source: Machines/Utility/ROMCatalogue.cpp:1010-1017
• Required for AT-class with IBM BIOS (not needed with Phoenix)

basic.318006-01.bin required in repo standalone
C16+4 BASIC ROM

• Path: Plus4/basic.318006-01.bin
• Size: 16.0 KB
• CRC32: 74eaae87
• Source: Machines/Utility/ROMCatalogue.cpp:1046-1053

kernal.318004-05.bin required in repo standalone
C16+4 kernel, PAL-G revision 5

• Path: Plus4/kernal.318004-05.bin
• Size: 16.0 KB
• CRC32: 71c07bd4
• Source: Machines/Utility/ROMCatalogue.cpp:1038-1045
• Default kernel version requested by machine code

kernal.318004-03.bin optional in repo standalone
C16+4 kernel, PAL-G revision 3

• Path: Plus4/kernal.318004-03.bin
• Size: 16.0 KB
• CRC32: 77bab934
• Source: Machines/Utility/ROMCatalogue.cpp:1022-1029
• Alternative kernel version (in catalogue but not default)

kernal.318004-04.bin optional in repo standalone
C16+4 kernel, PAL-G revision 4

• Path: Plus4/kernal.318004-04.bin
• Size: 16.0 KB
• CRC32: be54ed79
• Source: Machines/Utility/ROMCatalogue.cpp:1030-1037
• Alternative kernel version (in catalogue but not default)

mo5-v1.0.rom required in repo standalone
Thomson MO5 ROM, version 1

• Path: Thomson/mo5-v1.0.rom
• Size: 16.0 KB
• CRC32: f62d2f3a
• Source: Machines/Utility/ROMCatalogue.cpp:1157-1164

mo5-v1.1.rom required in repo standalone
Thomson MO5 ROM, version 1.1

• Path: Thomson/mo5-v1.1.rom
• Size: 16.0 KB
• CRC32: 237c60bf
• Source: Machines/Utility/ROMCatalogue.cpp:1165-1172

mo6-v1.rom required in repo standalone
Thomson MO6 ROM, version 1

• Path: Thomson/mo6-v1.rom
• Size: 64.0 KB
• CRC32: 45e859c6
• Source: Machines/Utility/ROMCatalogue.cpp:1173-1180

mo6-v2.rom required in repo standalone
Thomson MO6 ROM, version 2

• Path: Thomson/mo6-v2.rom
• Size: 64.0 KB
• CRC32: b4430a3b
• Source: Machines/Utility/ROMCatalogue.cpp:1181-1188

mo6-v3.rom required in repo standalone
Thomson MO6 ROM, version 3

• Path: Thomson/mo6-v3.rom
• Size: 64.0 KB
• CRC32: 7a012322
• Source: Machines/Utility/ROMCatalogue.cpp:1189-1196

pc128.rom required in repo standalone
Olivetti Prodest PC128 ROM

• Path: Thomson/pc128.rom
• Size: 64.0 KB
• CRC32: fc173504
• Source: Machines/Utility/ROMCatalogue.cpp:1197-1204

cd90-640.rom optional in repo standalone
Thomson CD90-640 floppy controller ROM

• Path: Thomson/cd90-640.rom
• Size: 1.9 KB
• CRC32: 5114c0a5
• Source: Machines/Utility/ROMCatalogue.cpp:1206-1213
• Requested on top of the machine ROM when a disk is attached.

basic.bin required in repo standalone
VIC-20 BASIC ROM

• Path: Vic20/basic.bin
• Size: 8.0 KB
• CRC32: db4c43c1
• Source: Machines/Utility/ROMCatalogue.cpp:1218-1225

characters-english.bin required in repo standalone north-america, europe
English-language VIC-20 character ROM

• Path: Vic20/characters-english.bin
• Size: 4.0 KB
• CRC32: 83e032a6
• Source: Machines/Utility/ROMCatalogue.cpp:1226-1233
• Required for English region

kernel-pal.bin required in repo standalone europe
English-language PAL VIC-20 kernel ROM

• Path: Vic20/kernel-pal.bin
• Size: 8.0 KB
• CRC32: 4be07cb4
• Source: Machines/Utility/ROMCatalogue.cpp:1234-1241
• Required for English PAL region

kernel-ntsc.bin required in repo standalone north-america
English-language NTSC VIC-20 kernel ROM

• Path: Vic20/kernel-ntsc.bin
• Size: 8.0 KB
• CRC32: e5e7c174
• Source: Machines/Utility/ROMCatalogue.cpp:1242-1249
• Required for English NTSC region

characters-danish.bin optional in repo standalone denmark
Danish VIC-20 character ROM

• Path: Vic20/characters-danish.bin
• Size: 4.0 KB
• CRC32: 7fc11454
• Source: Machines/Utility/ROMCatalogue.cpp:1250-1257
• Required for Danish region

kernel-danish.bin optional in repo standalone denmark
Danish VIC-20 kernel ROM

• Path: Vic20/kernel-danish.bin
• Size: 8.0 KB
• CRC32: 02adaf16
• Source: Machines/Utility/ROMCatalogue.cpp:1258-1265
• Required for Danish region

characters-japanese.bin optional in repo standalone japan
Japanese VIC-20 character ROM

• Path: Vic20/characters-japanese.bin
• Size: 4.0 KB
• CRC32: fcfd8a4b
• Source: Machines/Utility/ROMCatalogue.cpp:1266-1273
• Required for Japanese region

kernel-japanese.bin optional in repo standalone japan
Japanese VIC-20 kernel ROM

• Path: Vic20/kernel-japanese.bin
• Size: 8.0 KB
• CRC32: 336900d7
• Source: Machines/Utility/ROMCatalogue.cpp:1274-1281
• Required for Japanese region

characters-swedish.bin optional in repo standalone sweden
Swedish VIC-20 character ROM

• Path: Vic20/characters-swedish.bin
• Size: 4.0 KB
• CRC32: d808551d
• Source: Machines/Utility/ROMCatalogue.cpp:1282-1289
• Required for Swedish region

kernel-swedish.bin optional in repo standalone sweden
Swedish VIC-20 kernel ROM

• Path: Vic20/kernel-swedish.bin
• Size: 8.0 KB
• CRC32: b2a60662
• Source: Machines/Utility/ROMCatalogue.cpp:1290-1297
• Required for Swedish region

48.rom optional in repo standalone
ZX Spectrum 48K ROM

• Path: ZXSpectrum/48.rom
• Size: 16.0 KB
• CRC32: ddee531f
• Source: Machines/Utility/ROMCatalogue.cpp:1302-1309, Machines/Utility/ROMLibrary.cpp:14539
• Platforms: lakka, retroarch, retropie, romm
• Built into binary. Required for 16K/48K model.

128.rom optional in repo standalone
ZX Spectrum 128K ROM

• Path: ZXSpectrum/128.rom
• Size: 32.0 KB
• CRC32: 2cbe8995
• Source: Machines/Utility/ROMCatalogue.cpp:1310-1317, Machines/Utility/ROMLibrary.cpp:14540
• Built into binary. Required for 128K model.

plus2.rom optional in repo standalone
ZX Spectrum +2 ROM

• Path: ZXSpectrum/plus2.rom
• Size: 32.0 KB
• CRC32: e7a517dc
• Source: Machines/Utility/ROMCatalogue.cpp:1318-1325, Machines/Utility/ROMLibrary.cpp:14541
• Built into binary. Required for +2 model.

plus3.rom optional in repo standalone
ZX Spectrum +2a/+3 ROM

• Path: ZXSpectrum/plus3.rom
• Size: 64.0 KB
• CRC32: 96e3c17a
• Source: Machines/Utility/ROMCatalogue.cpp:1326-1336, Machines/Utility/ROMLibrary.cpp:14542
• Built into binary. Required for +2a/+3 model.

zx80.rom optional in repo standalone
ZX80 BASIC ROM

• Path: ZX8081/zx80.rom
• Size: 4.0 KB
• CRC32: 4c7fc597
• Source: Machines/Utility/ROMCatalogue.cpp:1341-1348, Machines/Utility/ROMLibrary.cpp:14544
• Built into binary. Required for ZX80 model.

zx81.rom optional in repo standalone
ZX81 BASIC ROM

• Path: ZX8081/zx81.rom
• Size: 8.0 KB
• CRC32: 4b1dd6eb
• Source: Machines/Utility/ROMCatalogue.cpp:1349-1356, Machines/Utility/ROMLibrary.cpp:14545
• Built into binary. Required for ZX81 model.

Generated on 2026-08-23T16:12:06Z