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XRoar
Type standalone
Source https://www.6809.org.uk/git/xroar.git
Upstream https://www.6809.org.uk/xroar/
Version 1.12.1
Profiled 2026-10-20
Profile YAML, JSON
Cores xroar
Systems dragon32, dragon64, coco, coco3, mc10
Technical notes

XRoar by Ciaran Anscomb emulates Dragon 32/64, Tandy CoCo 1/2/3, MC-10, Alice, and clones (MX-1600, CP-400, Dragon 200-E, Deluxe CoCo). ROM files are searched in a configurable rompath directory with automatic extension appending (.rom, .ROM, .dgn, .DGN). Batocera sets rompath to /userdata/bios/xroar/.

The romlist mechanism defines fallback filenames per ROM slot. Each machine type has a default romlist that tries filenames in priority order. CRC32 is computed for loaded ROMs and matched against known-good values for breakpoint and feature detection, but mismatches do not prevent loading. A ROM metadata table (src/rom.c) maps CRC32 and size to a description, the debugger symbol table and, for a file inserted as a cartridge, the cartridge type. It names images, it does not accept or reject them.

Machine selection: Batocera maps system names to default machines via xroarGenerator.py (mc10 -> mc10, dragon64 -> dragon64, others -> coco2bus).

42 files | 16 required, 26 optional | 42 in repo, 0 missing

d32.rom required in repo #
Dragon 32 BASIC ROM

  • System: dragon32
  • Size: 16.0 KB
  • CRC32: e3879310
  • Aliases: dragon32, d32rom, Dragon Data Ltd - Dragon 32 - IC17
  • Validation: crc32
  • Source: src/xroar.c:649, src/dragon/dragon32.c:40, src/dragon/dragon32.c:107, src/dragon/dragon32.c:110-116, src/dragon/dragon32.c:131-132
  • Collection copy: bios/Dragon/Dragon/d32.rom
  • Platforms: recalbox dragon/d32.rom, retrobat dragon/d32.rom
  • Combined 16K ROM. Loaded into a single 16384-byte rombank slot.

d64_1.rom required in repo #
Dragon 64 32K mode BASIC ROM

  • System: dragon64
  • Size: 16.0 KB
  • CRC32: 84f68bf9
  • Aliases: d64rom1, dragrom, Dragon Data Ltd - Dragon 64 - IC17, Dragon Data Ltd - TANO IC18, Eurohard S.A. - Dragon 200 IC18
  • Validation: crc32
  • Source: src/xroar.c:647, src/xroar.c:653, src/dragon/dragon64.c:151-157, src/dragon/dragon64.c:169-171
  • Collection copy: bios/Dragon/Dragon/alpha-basic.rom
  • Platforms: recalbox dragon/d200rom1.rom, dragon/d64tano.rom, retrodeck bios/d200rom1.rom, bios/d64tano.rom
  • IC17 ROM. Required for the machine to start.

d64_2.rom optional in repo #
Dragon 64 64K mode BASIC ROM

  • System: dragon64
  • Size: 16.0 KB
  • CRC32: 17893a42
  • Aliases: d64rom2, Dragon Data Ltd - Dragon 64 - IC18, Dragon Data Ltd - TANO IC17, Eurohard S.A. - Dragon 200 IC17
  • Validation: crc32
  • Source: src/xroar.c:648, src/xroar.c:654, src/dragon/dragon64.c:160-166, src/dragon/dragon64.c:174-176
  • Collection copy: bios/Dragon/Dragon/d200rom2.rom
  • Platforms: recalbox dragon/d200rom2.rom, dragon/d64rom2.rom, dragon/d64tano2.rom, retrobat dragon/d64_2.rom, retrodeck bios/d200rom2.rom, bios/d64tano2.rom
  • IC18 ROM. 64K mode alternate BASIC. Machine starts without it (32K mode only).

d200e_1.rom required in repo spain #
Dragon 200-E BASIC IC18 (Spanish)

  • System: dragon64
  • Size: 16.0 KB
  • CRC32: 95af0a0a
  • Aliases: d200e_rom1, ic18_v1.4e.ic34
  • Validation: crc32
  • Source: src/xroar.c:650, src/xroar.c:656, src/xroar.c:741
  • Collection copy: bios/Dragon/Dragon/d200e_1.rom
  • Required for Dragon 200-E. Falls back to d64_1 then generic dragon if not found.

d200e_2.rom optional in repo spain #
Dragon 200-E BASIC IC17 (Spanish)

  • System: dragon64
  • Size: 16.0 KB
  • CRC32: 48b985df
  • Aliases: d200e_rom2, ic17_v1.4e.ic37
  • Source: src/xroar.c:651, src/xroar.c:657, src/rom.c:91
  • Collection copy: bios/Dragon/Dragon/d200e_2.rom
  • 64K mode alternate. Falls back to d64_2 if not found.

d200e_26.rom optional in repo spain #
Dragon 200-E external character generator ROM

  • System: dragon64
  • Size: 4.0 KB
  • CRC32: 565724bc
  • Aliases: rom26.ic1
  • Source: src/xroar.c:658, src/dragon/dragon.c:430-447, src/rom.c:92
  • Collection copy: bios/Dragon/Dragon/d200e_26.rom
  • Spanish character set. Loaded into a 4096-byte rombank. Machine works without it (uses standard charset).

alpha-boot-v1.0.rom required in repo #
Dragon Professional (Alpha) boot ROM v1.0

  • System: dragon64
  • Size: 8.0 KB
  • CRC32: c3dab585
  • Aliases: alpha_bt_10, Dragon Data Ltd - Dragon Alpha Boot v1.0 150584
  • Validation: crc32
  • Source: src/xroar.c:660, src/xroar.c:747, src/dragon/dragonpro.c:246, src/dragon/dragonpro.c:251-254, src/dragon/dragonpro.c:269
  • Collection copy: bios/Dragon/Dragon/alpha-boot-v1.0.rom
  • Required for Dragon Professional machine. Loaded as extbas_rom into the BOOT bank. rombank_verify_crc accepts any member of @dragonpro_boot, which also holds 0xd6172b56 for the v0.4 slot.

alpha-boot-v0.4.rom optional in repo #
Dragon Professional (Alpha) boot ROM v0.4

  • System: dragon64
  • Size: 8.0 KB
  • CRC32: d6172b56
  • Aliases: alpha_bt_04
  • Validation: crc32
  • Source: src/xroar.c:660, src/xroar.c:747, src/dragon/dragonpro.c:246, src/rom.c:93
  • Collection copy: bios/Other/xroar/alpha-boot-v0.4.rom
  • Fourth and fifth candidates of the dragonpro_boot romlist, tried when no v1.0 image is found. The dragonpro_boot crclist carries 0xd6172b56 next to the v1.0 value, and the ROM metadata table names it Dragon Professional Boot 0.4.

alpha-basic.rom required in repo #
Dragon Professional (Alpha) BASIC ROM

  • System: dragon64
  • Size: 16.0 KB
  • CRC32: 84f68bf9
  • Aliases: alpha_ba, Dragon Data Ltd - Dragon Alpga Basic
  • Validation: crc32
  • Source: src/xroar.c:661, src/xroar.c:748, src/dragon/dragonpro.c:247, src/dragon/dragonpro.c:260-263, src/dragon/dragonpro.c:274
  • Collection copy: bios/Dragon/Dragon/alpha-basic.rom
  • Platforms: recalbox dragon/d200rom1.rom, dragon/d64tano.rom, retrodeck bios/d200rom1.rom, bios/d64tano.rom
  • Loaded as altbas_rom into the 32K BASIC bank. Falls back to d64_1 if not found.

bas13.rom required in repo #
Tandy CoCo Colour BASIC 1.3

  • System: coco
  • Size: 8.0 KB
  • CRC32: d8f4d15e
  • Validation: crc32
  • Source: src/xroar.c:663, src/xroar.c:753, src/dragon/coco.c:154-160, src/dragon/coco.c:166-168
  • Collection copy: bios/Tandy/CoCo/bas13.rom
  • Platforms: recalbox trs80coco/bas13.rom, retrodeck bios/bas13.rom
  • Default Colour BASIC. First tried in the @coco romlist. 8K ROM loaded into slot 1 of a 2-slot rombank.

bas12.rom optional in repo #
Tandy CoCo Colour BASIC 1.2

  • System: coco
  • Size: 8.0 KB
  • CRC32: 54368805
  • Aliases: Color Basic v1.2 (1982)(Tandy)
  • Validation: crc32
  • Source: src/xroar.c:663, src/xroar.c:752
  • Collection copy: bios/Tandy/CoCo/bas12.rom
  • Platforms: recalbox trs80coco/bas12.rom, retrodeck bios/bas12.rom
  • Alternative to bas13. Second in fallback order.

bas11.rom optional in repo #
Tandy CoCo Colour BASIC 1.1

  • System: coco
  • Size: 8.0 KB
  • CRC32: 6270955a
  • Validation: crc32
  • Source: src/xroar.c:663, src/xroar.c:751
  • Collection copy: bios/Tandy/CoCo/bas11.rom
  • Platforms: recalbox trs80coco/bas11.rom, retrodeck bios/bas11.rom
  • Used by CoCo 1E. Third in fallback order.

bas10.rom optional in repo #
Tandy CoCo Colour BASIC 1.0

  • System: coco
  • Size: 8.0 KB
  • CRC32: 00b50aaa
  • Validation: crc32
  • Source: src/xroar.c:663, src/xroar.c:750
  • Collection copy: bios/Tandy/CoCo/bas10.rom
  • Platforms: recalbox trs80coco/bas10.rom, retrodeck bios/bas10.rom
  • Earliest version. Used by original CoCo 1. Last in fallback order.

extbas11.rom required in repo #
Tandy CoCo Extended Colour BASIC 1.1

  • System: coco
  • Size: 8.0 KB
  • CRC32: a82a6254
  • Validation: crc32
  • Source: src/xroar.c:664, src/xroar.c:758, src/dragon/coco.c:145-151, src/dragon/coco.c:170-171
  • Collection copy: bios/Tandy/CoCo/extbas11.rom
  • Platforms: recalbox trs80coco/extbas11.rom, retrodeck bios/extbas11.rom
  • Default Extended BASIC. 8K ROM loaded into slot 0 of a 2-slot rombank.

extbas10.rom optional in repo #
Tandy CoCo Extended Colour BASIC 1.0

  • System: coco
  • Size: 8.0 KB
  • CRC32: e031d076
  • Validation: crc32
  • Source: src/xroar.c:664, src/xroar.c:757
  • Collection copy: bios/Tandy/CoCo/extbas10.rom
  • Platforms: recalbox trs80coco/extbas10.rom, retrodeck bios/extbas10.rom
  • Earlier version. Second in fallback order.

coco3.rom required in repo #
CoCo 3 Super Extended Colour BASIC (NTSC)

  • System: coco3
  • Size: 32.0 KB
  • CRC32: b4c88d6c
  • Validation: crc32
  • Source: src/xroar.c:694, src/xroar.c:768, src/coco3.c:258-260, src/coco3.c:535-549
  • Collection copy: bios/Tandy/CoCo/coco3.rom
  • Platforms: misterfpga COCO3/boot0.rom, recalbox trs80coco/coco3.rom, retrodeck bios/coco3.rom
  • 32K combined ROM. Single required ROM for CoCo 3 NTSC.

coco3p.rom required in repo #
CoCo 3 Super Extended Colour BASIC (PAL)

  • System: coco3
  • Size: 32.0 KB
  • CRC32: ff050d80
  • Validation: crc32
  • Source: src/xroar.c:695, src/xroar.c:510, src/xroar.c:519, src/xroar.c:768, src/coco3.c:535-549, src/rom.c:119
  • Collection copy: bios/Tandy/CoCo/coco3p.rom
  • Platforms: recalbox trs80coco/coco3p.rom, retrodeck bios/coco3p.rom
  • PAL variant of the CoCo 3 ROM. Required for PAL CoCo 3 machines.

mc10.rom required in repo #
Tandy MC-10 Microcolour BASIC

  • System: mc10
  • Size: 8.0 KB
  • CRC32: 11fda97e
  • Validation: crc32
  • Source: src/xroar.c:701, src/xroar.c:773, src/mc10.c:169-171, src/mc10.c:423-434
  • Collection copy: bios/Tandy/CoCo/mc10.rom
  • Platforms: recalbox trs80coco/mc10.rom
  • Single required ROM for MC-10.

alice.rom required in repo france #
Matra & Hachette Alice Microcolour BASIC

  • System: mc10
  • Size: 8.0 KB
  • CRC32: f876abe9
  • Validation: crc32
  • Source: src/xroar.c:703, src/xroar.c:775, src/mc10.c:169-171
  • Collection copy: bios/Tandy/CoCo/alice.rom
  • Platforms: recalbox trs80coco/alice4k.rom
  • French Alice variant. Required for Alice machine. MC-10 compatible.

deluxe.rom required in repo #
Tandy Deluxe CoCo Advanced BASIC (bank 0)

  • System: coco
  • CRC32: 1cce231e
  • Aliases: adv070_u24
  • Validation: crc32
  • Source: src/xroar.c:679, src/xroar.c:763, src/dragon/deluxecoco.c:213-216
  • Collection copy: bios/Tandy/CoCo/deluxe.rom
  • Primary ROM for the Deluxe CoCo prototype. Loaded as extbas_rom.

adv071_u24.rom optional in repo #
Tandy Deluxe CoCo ROM bank 1

adv072_u24.rom optional in repo #
Tandy Deluxe CoCo ROM bank 2

adv073-2_u24.rom optional in repo #
Tandy Deluxe CoCo ROM bank 3

mx1600bas.rom required in repo #
Dynacom MX-1600 Colour BASIC

  • System: coco
  • CRC32: d918156e
  • Aliases: mx1600bas_zephyr
  • Validation: crc32
  • Source: src/xroar.c:685, src/xroar.c:754
  • Collection copy: bios/Tandy/CoCo/mx1600bas.rom
  • Platforms: recalbox trs80coco/mx1600bas.rom
  • Required for MX-1600. Zephyr-patched variant (CRC32 d11b1c96) is an alias.

mx1600extbas.rom required in repo #
Dynacom MX-1600 Extended Colour BASIC

cp400bas.rom required in repo #
Prologica CP-400 Colour BASIC

cp400ext.rom required in repo #
Prologica CP-400 Extended Colour BASIC

disk11.rom optional in repo #
Tandy RS-DOS 1.1 (CoCo floppy disk controller)

  • System: coco
  • Size: 8.0 KB
  • CRC32: 0b9c5415
  • Source: src/xroar.c:714, src/rsdos.c:176, src/rom.c:150
  • Collection copy: bios/Tandy/CoCo/disk11.rom
  • Platforms: misterfpga COCO3/boot1.rom, recalbox trs80coco/disk11.rom, retrodeck bios/disk11.rom, bios/fd502.rom
  • Primary CoCo disk controller ROM. disk10.rom (RS-DOS 1.0) is an earlier version used as fallback.

hdbdw3bck.rom optional in repo #
RS-DOS with Becker port (DriveWire)

  • System: coco
  • Source: src/xroar.c:724, src/xroar.c:578-580
  • Collection copy: bios/Tandy/CoCo/hdbdw3bck.rom
  • Platforms: recalbox trs80coco/hdbdw3bck.rom
  • For CoCo with Becker port hardware. Enables DriveWire connectivity.

ddos12a.rom optional in repo #
DragonDOS 1.2a (Dragon floppy disk controller)

  • System: dragon64
  • Source: src/xroar.c:708, src/dragondos.c:173
  • Collection copy: bios/Dragon/Dragon/ddos12a.rom
  • Platforms: recalbox dragon/ddos12a.rom, retrodeck bios/ddos12a.rom
  • Latest DragonDOS version. Fallback chain tries DOSPlus -> SuperDOS -> DragonDOS -> Cumana. Older versions: ddos12, ddos40, ddos15, ddos10.

dplus49b.rom optional in repo #
DOSPlus 4.9b (Dragon compatible DOS)

  • System: dragon64
  • Size: 8.0 KB
  • CRC32: 7c6dfca8
  • Source: src/xroar.c:709, src/rom.c:138
  • Collection copy: bios/Dragon/Dragon/dplus49b.rom
  • Platforms: recalbox dragon/dplus49b.rom, retrodeck bios/dplus49b.rom
  • First tried in DragonDOS-compatible cartridge. Enhanced Dragon DOS. Older version: dplus48 (alias: dosplus-4.8, DOSPLUS).

sdose6.rom optional in repo #
SuperDOS E6 (Dragon compatible DOS)

  • System: dragon64
  • Size: 8.0 KB
  • CRC32: 8c1d6c45
  • Aliases: PNP - SuperDOS E6
  • Source: src/xroar.c:710, src/rom.c:141
  • Collection copy: bios/Dragon/Dragon/sdose6.rom
  • Platforms: recalbox dragon/sdose6.rom, retrodeck bios/sdose6.rom
  • Latest SuperDOS. Older versions: sdose5, sdose4.

cdos20.rom optional in repo #
Cumana DOS 2.0 (Dragon compatible DOS)

delta2.rom optional in repo #
Delta System 2 (Premier Microsystems disk controller)

  • System: dragon64
  • Size: 8.0 KB
  • CRC32: 307fb37c
  • Aliases: Premier Micros - DeltaDOS
  • Source: src/xroar.c:717, src/deltados.c:160, src/rom.c:146
  • Collection copy: bios/Dragon/Dragon/delta2.rom
  • Platforms: recalbox dragon/deltados.rom, retrodeck bios/deltados.rom
  • Latest Delta version. Older versions: delta1a, delta19, delta, deltados.

cp450dsk.rom optional in repo #
Prologica CP-450 DOS cartridge

orch90.rom optional in repo #
Orchestra-90 CC sound cartridge ROM

  • System: coco
  • Size: 8.0 KB
  • CRC32: 15fb39af
  • Source: src/orch90.c:122, src/rom.c:313
  • Collection copy: bios/Tandy/CoCo/orch90.rom
  • Platforms: misterfpga COCO3/boot2.rom
  • Sound synthesis cartridge. Loaded directly (no romlist fallback).

mcx128.rom optional in repo #
MCX128 memory expansion BASIC ROM

  • System: mc10
  • Aliases: MCX_Basic_21
  • Source: src/xroar.c:730, src/mcx128.c:208
  • Collection copy: bios/Tandy/MC-10/mcx128.rom
  • 128K memory expansion for MC-10. Adds enhanced BASIC.

mcx128a.rom optional in repo #
MCX128 memory expansion BASIC ROM (AZERTY)

  • System: mc10
  • Aliases: MCX_Basic_21_AZERTY
  • Source: src/xroar.c:731, src/xroar.c:638-639
  • Collection copy: bios/Tandy/MC-10/mcx128a.rom
  • AZERTY keyboard variant for Alice. Same MCX128 hardware.

yados.rom optional in repo #
YADOS (Glenside IDE interface ROM)

  • System: coco
  • Source: src/xroar.c:696, src/idecart.c:208
  • Collection copy: bios/Dragon/Dragon/yados.rom
  • IDE hard disk interface. Fallback: hdblba.rom (alternative IDE ROM).

sdbdos.rom optional in repo #
SDBDOS (MOOH memory cartridge ROM)

dragonfly-2.3.rom optional in repo #
Ikon Ultra Drive Dragonfly ROM 2.3

  • System: dragon64
  • Source: src/xroar.c:721, src/ikon.c:151, src/ikon.c:26
  • Collection copy: bios/Dragon/Dragon/dragonfly-2.3.rom
  • Experimental, compiled only with WANT_EXPERIMENTAL. Ikon Ultra Drive storage interface. First candidate of the ikon romlist. No crclist entry names it.

dragonfly-1.3.rom optional in repo #
Ikon Ultra Drive Dragonfly ROM 1.3

  • System: dragon64
  • Source: src/xroar.c:721, src/ikon.c:151, src/romlist.c:46-48
  • Collection copy: bios/Dragon/Dragon/dragonfly-1.3.rom
  • Experimental. Second candidate of the ikon romlist, loaded when dragonfly-2.3 is absent. romlist_find appends the extensions "", .rom, .ROM, .dgn, .DGN in that order. ikon.c loads the bank through cart_rom_init and checks nothing: no crclist entry names this ROM.

Generated on 2026-10-20T03:49:43Z