MAME 2003-Plus - RetroBIOS

Type	libretro
Classification	enhanced_fork
Source	https://github.com/libretro/mame2003-plus-libretro
Upstream	https://www.mamedev.org
Version	2003-Plus
Profiled	2026-03-24
Cores	mame2003_plus
Systems	snk-neogeo-mvs, snk-neogeo-aes, igs-pgm, sega-stv, sega-megaplay, sega-megatech, deco-cassette, nintendo-playch10, nintendo-nss, super-kaneko-nova, konami-gx, zn1-capcom, zn2-capcom, zn1-taito, zn1-tecmo, zn1-video-system, zn1-acclaim, zn1-atlus, century-cvs
MAME version	0.78 (plus backports)

Technical notes

MAME 2003-Plus is a libretro port of MAME 0.78 with backported drivers, bug fixes, and new game support contributed after the original 0.78 snapshot. It targets low-end hardware (Raspberry Pi, handhelds) while expanding game compatibility beyond stock 0.78.

BIOS handling follows standard MAME conventions. Each arcade board with a shared BIOS defines a parent ROM set. Game drivers reference this parent, and the emulator merges the parent ZIP contents at load time.

BIOS ZIPs must be in {content_dir}/ (same folder as the game ROMs). The core resolves parent ROMs by walking the clone_of chain within the content directory only (osd_get_path returns content_path for FILETYPE_ROM).

ROM naming follows MAME 0.78 conventions with some updates from the Plus patches. Requires a mame2003-plus-specific romset for full CRC32/SHA1 compatibility.

Neo Geo uses mame.sm1, mamelo.lo, sfix.sfx naming. PGM uses pgm_p01s.rom naming. ZN-1/ZN-2 boards are present but most games are NOT_WORKING (incomplete PS1 emulation in the 0.78 codebase). PGM and ST-V have partial support.

Data files go in {system_dir}/mame2003-plus/. Samples in samples/ subfolder, artwork in artwork/ subfolder (both per-game ZIPs). hiscore.dat is compiled into the binary and auto-generated on first run if absent.

21 files | 16 required, 5 optional | 19 in repo, 2 missing Categories: 4 game data, 17 BIOS ZIPs

hiscore.dat -optional, game_data

• Source: src/hiscore.c:15,248
• high score definitions, compiled into binary and spawned on first run

cheat.dat -optional, game_data

• Source: src/cheat.c:383,8249-8255
• cheat definitions, requires cheats core option enabled

history.dat -optional, game_data

• Source: src/datafile.c:327,608
• game history and information database

mameinfo.dat -optional, game_data, missing from repo

• Source: src/datafile.c:327,638
• technical driver information, appended to history display

neogeo.zip -required, bios_zip

• System: snk-neogeo-mvs
• Source: src/drivers/neogeo.c:1677-1714
• Platforms: batocera, emudeck, lakka, recalbox, retroarch, retrobat, retrodeck, retropie
• MVS/AES BIOS, 15 variants including Universe BIOS 4.0
• Contents (18 entries):
  • sp-s2.sp1 -Europe MVS v2, default
  • sp-s.sp1 -Europe MVS v1
  • usa_2slt.bin -US MVS v2
  • sp-e.sp1 -US MVS v1
  • asia-s3.rom -Asia MVS v3
  • vs-bios.rom -Japan MVS v6
  • sp-j2.sp1 -Japan MVS v2
  • uni-bios_4_0.rom -Universe BIOS 4.0, hack
  • uni-bios_3_3.rom -Universe BIOS 3.3, hack
  • uni-bios_2_0.rom -Universe BIOS 2.0, hack
  • ... and 8 more

pgm.zip -required, bios_zip

• System: igs-pgm
• Source: src/drivers/pgm.c:3459-3468
• Platforms: lakka, retroarch, retrodeck, retropie
• PGM system BIOS - 68K program, text tiles, samples
• Contents (3 entries):
  • pgm_p01s.rom -68K BIOS -128.0 KB
  • pgm_t01s.rom -text tiles -2.0 MB
  • pgm_m01s.rom -samples -2.0 MB

stvbios.zip -required, bios_zip

• System: sega-stv
• Source: src/drivers/stv.c:3741-3767
• Platforms: lakka, recalbox, retroarch, retrobat, retrodeck, retropie
• ST-V (Saturn-based arcade) BIOS, 6 region variants
• Contents (6 entries):
  • epr19730.ic8 -Japan
  • mp17951a.s -Japan alt
  • mp17952a.s -USA
  • 20091.bin -Japan alt 2
  • mp17953a.ic8 -Taiwan
  • mp17954a.s -Europe

megaplay.zip -required, bios_zip

• System: sega-megaplay
• Source: src/drivers/segac2.c:5794-5804
• Platforms: retrodeck
• Mega Play BIOS, 2 versions
• Contents (2 entries):
  • ep15294.ic2 -Mega Play BIOS v1
  • megaplay.bin -Mega Play BIOS v2

megatech.zip -required, bios_zip

• System: sega-megatech
• Source: src/drivers/segac2.c:5434-5437
• Platforms: retrodeck
• Mega Tech BIOS - menu/instruction screen processor
• Contents (1 entries):
  • epr12664.20 -Mega Tech BIOS -32.0 KB

decocass.zip -required, bios_zip

• System: deco-cassette
• Source: src/drivers/decocass.c:696-727
• Platforms: lakka, retroarch, retrodeck, retropie
• DECO Cassette shared BIOS - 6502 CPU, sound, MCU, PROMs
• Contents (7 entries):
  • v0a-.7e -6502 BIOS variant A
  • rms8.cpu -6502 BIOS variant B
  • rms8.snd -audio CPU -2.0 KB
  • cass8041.bin -MCU -1.0 KB
  • dsp8.3m -PROM
  • dsp8.10d -PROM
  • rms8.j3 -DRAM banking PROM

playch10.zip -required, bios_zip

• System: nintendo-playch10
• Source: src/drivers/playch10.c:815-827
• Platforms: retrodeck
• PlayChoice-10 BIOS - Z80 main CPU + character ROMs + PROMs
• Contents (7 entries):
  • pch1-c.8t -Z80 BIOS -16.0 KB
  • pch1-c.8p -character ROM
  • pch1-c.8m -character ROM
  • pch1-c.8k -character ROM
  • 82s129.6f -color PROM
  • 82s129.6e -color PROM
  • 82s129.6d -color PROM

nss.zip -required, bios_zip

• System: nintendo-nss
• Source: src/drivers/nss.c:260-269
• Platforms: retrodeck
• Nintendo Super System BIOS - SPC700 boot ROM + BIOS CPU
• Contents (3 entries):
  • spc700.rom -SPC700 boot ROM -64 B
  • nss-c.dat -NSS BIOS CPU -32.0 KB
  • nss-ic14.02 -NSS BIOS CPU alt -32.0 KB

skns.zip -required, bios_zip

• System: super-kaneko-nova
• Source: src/drivers/suprnova.c:1226-1229
• Platforms: lakka, retroarch, retrodeck, retropie
• Super Kaneko Nova System BIOS, 4 region variants
• Contents (4 entries):
  • sknsj1.u10 -Japan BIOS -512.0 KB
  • sknse1.u10 -Europe BIOS -512.0 KB
  • sknsa1.u10 -Asia BIOS -512.0 KB
  • sknsu1.u10 -USA BIOS -512.0 KB

konamigx.zip -required, bios_zip

• System: konami-gx
• Source: src/drivers/konamigx.c:2404
• Platforms: retrodeck
• Konami System GX BIOS
• Contents (1 entries):
  • 300a01.34k -GX BIOS -128.0 KB

cpzn1.zip -required, bios_zip

• System: zn1-capcom
• Source: src/drivers/zn.c:1016-1018
• Capcom ZN-1 BIOS (PS1-based). Most games NOT_WORKING
• Contents (1 entries):
  • coh1002c.bin -Capcom ZN-1 BIOS -512.0 KB

cpzn2.zip -required, bios_zip

• System: zn2-capcom
• Source: src/drivers/zn.c:1274-1276
• Capcom ZN-2 BIOS (PS1-based). Most games NOT_WORKING
• Contents (1 entries):
  • coh3002c.bin -Capcom ZN-2 BIOS -512.0 KB

taitofx1.zip -required, bios_zip

• System: zn1-taito
• Source: src/drivers/zn.c:1579-1581
• Taito FX-1 BIOS (PS1-based). Most games NOT_WORKING
• Contents (1 entries):
  • coh1002t.bin -Taito FX-1 BIOS -512.0 KB

tps.zip -required, bios_zip

• System: zn1-tecmo
• Source: src/drivers/zn.c:1466-1468
• Tecmo TPS BIOS (PS1-based). Most games NOT_WORKING
• Contents (1 entries):
  • coh1002m.bin -Tecmo TPS BIOS -512.0 KB

sncwgltd.zip -optional, bios_zip, missing from repo

• System: zn1-video-system
• Source: src/drivers/zn.c:1555-1557
• Video System KN BIOS (PS1-based). NOT_WORKING
• Contents (1 entries):
  • coh1002v.bin -KN BIOS -512.0 KB

acpsx.zip -required, bios_zip

• System: zn1-acclaim
• Source: src/drivers/zn.c:1815-1817
• Acclaim PSX BIOS (PS1-based). NOT_WORKING
• Contents (1 entries):
  • coh1000a.bin -Acclaim PSX BIOS -512.0 KB

cvs.zip -required, bios_zip

• System: century-cvs
• Source: src/drivers/cvs.c:475-482,1393
• Contents (3 entries):
  • 5b.bin -sound CPU -2.0 KB
  • 82s185.10h -PROM -2.0 KB
  • 82s123.10k -PROM -32 B

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