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# FB Alpha 2012 Neo Geo - RetroBIOS

Type | libretro
Classification | frozen_snapshot
Source | https://github.com/libretro/fbalpha2012_neogeo
Upstream | https://www.fbalpha.com
Version | v0.2.97.29
Profiled | 2026-03-23
Cores | fbalpha2012_neogeo
Systems | neogeo

Technical notes

Frozen snapshot of Final Burn Alpha v0.2.97.29 (circa 2012), Neo Geo only. Exists for RAM-constrained platforms. Most users should use FBNeo.

Neo Geo requires a BIOS ROM set (neogeo.zip) placed alongside game ROMs. The BIOS set contains ~35 variants (d_neogeo.cpp:903-981), all BRF_BIOS:

68K main BIOS (BRF_SELECT, one active at a time): asia-s3.rom 0x91b64be3 MVS Asia/Europe ver. 6 (default) sp-s2.sp1 0x9036d879 MVS Asia/Europe ver. 5 sp-s.sp1 0xc7f2fa45 MVS Asia/Europe ver. 3 (4 slot) sp-u2.sp1 0xe72943de MVS USA ver. 5 (2 slot) sp-e.sp1 0x2723a5b5 MVS USA ver. 5 (6 slot) vs-bios.rom 0xf0e8f27d MVS Japan ver. 6 sp-j2.sp1 0xacede59c MVS Japan ver. 5 sp1.jipan.1024 0x9fb0abe4 MVS Japan ver. 3 (4 slot) sp-45.sp1 0x03cc9f6a NEO-MVH MV1C (512 KB) japan-j3.bin 0xdff6d41f MVS Japan (J3) neo-po.bin 0x16d0c132 AES Japan neo-epo.bin 0xd27a71f1 AES Asia neodebug.bin 0x698ebb7d Development Kit sp-1v1_3db8c.bin 0x162f0ebe Deck ver. 6 (Git Ver 1.3) uni-bios_4_0.rom 0xa7aab458 Universe BIOS 4.0 (+ 14 more Universe BIOS variants, versions 1.0-3.3) neopen.sp1 0xcb915e76 NeoOpen BIOS v0.1 beta

System ROMs (always required): sm1.sm1 0x94416d67 Z80 BIOS (sound program) sfix.sfix 0xc2ea0cfd Text layer tiles (fix layer) 000-lo.lo 0x5a86cff2 Zoom table

Special sets: 236-bios.sp1 0x853e6b96 Trackball BIOS sp-4x.sp1 0xb4590283 PCB BIOS spj.sp1 0x148dd727 PCB BIOS (Japan) neocd.bin 0xdf9de490 Neo Geo CD BIOS

neogeo.zip is a parent ROM set, loaded from g_rom_dir alongside game ZIPs. g_system_dir is set (libretro.cpp:3016) but never used for file loading.

The .info note "BIOS files must be inside the ROM directory" is accurate here: neogeo.zip must be in the same directory as game ROM ZIPs.

No BIOS or firmware files required.

Why no files

Neo Geo BIOS is a parent ROM set (neogeo.zip) placed in the ROM directory alongside game ZIPs. Not a system directory file — follows arcade ROM set convention.

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