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# nekop2 - RetroBIOS

Type | libretro
Classification | community_fork
Source | https://github.com/libretro/libretro-meowPC98
Upstream | https://np2.yui.ne.jp (dead; source preserved in libretro repo)
Version | 0.86
Profiled | 2026-03-24
Cores | nekop2
Systems | pc-98

12 files | 0 required, 12 optional | 10 in repo, 2 missing | 5 with HLE fallback

`bios.rom` -optional, HLE available

- Path: `np2/bios.rom`
- Source: `bios/bios.c:232-235, common/strres.c:53`
- Platforms: lakka, recalbox, retroarch, retrodeck, retropie
- PC-9801 system BIOS ROM (96 KB). The core boots without it using the built-in BIOS simulator, but some software requires the real BIOS.

`bios9821.rom` -optional

- Path: `np2/bios9821.rom`
- Source: `bios/bios.c:262-266, libretro/compiler.h:169`
- Platforms: retrodeck
- PC-9821 extension BIOS ROM (8 KB). For PC-9821 mode support. Mapped at 0xd8000.

`font.bmp` -optional, HLE available

- Path: `np2/font.bmp`
- Aliases: `FONT.ROM`
- Source: `libretro/libretro.c:862, font/font.c:113, font/fontdata.c:12`
- Platforms: batocera, lakka, recalbox, retroarch, retrobat, retrodeck, retropie
- PC-98 font bitmap (288 KB). Required for correct Japanese kanji display. Without this, only basic ASCII renders using built-in 8x8 data. FONT.ROM (V98 format) is also accepted.

`sound.rom` -optional, HLE available

- Path: `np2/sound.rom`
- Source: `sound/soundrom.c:15-16,21-55,65-78`
- Platforms: lakka, recalbox, retroarch, retrodeck, retropie
- FM sound board BIOS ROM (16 KB). The core tries board-specific variants first (sound26.rom, sound86.rom, sound118.rom, soundSPB.rom, sound14.rom) then falls back to sound.rom.

`2608_bd.wav` -optional

- Path: `np2/2608_bd.wav`
- Source: `sound/rhythmc.c:11,60-71`
- Platforms: lakka, recalbox, retroarch, retropie
- YM2608 OPNA rhythm sample: bass drum

`2608_sd.wav` -optional

- Path: `np2/2608_sd.wav`
- Source: `sound/rhythmc.c:12`
- Platforms: lakka, recalbox, retroarch, retropie
- YM2608 OPNA rhythm sample: snare drum

`2608_top.wav` -optional

- Path: `np2/2608_top.wav`
- Source: `sound/rhythmc.c:13`
- Platforms: lakka, recalbox, retroarch, retropie
- YM2608 OPNA rhythm sample: top cymbal

`2608_hh.wav` -optional

- Path: `np2/2608_hh.wav`
- Source: `sound/rhythmc.c:14`
- Platforms: lakka, recalbox, retroarch, retropie
- YM2608 OPNA rhythm sample: hi-hat

`2608_tom.wav` -optional

- Path: `np2/2608_tom.wav`
- Source: `sound/rhythmc.c:15`
- Platforms: lakka, recalbox, retroarch, retropie
- YM2608 OPNA rhythm sample: tom

`2608_rim.wav` -optional

- Path: `np2/2608_rim.wav`
- Source: `sound/rhythmc.c:16`
- Platforms: lakka, recalbox, retroarch, retropie
- YM2608 OPNA rhythm sample: rim shot

`scsi.rom` -optional, HLE available, missing from repo

- Path: `np2/scsi.rom`
- Source: `cbus/scsiio.c:208-233`
- SCSI controller BIOS ROM (16 KB). The core includes a built-in SCSI BIOS stub as fallback.

`sasi.rom` -optional, HLE available, missing from repo

- Path: `np2/sasi.rom`
- Source: `cbus/sasiio.c:442-465`
- SASI controller BIOS ROM (4 KB). The core includes a built-in SASI BIOS stub as fallback.

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