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# QUASI88 - RetroBIOS

Type | libretro
Classification | community_fork
Source | https://github.com/libretro/quasi88-libretro
Upstream | https://www.retropc.net/showzoh/quasi88/
Version | 0.6.4
Profiled | 2026-03-25
Cores | quasi88
Systems | pc-8801

Technical notes

Files go in <system_dir>/quasi88/ or directly in <system_dir>/. The pseudo-BIOS covers N88-BASIC V2 and the disk subsystem at a basic level. For full compatibility (N-BASIC, V1H/V1S modes, dictionary lookup, kanji display), real ROM files are needed.

Core option "quasi88_basic_mode" selects N88 V2, N88 V1H, N88 V1S, or N mode. Each mode requires its corresponding ROM.

13 files | 2 required, 11 optional | 11 in repo, 2 missing | 5 with HLE fallback

`n88.rom` -required, HLE available

- Path: `quasi88/n88.rom`
- Size: 32.0 KB
- Aliases: `N88.ROM`
- Source: `src/LIBRETRO/libretro.c:550-551`
- Platforms: recalbox, retrodeck
- N88-BASIC main ROM (32 KB). Falls back to pseudo-BIOS if missing.

`n88_0.rom` -required

- Path: `quasi88/n88_0.rom`
- Size: 8.0 KB
- Aliases: `N88_0.ROM`, `N88EXT0.ROM`, `n88ext0.rom`
- Source: `src/LIBRETRO/libretro.c:555`
- Platforms: lakka, recalbox, retroarch, retrodeck, retropie
- N88-BASIC V2 extension ROM 0 (8 KB). Needed by most software.

`n88_1.rom` -optional

- Path: `quasi88/n88_1.rom`
- Size: 8.0 KB
- Aliases: `N88_1.ROM`, `N88EXT1.ROM`, `n88ext1.rom`
- Source: `src/LIBRETRO/libretro.c:556`
- Platforms: lakka, recalbox, retroarch, retrodeck, retropie
- N88-BASIC V1H extension ROM 1 (8 KB). For V1 High-speed mode.

`n88_2.rom` -optional

- Path: `quasi88/n88_2.rom`
- Size: 8.0 KB
- Aliases: `N88_2.ROM`, `N88EXT2.ROM`, `n88ext2.rom`
- Source: `src/LIBRETRO/libretro.c:557`
- Platforms: lakka, recalbox, retroarch, retrodeck, retropie
- N88-BASIC V1S extension ROM 2 (8 KB). For V1 Standard mode.

`n88_3.rom` -optional

- Path: `quasi88/n88_3.rom`
- Size: 8.0 KB
- Aliases: `N88_3.ROM`, `N88EXT3.ROM`, `n88ext3.rom`
- Source: `src/LIBRETRO/libretro.c:558`
- Platforms: lakka, recalbox, retroarch, retrodeck, retropie
- N88-BASIC extension ROM 3 (8 KB). Older V2 extension.

`n88n.rom` -optional

- Path: `quasi88/n88n.rom`
- Size: 32.0 KB
- Aliases: `N88N.ROM`, `N80.ROM`, `n80.rom`
- Source: `src/LIBRETRO/libretro.c:559`
- Platforms: recalbox, retrodeck
- N-BASIC ROM (32 KB). For PC-8001 compatible N-BASIC mode.

`disk.rom` -optional, HLE available

- Path: `quasi88/disk.rom`
- Size: 2.0 KB
- Aliases: `DISK.ROM`, `N88SUB.ROM`, `n88sub.rom`
- Source: `src/LIBRETRO/libretro.c:552-553`
- Platforms: recalbox, retrodeck
- Disk subsystem ROM (2 KB, 2D type). Falls back to pseudo-BIOS if missing.

`n88knj1.rom` -optional

- Path: `quasi88/n88knj1.rom`
- Size: 128.0 KB
- Aliases: `N88KNJ1.ROM`, `KANJI1.ROM`, `kanji1.rom`
- Source: `src/LIBRETRO/libretro.c:560`
- Platforms: recalbox, retrodeck
- Kanji ROM level 1 (128 KB). Required for Japanese text display.

`n88knj2.rom` -optional

- Path: `quasi88/n88knj2.rom`
- Size: 128.0 KB
- Aliases: `N88KNJ2.ROM`, `KANJI2.ROM`, `kanji2.rom`
- Source: `src/LIBRETRO/libretro.c:561`
- Kanji ROM level 2 (128 KB). Extended kanji character set.

`n88jisho.rom` -optional

- Path: `quasi88/n88jisho.rom`
- Size: 512.0 KB
- Aliases: `N88JISHO.ROM`, `JISYO.ROM`, `jisyo.rom`
- Source: `src/LIBRETRO/libretro.c:562`
- Dictionary ROM (512 KB). Japanese dictionary lookup.

`font.rom` -optional, HLE available

- Path: `quasi88/font.rom`
- Size: 2.0 KB
- Aliases: `FONT.ROM`
- Source: `src/LIBRETRO/libretro.c:566`
- Platforms: lakka, recalbox, retroarch, retropie
- ANK font ROM (2 KB). Falls back to built-in font or kanji ROM glyphs.

`font2.rom` -optional, HLE available, missing from repo

- Path: `quasi88/font2.rom`
- Size: 4.0 KB
- Aliases: `FONT2.ROM`
- Source: `src/LIBRETRO/libretro.c:576`
- Second font ROM (up to 4 KB). Falls back to built-in ANH font.

`font3.rom` -optional, HLE available, missing from repo

- Path: `quasi88/font3.rom`
- Size: 4.0 KB
- Aliases: `FONT3.ROM`
- Source: `src/LIBRETRO/libretro.c:588`
- Third font ROM (up to 4 KB). Zeroed out if missing.

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