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RetroBIOS

QUASI88

QUASI88 emulates NEC PC-88 and NEC PC-8001. It reads 13 files, 2 of them required: without a required file it does not start games. A required file is needed only by the machines that use it. Each file below cites the line of source code that reads it.

About this profile
Detail Value
Type libretro
Classification Community fork
Source https://github.com/libretro/quasi88-libretro
Upstream https://www.retropc.net/showzoh/quasi88/
Version 0.6.4, stated in src/version.h
Revision libretro/quasi88-libretro@7884be527777
Profiled 2026-03-29
Profile YAML, JSON
Cores quasi88
Systems NEC PC-88, NEC PC-8001
Install this emulator's files

The installer finds your setup and its BIOS folder, then downloads only the files this emulator reads there and checks each one.

Open the Start menu. Type PowerShell and open it. Paste the line. Press Enter.

PowerShell
&([scriptblock]::Create((irm https://abdess.github.io/retrobios/i.ps1))) --emulator quasi88
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. N mode emulates PC-8001 series (N-BASIC) and requires n88n.rom.

Files

Section titled “Files”

13 files: 2 required, 11 optional. 5 have an HLE fallback.

In this collection: 13 in repo and 0 missing.

Required

Section titled “Required”
FileStatus

n88.rom

  • Path: quasi88/n88.rom
  • Aliases: N88.ROM
  • N88-BASIC main ROM (32 KB). Falls back to pseudo-BIOS if missing.
Source
in repo HLE fallback

n88_0.rom

  • Path: quasi88/n88_0.rom
  • Aliases: N88_0.ROM, N88EXT0.ROM, n88ext0.rom
  • N88-BASIC V2 extension ROM 0 (8 KB). Needed by most software.
Source
in repo

Optional

Section titled “Optional”
FileStatus

n88_1.rom

  • Path: quasi88/n88_1.rom
  • Aliases: N88_1.ROM, N88EXT1.ROM, n88ext1.rom
  • N88-BASIC V1H extension ROM 1 (8 KB). For V1 High-speed mode.
Source
in repo

n88_2.rom

  • Path: quasi88/n88_2.rom
  • Aliases: N88_2.ROM, N88EXT2.ROM, n88ext2.rom
  • N88-BASIC V1S extension ROM 2 (8 KB). For V1 Standard mode.
Source
in repo

n88_3.rom

  • Path: quasi88/n88_3.rom
  • Aliases: N88_3.ROM, N88EXT3.ROM, n88ext3.rom
  • N88-BASIC extension ROM 3 (8 KB). Older V2 extension.
Source
in repo

n88n.rom

  • Path: quasi88/n88n.rom
  • Aliases: N88N.ROM, N80.ROM, n80.rom
  • N-BASIC ROM (32 KB). For PC-8001 compatible N-BASIC mode.
Source
in repo

n88sub.rom

  • Path: quasi88/n88sub.rom
  • Aliases: N88SUB.ROM, DISK.ROM, disk.rom
  • Disk subsystem ROM (2 KB, 2D type). Falls back to pseudo-BIOS if missing.
Source
in repo HLE fallback

n88knj1.rom

  • Path: quasi88/n88knj1.rom
  • Aliases: N88KNJ1.ROM, KANJI1.ROM, kanji1.rom
  • Kanji ROM level 1 (128 KB). Required for Japanese text display.
Source
in repo

n88knj2.rom

  • Path: quasi88/n88knj2.rom
  • Aliases: N88KNJ2.ROM, KANJI2.ROM, kanji2.rom
  • Kanji ROM level 2 (128 KB). Extended kanji character set.
Source
in repo

n88jisho.rom

  • Path: quasi88/n88jisho.rom
  • Aliases: N88JISHO.ROM, JISYO.ROM, jisyo.rom
  • Dictionary ROM (512 KB). Japanese dictionary lookup.
Source
in repo

font.rom

  • Path: quasi88/font.rom
  • Aliases: FONT.ROM
  • ANK font ROM (2 KB). Falls back to built-in font or kanji ROM glyphs.
Source
in repo HLE fallback

font2.rom

  • Path: quasi88/font2.rom
  • Aliases: FONT2.ROM
  • Second font ROM (up to 4 KB). Falls back to built-in ANH font.
Source
in repo HLE fallback

font3.rom

  • Path: quasi88/font3.rom
  • Aliases: FONT3.ROM
  • Third font ROM (up to 4 KB). Zeroed out if missing.
Source
in repo HLE fallback

Next steps

Section titled “Next steps”
.

Maintained by Abdess on GitHub. Report a problem.

Packs from release v2026.10.10, .

MIT for the tooling and metadata. BIOS and firmware files are third-party system software, preserved for personal backup, archival and interoperability.