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RetroBIOS

GAM4980

GAM4980 emulates BBK Longman A4980. It reads 2 files, 2 of them required: without a required file it does not start games.

About this profile
Detail Value
Type libretro
Classification Pure libretro
Source https://github.com/ThisBoringWorld/gam4980
Upstream https://codeberg.org/iyzsong/gam4980
Version 0.2, stated in src/libretro.c
Revision ThisBoringWorld/gam4980@eeaa531b55e7, iyzsong/gam4980@32c531d3e715
Profiled 2026-03-23
Profile YAML, JSON
Cores gam4980
Systems BBK Longman A4980
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 gam4980
Platform details

  • bios_mapping:

    • target: 0x800000-0x9FFFFF (font), 0xE00000-0xFFFFFF (OS) in banked address space
    • source_ref: src/libretro.c:109-110, src/libretro.c:302-305
    • note: sys.rom_8 and sys.rom_e are flat 2 MB arrays. The CPU accesses them through bank-switched memory (PA() macro resolves virtual to physical address). rom_8_vread and rom_e_vread handle indirect reads via the banking system.

  • load_path:

    • source_ref: src/libretro.c:1193-1197
    • note: retro_init() builds the path as {system_directory}/gam4980/ and passes it to sys_init(). Files must be named exactly 8.BIN and E.BIN (case sensitive on Linux). No .info firmware declarations exist, so RetroArch won't warn about missing files at scan time.
Technical notes

Place 8.BIN and E.BIN in the RetroArch system/gam4980/ subdirectory. Both files must be 2 MB dumps from a BBK Longman 4980 dictionary: 8.BIN - font ROM, dumped from address range 0x800000-0x9FFFFF E.BIN - OS ROM, dumped from address range 0xE00000-0xFFFFFF Game files use the .gam extension.

Files

Section titled “Files”

2 files: 2 required, 0 optional.

In this collection: 2 in repo and 0 missing.

Required

Section titled “Required”

gam4980/8.BIN required in repo

Source

gam4980/E.BIN required in repo

Source

Next steps

Section titled “Next steps”
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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.