Grundy

Every BIOS file for Grundy machines, one card per file.

How to read a card

A card gives the file's fingerprints, the emulators that read it, the setups that list it and where to download it. A file can have several versions, one per region or revision: the main one comes first, the others under "Variants". To install the files of one console, open its "Install" box.

On the setup's list names the setups whose own BIOS list has the file, by the name each gives it. Packed for its emulators by names the setups whose pack adds it because one of their emulators reads it.

MAME and FBNeo sets must match the emulator's version. Which version each core reads.

NewBrain

No file needed with MAME. Optional: nb_mdc48.zip.

Install the files of NewBrain

Each platform names the system its own way.

Linux, macOS, Steam Deck:

Terminal

# RetroDECK
curl -fsSL https://abdess.github.io/retrobios/i | sh -s -- --platform retrodeck --system arcade

Windows (PowerShell):

PowerShell

# RetroDECK
&([scriptblock]::Create((irm https://abdess.github.io/retrobios/i.ps1))) --platform retrodeck --system arcade

nb_48gc.zip 6.4 KB Download

SHA1

80d34a21c6bc

On the setup's list

bios/nb_mdc48.zip: RetroDECK

Packed for its emulators by

nb_mdc48.zip: Batocera, EmuDeck, KNULLI, Lakka, RetroArch, RetroBat, RetroPie, ROCKNIX
bios/nb_mdc48.zip: AmberELEC, EmuELEC

Emulators

MAME

Hashes and collection path

SHA1

80d34a21c6bc9732f93c754d4b71cb7b22e87a99

MD5

36d690ffadc08a31141ffcd573320518

CRC32

67190bd1

SHA256

42c05b9132fe80bdcee58a7ba9528197d6e2d47e507dc6f3e57579adc102e3ff

Collection path

bios/Grundy/NewBrain/nb_48gc.zip

nb_image.zip 1.8 KB No reader Download

SHA1

bf4aed0b09ba

Hashes, romset and collection path

SHA1

bf4aed0b09bae6dfe2153a6f3bd91e9146705073

MD5

5b69f69a5ec56588b92bdc138a3cc3af

CRC32

833109d1

SHA256

2556d6e9f86d84505de1526b19970f8e8ce3b116bf78c4f638546b9d364fe9bd

Romset

Same contents as MAME 0.190 to 0.289

Collection path

bios/Grundy/NewBrain/nb_image.zip

Next steps

• Get your files, for the setup you play on
• When a game does not start
• Every emulator, and the files each one reads
• Every hash of these files, as JSON

Data as of 4 November 2026.