BIOS / firmware package for a ZX-G31LM motherboard, version 4.1, supplied as a 10.5 MB ZIP archive. The larger size compared with similar ZX releases suggests extra files may be bundled, such as flashing utilities or several images, though the name does not list the contents. Repair shops use these images to restore a dead or bricked board by programming the flash chip directly. Open the archive to identify the actual ROM file, verify it against the chip size and the board silkscreen, and read out the original firmware before overwriting it.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →