Firmware package for the ZX-H55M board, BIOS version 1.01, marked as working and fully tested. The RAR archive is around 1.65 MB and should contain the image to be written to the board's SPI flash chip. It is useful for reviving a board that will not post because of a corrupted BIOS, using an external programmer and a clip or by desoldering the chip. Read and save the existing contents first, check that the dump size matches the chip capacity, and verify the hardware revision against the firmware version.
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 .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →