ROM image labelled D1800M, version 1.90, in a 4.34 MB RAR; the manufacturer is not stated. The naming style with a version in brackets resembles ASRock desktop BIOS releases, but confirm the board model printed on the PCB matches. The file is intended for reprogramming the BIOS chip with a programmer when the board fails to boot. Back up the original chip first and compare the extracted image size with the flash capacity, since a mismatched size will not fit.
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 →