Variant of the PLACC / CSAC UMA revision 2_1 firmware, this copy carrying a PM suffix whose purpose the name leaves unexplained. It is 1.43 MB, the same size as the plain version, so compare both images before choosing. UMA indicates an integrated-graphics board build. Use it to reprogram the BIOS chip with a hardware programmer when the original is corrupted. First back up the existing chip, confirm the revision on the PCB, and check that the image length suits the flash part.
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 →