ASUS A55BM-K BIOS archive in ZIP format, about 4.5 MB, with 2002 most likely the BIOS version. The A55BM-K is an ASUS desktop board based on the AMD A55 chipset for socket FM1/FM2-class APUs, so check which APU generation the version supports. The image can be flashed through the ASUS update utility or written to the SPI chip with an external programmer when the board will not POST. Back up the original chip first and confirm the image matches the flash size.
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 →