BIOS image archive for the AN52S motherboard, a 376 KB zip. The name states the model and nothing more, so look inside for the firmware file and any version notes. Related AN52, AN52V and AN52D packages exist, and using the wrong one can leave a board unbootable. A technician applies this firmware to revive a board with damaged BIOS, writing via programmer if the system no longer posts. Back up the existing chip and check the image matches its capacity before writing.
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 →