Tested working BIOS for the ASUS S451 laptop, motherboard revision 2.0, intended for a 25Q64 flash chip, a 64 Mbit or 8 MB SPI part. Supplied as a 3.34 MB ZIP archive, so extract it and check the actual image size before programming. Technicians use dumps like this to recover boards that fail to POST after corrupted firmware. Match the revision on the PCB, read and keep the original chip contents with a programmer such as a CH341A, and verify after writing that the flash was programmed correctly.
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 →