BIOS firmware for the Dell Studio 1558 on Quanta FM9C board, number DAFM9CMB8C0, with a Vietnamese note in the name crediting a technician named Hung. Quanta uses the DA project code pattern for many Dell laptops. The 1.86 MB ZIP is meant for rewriting the SPI flash with an external programmer when the machine is dead or stuck after a failed update. Check the board number on the PCB, keep a backup of the original chip, and confirm the image size fits the flash before writing it.
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 →