BIOS archive for Compal board LA-E811P revision 2.0, labelled with the CSL50 and CSL52 project codes. No laptop brand is stated, so identify the machine by the PCB marking. A REV 1.0 version also exists, so read the revision on the board before choosing. Compal uses LA-xxxxP numbering for its designs. Use the dump to reprogram the SPI flash with an external programmer, back up the original chip, and check the image size against the chip.
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 →