BIOS dump for the M10B1 motherboard, Wistron board 09905-1, with a 48.4GU01.011 PCB part number that indicates board revision. Wistron uses five digits and a revision suffix, plus 48.4xxxx codes for the bare board. The name gives no laptop brand. The 1.76 MB RAR should unpack to an image sized for the flash chip. Confirm 09905-1 and 48.4GU01 on the PCB, read and save the original chip with a programmer, then write and verify.
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 .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →