A BIOS / firmware dump for Microsoft hardware. Shared as “BIOS_Microsoft_Surface_Laptop_3_13_5_inch_BIOS_1867_1868_M1098028.rar” — a .rar file, 4.36 MB.
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 @Laptopbiossolutions. 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.
7-ZipWinRARThe Unarchiver (macOS)
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →