A BIOS / firmware dump for Lenovo hardware (board 17870-1). Shared as “LENOVO_THINLPAD_P1_LPM_1_MB_17870_1_448_0DY05_0011_i7_8850H_32MB.rar” — a .rar file, 9.55 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 →