Pegatron H81-M4 Rev 1.02

BIOS .rar 1.97 MB Shared

Firmware archive for the Pegatron H81-M4 desktop motherboard, board revision 1.02, an Intel H81 chipset board often found in OEM desktops. The RAR is 1.97 MB, so check the extracted image against the capacity of the SPI chip on the board, since a mismatched size will not program correctly. Typical use is reflashing a corrupted BIOS with an external programmer when the PC powers on with no display. Back up the original chip, including its serial and MAC data, before writing.

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.

7-ZipWinRARThe Unarchiver (macOS)

More about .rar files

Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →