BIOS for a P31A-G motherboard, compressed into a 387 KB RAR archive. Like similar P31A boards it is probably based on the Intel P31 chipset, but the name gives no vendor or revision. Look inside for the image file and any notes. Write it with an SPI or LPC programmer, or a DOS flasher, when repairing a corrupt BIOS. Ensure the board silk-screen reads P31A-G rather than another suffix, and keep the original dump in case the new image fails.
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 @afsbiosfree. 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 →