BIOS image for a 945PLS3P desktop board, apparently a design based on the Intel 945PL chipset, though the name gives no manufacturer or version. The 320 KB RAR suits the small 4 Mbit flash chips used on boards of that era. Technicians use such images to reprogram an LPC or SPI flash that was corrupted by a failed update. Identify the exact chip type, read and save the current contents with your programmer, and make sure the image size matches the chip 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.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →