Firmware for the HP Compaq Pro 6305 desktop, with the name citing the King Cobras board at revision B, in a 3.50 MB RAR. King Cobras appears to be the internal board code, so match it and the revision against the system board label. A technician would program this image into the BIOS flash when the machine shows no video or beeps after corruption. HP business desktops store serial and product data in the firmware, so read and keep the original chip contents before writing anything.
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 →