BIOS firmware for the HP RP5810 retail point-of-sale system, board code name Apollo, revision A, delivered as an 8.9 MB RAR archive. It is intended for recovering a unit that fails to post after a corrupted update or a failed flash. Unpack the image and confirm its size matches the SPI flash chip on the board before programming it with a hardware programmer such as a CH341A. Always read and save the existing chip contents first so the original serial and configuration data can be restored if needed.
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 →