BIOS archive for a Positivo SIM machine with board MB40IA1, carrying the code 15bfc2_011000 which likely identifies the firmware build. The 1.25 MB RAR should be checked after extraction to confirm the image file and size. Technicians use these dumps to reprogram the SPI flash with a CH341A or similar programmer when a board fails to boot. Match the board marking on the PCB, back up the existing chip contents, and confirm the image fits the flash capacity.
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 →