BIOS for an E11IS2 board in the version branded for Positivo BGH, distributed as a 574 KB RAR archive. It is a branded variant of the same firmware also found in unbranded and other OEM forms, so pick the one matching the machine for correct logo and identity. Write it to the flash chip using a hardware programmer after confirming E11IS2 on the board. Always read and save the original chip contents first, and make sure the image size matches the chip 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 →