Firmware for the ES10ISX board in the EDUNEC branded version, apparently from an education-oriented machine using this shared platform. The archive is a 1.18 MB RAR containing an image for the small SPI flash. It is used to revive units with corrupted BIOS or to return a board to its original EDUNEC identity after a different brand image was written. Program it externally, but first save the current chip contents, check the ES10ISX marking on the PCB, and confirm that the binary length matches the chip size.
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 →