BIOS image for a ZX desktop board, with H61 and B75 in the name pointing to Intel chipsets and v7.2 as the firmware version. The file has no extension but is 4.00 MB, matching a 32Mbit SPI flash. Boards of this type are often generic budget motherboards, so identify the exact model and chipset on your board before use. Write it with a programmer only after saving the original contents, and confirm the chip capacity is 4MB, since an image of the wrong size will not fit.
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.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →