Firmware dump for the ECS Z77H2-A3 motherboard, version 1.2 according to the name, which also marks it as tested and working. The 7z archive is about 3.36 MB. The Z77 in the model points to an Intel Z77 chipset board, where the BIOS sits on an SPI flash chip that can be rewritten with a CH341A-class programmer when the board will not boot. Back up the original chip before writing, check that the image size matches the flash capacity, and make sure the board version printed on the PCB matches 1.2.
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 @biosfiles. Enginerys does not host this file.
How to open a .7z file
High-ratio compressed archive, often used for large BIOS collections.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →