Acer Aspire 5520G system BIOS stored as a 1 MB ROM image, sized for a 1 MB (8 Mbit) SPI flash chip. The G suffix marks the discrete-graphics version of the Aspire 5520, so this image should be used on that variant rather than the integrated model. Technicians use such files to recover a corrupted BIOS by writing the chip directly with an external programmer. Read and keep a backup of the existing chip contents first, and check that the chip capacity matches the 1 MB 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 .rom file
A BIOS image as shipped by the vendor (commonly AMI) — often the BIOS region only, without descriptor or ME.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →