Dell Inspiron 5520 BIOS dump from a Core i7 configuration, second copy, 4.50 MB .rom file. The odd size likely means the dump combines two SPI chips or carries extra data. Check it against the chips on your board before programming, because an image that does not match the flash capacity will not fit. No board number or BIOS revision is given. Open it in a hex editor to check its contents, and always back up the original chip contents, including service tag areas, before writing.
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 →