BIOS set for the Dell OptiPlex 990 desktop, PWB revision A00, containing images for both 2 MB and 8 MB flash chips in a 4.84 MB RAR. OptiPlex boards of this era often split firmware across two SPI chips, so each image must go to the chip of matching capacity. Technicians use these dumps to recover boards that will not post or show ME errors. Check the PWB revision on the board, read and save both original chips first, and never swap the 2 MB and 8 MB images.
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 @afsbiosfree. 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 →