Firmware dump for the ASUS S400CA, board revision 3.1, in a 3.71 MB RAR archive. The name includes u2801, which is probably the reference designator of the flash chip on the board, helping locate it on the PCB. The image is meant to be programmed directly into that SPI chip using an external programmer. Read out and store the original contents before erasing, make sure the rev 3.1 marking on the mainboard matches, and check that the file size equals the flash capacity.
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.
All sources (5)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 13 Mar 2021 | Open file on RM Schematics |
| @bartonarquivos | 25 Mar 2025 | Open file on RM Schematics |
| @bartonarquivos | 27 Oct 2025 | Open file on RM Schematics |
| @bartonarquivos | 26 Nov 2025 | Open file on RM Schematics |
| @bartonarquivos | 24 Mar 2026 | Open file on RM Schematics |
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 →