BIOS archive for the MSI PRO 20EX 8GL all-in-one, whose mainboard is listed as MS-AAC21, packed as a 4.76 MB RAR. The name carries no version number or flash chip details, so look inside to see whether it holds a raw SPI dump or an update file. A raw dump lets a technician reprogram the BIOS chip with a programmer when the system no longer starts. Match the MS-AAC21 code on the board, keep a copy of the original chip, and make sure the image size equals the chip 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 (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 13 Nov 2023 | Open file on RM Schematics |
| @generalbios | 16 Dec 2023 | Open file on RM Schematics |
| @generalbios | 4 Nov 2024 | 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 →