Dual BIOS and EC firmware set for the Acer X4640G, with B15H4-AD given as the board or project code in the name. Having both BIOS images plus embedded controller firmware helps when a board uses separate flash chips or when EC corruption prevents power-on. The 6.76 MB archive is meant for reprogramming with an SPI programmer. Identify each chip on the PCB, read and save its original contents first, and check that every image size corresponds to the capacity of the chip it goes onto.
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 (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 13 Dec 2023 | Open file on RM Schematics |
| @generalbios | 17 Dec 2023 | 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 →