820-2855 BIOS Dump 8MB
Part of 820-2855
820-2855: 2 BIOS files found in the source channels. The board is used in the Apple A1370. Image size: 8 MB. Flash chip noted in the file names: MX25L6406D. Board revisions: A.
BIOS files 2
FileSizeRevAddedSource
Laptops that use 820-2855
What these files are for
A BIOS dump is a full image of the board's SPI flash chip. It is written back with an SPI programmer when the original firmware is corrupted, after a chip replacement, or to recover from a failed update. Read and save the original chip first: serial number, DMI data and the Intel ME / AMD PSP state differ between boards.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| .zip | ZIP archive | 7-Zip, WinRAR or the built-in Windows extractor |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |