NYKS 94V-0 NM19 131T 02A 820-2828-A 25L6406E

BIOS

3.5 MB · first posted 2022-03-12 in BIOS Archive

What the file name tells us

Brand	Apple
Board	820-2828
Revision	A
Kind	BIOS
Format	.zip
Flash chip	25L6406E
Archive size	3.5 MB
First posted	2022-03-12
Channel	BIOS Archive

Parsed automatically from the file name and caption. Always compare the board number with the one printed on your board.

What this kind of file is 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