A1708 820-00840-A U2890

BIOS.bin
370 KB · first posted in BIOS Archive
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What the file name tells us

BrandApple
ModelApple A1708
Board820-00840
RevisionA
KindBIOS
Format.zip, .bin
Archive size370 KB
First posted2022-11-26
ChannelBIOS 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

FormatWhat it isOpen with
.zipZIP archive7-Zip, WinRAR or the built-in Windows extractor
.binraw SPI flash imagea CH341A, XGecu T48 / TL866II Plus or RT809H programmer

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