A1502 (820-3476-A)

BIOS
8.5 MB · first posted in Laptop & Desktop BIOS Files
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What the file name tells us

BrandApple
ModelApple A1502
Board820-3476
RevisionA
KindBIOS
Format.zip
Archive size8.5 MB
First posted2024-07-20
ChannelLaptop & Desktop BIOS Files

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
.binBIOS image inside the archive (usually .bin)a CH341A, XGecu T48 / TL866II Plus or RT809H programmer

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