820-2262 – Apple 1261
The Apple 1261 is built on the 820-2262 board. The catalog lists 2 files for it: 2 BIOS files.
Revisions seen in file names: A. First posted in August 2020 in BIOS Files and BIOS Archive.
BIOS dumps 2
FileSizeRevAddedSource
Board facts
| Board number | 820-2262 |
|---|---|
| Numbering | Apple board number |
| Revisions | A |
| First seen | 2020-08-29 |
| Source channels | BIOS Files, BIOS Archive |
| About the number | Apple logic boards are numbered 820-xxxx or 820-xxxxx; the trailing letter is the revision. |
Laptops that use 820-2262
- Apple 1261
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 |
|---|---|---|
| .7z | 7-Zip archive | 7-Zip or WinRAR |
| .rar | RAR archive | 7-Zip or WinRAR |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Which laptops use the 820-2262 board?
Files in the catalog link 820-2262 to the Apple 1261.
Where do the download links go?
Each button opens the original public Telegram post the file was shared in. ChambersDesignInc.com only indexes and cross-references those posts.