APPLE A1286 MLB 820-2850-A 4MB BIOS
BIOS4 MB
4.6 MB · first posted in BIOS Archive
Get on TelegramWhat the file name tells us
| Brand | Apple |
|---|---|
| Model | Apple A1286 |
| Board | 820-2850 |
| Revision | A |
| Kind | BIOS |
| Format | .rar |
| Chip size | 4 MB |
| Archive size | 4.6 MB |
| First posted | 2025-06-28 |
| 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 |
|---|---|---|
| .rar | RAR archive | 7-Zip or WinRAR |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Other files for 820-2850
FileSizeRevAddedSource
A1286 K18 (820-2850-A) PDF
Schematic.pdf
4.1 MB
A
Get on Telegram Schematics & Boardviews Archive +1 more
MBP 820-2850 BDV & PDF
SchematicBoardview.bdv.pdf
3.9 MB
—
Get on Telegram Schematics & Boardviews Archive +1 more