820-2110
820-2110 is an Apple main board number. 2 files are indexed for this board: 1 BIOS file, 1 schematic and 1 boardview.
File names mention revision A. BIOS images are 2 MB. First posted in June 2021 in Schematics & Boardviews Archive, Cyberlan Electronics and BIOS Archive.
BIOS dumps 1
Schematics 1
Board facts
| Board number | 820-2110 |
|---|---|
| Numbering | Apple board number |
| Revisions | A |
| BIOS chip size | 2 MB |
| First seen | 2021-06-15 |
| Source channels | Schematics & Boardviews Archive, Cyberlan Electronics, BIOS Archive |
| About the number | Apple logic boards are numbered 820-xxxx or 820-xxxxx; the trailing letter is the revision. |
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.
A schematic is the circuit diagram of the main board: power rails, power-up sequence, component values and net names. It is the reference for measuring voltages and tracing a fault.
A boardview is the component placement map of the PCB: click a part or a net and the viewer highlights where it is and what it connects to. Used together with the schematic to find test points.
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 |
Questions
Is there a boardview for 820-2110?
Yes, 1 boardview file.
What BIOS chip size does 820-2110 use?
The BIOS images for 820-2110 are 2 MB.
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.