Batch Upgrading ZX81s
Now that I am getting to the end of my ZX81 kit inventory it is time to organize what remains. This includes some new and some used assembled ZX81s including
- some boxes of ZX81s from the Sinclair Repair Center
- some assembled ZX81s new in original retail boxes.
Regarding the ZX81s I have from the Sinclair repair center, I think the best thing to do with them is upgrade them with video adaptors and possibly with internal 16K RAM and possibly a switching regulator.