I have a couple of issues with an Apple II+ that I got recently. As I don't have any good documentation on it and I found this forum I thought I'd give it shot here.
When running Apple II Confidence program I only see/can test the 1st 32K of memory (the last 16K between 32 and 48K isn't visible). The 1st 32K checks out without any issues through several passes so clearly something with the last 16K. If it was RAM chip(s) that was the issue I would have assumed that I would have seen the full 48K and that the RAM test would have nailed it down to the correct RAM chip(s).
Also, if I connect the language card the machine freezes upon power-on with garbled characters on screen.
Which chip controls the last bank of 16K?
Which row of RAMs is which part (16K, 32K and 48K)?
Any other suggestions?