I'm trying to restore my original Apple I which I bought from Steve Jobs at the Homebrew Computer Club. I have a friend who is an expert engineer working on it. I have not run the board for 40 years but he has made good progress and got the board running. (see attached).
Here are my questions:
When I pulled the first RAM chip, the leads were very tarnished, probably silver plated. When I attempted to install the IC, several of the leads on one side were very weakly attached to the body, to the point insertion would surly break a lead. All of the remaining 7 DRAM parts look to be in similar condition and I would recommend changing all 8 of them. There is solder evidence on some of the DRAM socket pins that that they may have had trouble with poor connections in the past (see attached). He recommends finding the original Mostek MK4096N-11 RAM ICs if possible.
1. Does anyone know where to find these Mostek RAM chips?
2. If they don't exist can you recommend an equivalent chip?
3. He also recommends we add another 4K of memory. Is that a good idea?
4. Can someone remind me of if BASIC comes installed on the Apple I?
5. I recall the high res routines were available on Cassette tape. Was there other software?
6. I'm thinking about auctioning the board and wondered if anyone knows how important the Cassette board is in an auction? I have one but getting it working will take some effort.
Thanks for any insights you can provide.