Posted By
nc513
on 2022-04-03
18:17:14
|  Re: Plus/4 310163 board with TED and CPU inserted the wrong way
Thanks. Yeah, I guess I might have to bring my dusty old scope out of storage.
I don't currently have access to any other Plus/4 boards, or even a C16. Might have to do something about that.
Just for the heck of it, I've desoldered all 8 DRAM chips as well as the multiplexers U9 and U10. They all tested good in my C64, so I installed IC sockets on the Plus/4 board and reinstalled those 10 chips. I've also removed the ACIA. The symptoms haven't changed one bit.
Brute force repair might not be the best strategy for this particular board ...
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