Boschloo Posted December 22, 2023 Share Posted December 22, 2023 I find this rather strange. I ran the Diagnostics Cart and got this from three different Commodore 128 machines. Bad U1. This can't be right. It also says the Control Port is bad but I'm guessing I just have a bad harness. Any insights? Quote Link to comment Share on other sites More sharing options...
Boschloo Posted December 23, 2023 Author Share Posted December 23, 2023 Okay, apparently the issue has to do with the control port harness expecting the keyboard harness to be plugged in. It can't be, because a C64 keyboard harness cannot plug into a C128. So the U1 "Bad" is a false positive. Interesting. Quote Link to comment Share on other sites More sharing options...
nick3092 Posted December 23, 2023 Share Posted December 23, 2023 There are special c128 keyboard harnesses if you really want to test to 100%. Quote Link to comment Share on other sites More sharing options...
Boschloo Posted December 23, 2023 Author Share Posted December 23, 2023 17 minutes ago, nick3092 said: There are special c128 keyboard harnesses if you really want to test to 100%. That's right, I put an order in for one. Should be here in 2 weeks! Quote Link to comment Share on other sites More sharing options...
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