Navigate/Search

Smoke Test …

Well…. the smoke test failed …. I could smell burning somethng ….. turns out I made a  very big mistake … when looking at the memory expansion connector in the IIc memory technical reference and the IIc technical reference, I thought the pinout was as if you were looking down on the the connector in the machine … what they are actually showing is the memory connector on the card facing up … needless to say I had every thing ass backwards … rather then go an rip every thing apart I have used some lead cables and a IDC 34 connector to fix things up for now …

So once I got the system booting again, I was able to successfully program the XC95108 with the jed file I programmed. Next I tried executing the diag code for the memory card @ c40a … it failed with an address error … so thats where I will start my investigations .. I will put the logic analyzer on the Apple side to start to make sure the CPLD is getting all the signals properly … then once I have determined that I will put the probes on the sram side to make sure the ram is reacting properly.

Leave a Reply