What's funny is you could visually see how the trace was rotted out (it was actually broken right at the SCC). Had I been more careful in my searching, I probably could have found the bad pin with my naked eye, but methodically checking everything with my multimeter and the schematics is a good thing to do anyway
Not every broken trace is visible
P.S. Right now I am using HyperTerm on my PC, and ZTerm on my mac to ZModem a large stuffit archive of System 7.1.1. Rather than consume the disks, I figured I could simply serial it over
P.P.S. If you are using a newer version of windows, and want a good way to ZModem stuff, HyperTerm no longer comes with windows, BUT if you still have your old Windows XP CD (or Windows 2000, or an ISO
), you can copy HyperTerm off of that. Works fine for me on Windows 10 x86-64, with a FTDI USB to serial adaptor.