Thanks for that info Bob - I do not have an oscilloscope, not sure I know anyone out here that could check that. When you say to check the resistance from pin 2 on IC2 on KLM371 to ground, and then compare the resistance measurement from that signal to another data bus pin, what would I do if these are not identical? I think I see the steps that you recommended for me to test, but I am not sure if I understand what it is that I should do if the measurements are different.
I'll try to look at those tonight, plus the D0 for those two chips. I'll study the schematic some beforehand to see if I can pinpoint these, this isn't something I have a lot of familiarity with but I will do my best since I really want to get rolling with playing my polysix again. Thanks.