Just a quick update ... I'm not master with an oscilloscope but I checked the bus pins on the two M102s and they look somewhat reasonable. I'm going get a proper logic analyzer or a digital scope so that I can compare the published timing diagrams for the 8085 more easily; my older 20Mhz scope shows me that things are good enough, but it's difficult to be precise.
I'm still waiting to hear back from Gregory on the Tandy 100 part of the cable, which I think is also assembled wrong. Next up will be to get some header pins and make a better cable, as I don't like the jumper pin approach - it seems fragile and I've broken one pin already. Although I've buzzed them out I'm not confident in the connections so I'd rather build something more like what Brian has done. After that, it will be back to the DVI and the diskette to try to figure out what's preventing the 102s from loading disk BASIC. -Mike
