(Trimming the message history ...) So here is my current state:
* The "twist" connector that swapped the bottom row of pins with the top row of pins was wrong for me, as it was in the other thread. The male pins should have been straight through - top-to-top and bottom-to-bottom. I figured this out last night and rewired the twist connector to correct it, as the other person had done. I've buzzed the twist connector and everything is there. The IDE cable is new and it is secure on the DVI. * My Model 100 adapter (unused so far) seems to also be incorrectly assembled. I have an email to Gregory about that. (This is in addition to the incorrect twist adapter.) * The worst thing that might have happened is the top row was swapped with the bottom row. Which for the most part is safe, as you (Brian) note. There are one or two pins I'm worried about that I need to do more research on. Both M102s have the same general problem now. I power them on first. I power on the DVI. The DVI boots, loads from the floppy, and displays the copyright message. I wait a few seconds, then use the reset button on the M102. The DVI responds and starts to run the disk drive, presumably trying to transfer disk BASIC to the M102. This never completes. No amount of power off-on, reset, or cold start helps it. The DVI will run the disk light a second or two, pause a second or two, and then try again. If I press the BREAK button early (maybe Shift Break?) I can get control again from the keyboard but disk BASIC is not loaded. If I let the cycle repeat too many times the machine needs a cold restart. At this point I have one or more problems: * The M102s have some damage because I did the same thing to both of them. I can't tell. Maybe it's time to get the o-scope out and look at the potentially damaged signal pins to see what they are doing. * The cable is still wrong, but I think I have it correct this time after examining everything for myself. * The DVI might have a fault. Unlikely given its condition and behavior so far. * The disk I wrote might be crap. I used Teledisk v2.16 on a 386 PC with a real floppy controller. It's good enough to load the initial sectors, but I can't verify the rest of the disk. I might be loading bad data into the DVI buffers and passing it onto the M102, and that could be causing the crash. But there is no easy way to prove or disprove that. * The M102s have other faults that are unrelated to all of this. (They have never had their capacitors replaced.) At this point I'd like to find a working DVI setup in the region so I can put my M102s on it to see if they are working correctly - I really want to ensure they weren't damaged with the incorrect cabling. If they are good then I'm no worse off than I was a few days ago when I started this project. -Mike
