If any of my #hardwarehacking #hardwarehacker #retrocomputing followers know the answer to this question about troubleshooting physical connectors of a #piscsi / #rascsi device, I'd really appreciate it.
I built one of these about a month ago, and I tested it yesterday on a retro Mac - the drive wasn't detected on the SCSI bus.
I checked the troubleshooting instructions in the #PiSCSI Github Troubleshooting page (https://github.com/PiSCSI/piscsi/wiki/Troubleshooting) and built out a set of jumpers in the DB25 connector, and ran the python test script. The result wasn't good.
I'm now in the process of getting a real DB25 breakout board with a plug so I can rule out my janky jumper wires as a culprit in the test going south. But my question is: If these six pairs of pins (shown in red boxes) are truly not signalling properly...wat do?
I'm not sure where the fault lies - is it a failure of the chips soldered onto the board? There was a lot of surface-mount that ain't perfect but seems to work. Is there some other component that has failed? It's hard to know how to approach the problem at this scale.
Any ideas?