Another PCB from PCBway. mostly because the one button make your PCB happen Kicad add on is go good for lazy people. There is not a lot on it as you can see - just address decoders. The adapter goes onto the connector facing back towards the board so the USB is in the PCB sandwich. That as I hoped means it fits a single slot on the more generously spaced backplanes.

The hardware turns out to be easy, the software not so. The documentation isn't very clear and the chip behaviour also turns out to have a few undocumented "and then wait a bit" cases if you want the right results.

It is now working with an initial Fuzix driver running on my 8085 system.