doctorj wrote:
Much larger images are already available at the following link and are representative of the boards I have:
http://amiga.resource.cx/photos/ioblix
In addition, my board is TP-only and hence lacks the big transformer in the middle.
There is not a lot of room for error in the design. The 68K interface works fine, and the registers and data spaces are I/O mapped. I suppose the data line MSB/LSB could have been reversed making it big-endian byte ordering, but that's not a big deal. There is only a single interrupt line, and that seems to be handled okay by the existing ioblix resource.
According to Michael Boehmer, the IOblix only pulses the INT line, instead of making static interrupts, which may cause troubles. I'm no hardware designer, nor a programmer, so I don't know exactly what the problem might be.
I remember a Usenet thread mentioning something about the ioblixether driver not always releasing interrupts, or something like that. You can google it.