Well, he seemed pretty clear that the "GPU" (which is the micro with the external RAM) could handle the video just fine by itself, but that the problems began when linking the two micros up over USB. Are you thinking that it's a combination of the two, and that dropping either of them would have helped?

I've left him a question in the comments over there; I'll pop in again in a bit and see if he's replied.

the SPI protocol has "built in" to it the insertion of additional "0" bits in between data bytes

Click to expand...

Ah. Well, that's annoying. Thanks for the link; again, something I will follow up on.

Incidentally, I've gotten interested in building something myself, probably based around the eZ80 AcclaimPlus! micro. (ugh, awful name)