ARM Second

And the underneath.

And apart from sitting and looking at it, that's about all I've been able to do with the ARM Second Processor. I've tested it as much as I can, checking all the connections and changing the Tube ULA for a known good one. I've had the Brazil ROM out and read it into my EPROM programmer to check there's something there, I've powered it from a different supply and talked to it very nicely, but still all I get is a flashing cursor in the top-left of the Beeb whenever I connect it up and switch on.