Heroic failure!

I've slapped it all into shape and electrically things look solid - but no joy.

Result: Heroic failure!

I'll probably poke around a bit more before consigning this to the 'nearly works' pile as I get the same nonsense results with a known good chip. So you never know.

This might be the time to get my cheap-as-chips parallel-port logic analyzer built... It's easy to see how my project stack grows :)