I have just finished building this.
Unfortunately it has a problem with the keyboard output. Basiacally, when I push a 'Q' a 'I' will appear on the screen.
As far as I can tell there is a problem with the 5th and 6th bit in the 8 bit sequence that the keyboard sends. They get scrambled somehow.
I'm racking my brain as to what it could be. I've checked all the soldering and it looks good. Checked the keyboard adaptor I built, no shorts or misconnected wires.
Anyway, enjoy the photo. Hopefully I can get it working soon.