That PCB is a work of art! Excellent project.

Hi there. Glad to see progress being made with nxp duarts. I've a few 68681s that I'm going to drag out of the toy box one of these days. You said you couldn't get it to run at 8Mhz - did you mean the 6502 on 8mhz or have you a separate clock to the 2691? AN405 says clock should be 2 - 4 mhz. Just ...