20Mhz ZX81 clone...

[Andy Rea]

it was a one off. in a need for speed 1 person race, it's still here and is my goto zx81.

@commie, yes it automatically switches clock speeds when its required to do the "live" picture generation, but then switches back to full speed during the top and bottom margins, of course load and save also force an automatic switch to normal speed. also.

regards Andy