NMI Generator PCB for ZX80?

[MaFli]

Hi everyone,

Now I've got my ZX80 clone running, I was thinking of making the NMI generator, based on the excellent work from Grant Searle. I have a second ZX80 PCB that I want to turn into a ZX81. Has anyone drawn a PCB for this?

@Pokemon, I also found your ZX80NMIX project. Is there a big difference between your version and Grant's? Can your board be used on a 'standard' ZX80 as well?

[PokeMon]

I am not sure - I think I have still boards of this. There could be a difference I have slightly in my mind.