ZX Spectrum build, No ULA.

In this short series, I'm going to build a ZX spectrum using an EPROM instead of a ULA. In this video, much of the build is done and some bring-up.
I'm planning to do a PAL version as well.

Part 1: This video
Part 2: https://youtu.be/qO1dNRKHeb4
Part 3: https://youtu.be/If8GkpuakHM
Part 4: https://youtu.be/jdkaOuP_c5I
Part 5: https://youtu.be/N36iWYcXBAE

16K ZX81 vs 16K ZX Spectrum
https://www.youtube.com/watch?v=mL0K5u1zkko

VGA from an EPROM.
https://www.youtube.com/watch?v=seyHAFpsoP8

Apple 2 wire-by-wire
https://www.youtube.com/playlist?list=PLjQDRjQfW-85BWo4IC3WYUDZ-hC8qJsqO