Hi there,

as we regularly discuss video solutions it seems, I think I'd post my video with a deep analysis of the Commodore PET video with discrete logic video circuits.

https://youtu.be/pwb5GvmoAFE

I think it's actually quite ingenious, reducing hardware reqs a lot my reusing counters and cleverly reducing logic terms when checking bounds.

Does anyone know if there is a similar analysis of the Apple ii video?

André

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Author of the GeckOS multitasking operating system, the usb65 stack, designer of the Micro-PET and many more 6502 content: http://6502.org/users/andre/

Perhaps something like

https://www.youtube.com/watch?v=r1VlrJb ... henEdwards

(You can skip to about 3:30 if you don't need a gentle introduction to basic CRT theory of operation).

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Got a kilobyte lying fallow in your 65xx's memory map? Sprinkle some VTL02C on it and see how it grows on you!

Mike B. (about me) (learning how to github)