Thinking more and more about it in this thread (yes, I'm procrastinating doing something else), I'm beginning to come to the conclusion that the way with the le

Thinking more and more about it in this thread (yes, I'm procrastinating doing something else), I'm beginning to come to the conclusion that the way with the least modifications to the computer itself is to replace the DRAM with SRAM, and to "just" slow the video circuit down as well (including color burst, horizontal scan, etc.), but to attach a custom buffered display instead of a regular monitor to the computer. However, I wouldn't be surprised in the slightest if any other of the integrated circuits don't work at the slower speed for some reason. (Filters etc. you'd just replace/retune.)