Right, I think they were more just like "VGA cards" or "graphics adapters" for a while, and before that would have been CGA/EGA/Hercules, etc. I view the first GPUs as being those with 2D + 3D acceleration.
1) The CD4000 series is about the slowest logic family that's still on the market. Switching to anything else - 74LS, 74HC, take your pick - will improve your fMax dramatically.
2) Every IC on your board needs a decoupling capacitor as close to its power/ground pins as possible. Not having those is probably causing a lot of weird behavior, including the "interference" you're seeing from other devices.
The number of issues you'll face that you'll NEVER be able to explain without them is ... not small...
https://www.bbspot.com/News/2003/02/ati_ascii.html
50x18 chars... well, I've seen a patched Nethack for the Zipit Z2 (altough you can perfectly set a micro-font being able to fit a whole standard 80x24/25 char screen).
privatelypublic•4mo ago
accrual•4mo ago