Leoneq’s iNapGPU project attempted a crude TTL VGA card, producing unstable artifacts, glitches, and unusable output despite clever tricks.

source https://www.techradar.com/pro/this-hardware-fan-wanted-to-build-the-worlds-worst-graphics-card-with-128kb-rom-but-couldnt-manage-to-drop-to-a-vga-resolution