Commodore 64 display tests

In this video, I test some assumptions about the Commodore 64 user port to drive a simple demuxer and LEDs. I then create a quick prototype 4-bit wide simple memory bus protocol to map the user port 8 bits to 32 bits. This is then used to allow the Commodore 64 to runs some display tests using the hardware.

This is the last video in the series until I get the next batch of PCBs for the full user port interface and sprite board.

Special thanks to https://monstersgoboom.itch.io/ and Oziphantom for the encouragement and tech discussions during the engineering phase of this project.