1MHz, 2 Boards, 4 Bits and a Homebrew CPU
[Agp.cooper] saw a vintage 4Kx4 bit RAM chip and decided that it needed a CPU design to match. The TTL design fits on two boards and has a functional front panel.
This custom CPU project has a few interesting bits worth noting. First, it is small enough that you can wrap your head around it pretty easily. And [Agp.cooper] gives a good account of the instructions set architecture choices he considered and why he settled on the final design.
Another interesting twist is the testing. Each of the boards can mate with an Arduino which will exercise and test its …read more
