Close

ALU works!

A project log for TTL 8-Bit CPU better than Z80

An 8th grader designing and building a real 8-bit CPU from scratch using custom architecture and discrete logic.

bohan-xuBohan Xu 03/15/2026 at 21:100 Comments

YES! The FPGA works! It didn't work because I used one of the MODE pins as a normal I/O and when I would boot it it would not boot my program. I also changed the switches to just wires because that way I wouldn't have to worry about pull-down resistors. 

Please comment or follow! Thanks!

Discussions