8-bit computer – output register & bus

After a busy few weeks, I finally got back to the 8-bit computer project. Since the last post, I’ve added the output register and the bus connections.

I used a CD4040BE for the counter instead of the 74LS76 as I didn’t have any of those on hand.

In the image above, I’ve added the bus connections. The output register is counting up with the program counter. The blue diodes in the top right module are showing the number 6 in binary which is mirrored on the output display.

Next step is to clean up some of the connections and get started on the control logic.