Redstone Cpu in Beta 1.3 (WIP)

I ran out of redstone dust so here's a little 4-bit cpu i have been making in my beta 1.3 minecraft world

Cpu:

Addition/substraction/*Jumping (*not made yet)

Two 4-bit registers (8-bits/1-byte total)

**Two 7segment displays for both registers (**Also not made yet)

Im not yet sure about the Program memory size…