The ALU of my work in progress CPU/Computer is built, but may need a few little tweaks.
Built using the RDF texture pack
May add download if i get enough likes

Specifications:

13functions

A+B
A-B
B-A
!A
!B
!O
negate A
negate B
Clock register A
Clock register B
Read register A
read register B
Enable ALU output

2x2byte internal memory