Step 1: Clear register A.
Step 2: Clear register B.
Step 3: Set route to register A.
Step 4: Flip the 4 and the 2 switches (6) down.
Step 5: Press the Load switch to load register A.
Step 6: Set route to register B.
Step 7: Flip the 4 and the 1 switches (5) down.
Step 8: Press the Load switch to load register B.
The Adder produces 11 as the result! (1,2, & 8)
