Signed Numbers must be represented as Unsigned

In all arithmetic operations, there shouldn't be a signed number represented. Example here:

```
0: CP   100 102 
1: NAND 100 100
2: ADDi  100 1
3: ADD  100 101
4: BZJi 5 0
5: 4

100: 100
101: 100
102: 102
```
