18 4bit Adder

18 : 4bit Adder

How it works

The halfadder uses simple logic gates.

How to test

Input bits 0-3 are used for the first number and bits 4-7 for the second number. The output bits 0-3 are the resulting number an bit 4 the carry. All numbers should be in little endian format.


# Input Output
0 a0 r0
1 a1 r1
2 a2 r2
3 a3 r3
4 b0 carry
5 b1 none
6 b2 none
7 b3 none