Adder/Subtractor 8 Bit Module
A little module I put together for use in my ALU, contains an adder/subtracter. Enter two 8 bit numbers, choose whether to add and subtract and an output is produced on the other side of the module. Output is 9 bit, although you don't have to use the last bit, and an extra output is included indicating whether the output is using two's compliment (negative number) for help decoding.