To learn and practice schematic entry and simulation.

Problem: Implement an ALU $($Arithmetic Logic Unit$)$ satisfying the following functional

requirements. You should complete schematic capture tutorial $($Tutorial$\_$Lab$1.$pdf$),$ before you

start on this lab.

Figure $1$: ALU Port Interface and Function Table

Implement your design in two$$s complement signed system, discard the end$-$round carry. Do not

use the cases that lead to overflow, i$.$e$.,$ adding two positive or adding two negative numbers

$($sometimes$),$ and subtracting a positive and a negative number and vice versa $($sometimes$).$

$-$ Invert example: $1101$ will be $0010$

$-$ Add example: $0110($which is $+6)+0001($which is $+1)=0111(+7)$

$-$ Add example: $0111($which is $+7)+0001($which is $+1)$ gives $1000(-8),$ overflow

$-$ Add example: $1111(-1)+0111(+7)=0110(+6)$

$-$ Subtract example: $1111(-1)1110(-2)=0001(+1)$

$-$ Subtract example: $0001(+1)1000(-8),$ gives $1001,$ overflow