CF OF SF ZF PF
sub al,al 0 0 0 1 1
mov al,10h 0 0 0 1 1
add al,90h 0 0 1 0 1
mov al,80h 0 0 1 0 1
add al,80h 1 1 0 1 1
mov al,0fch 1 1 0 1 1
add al,05h 1 0 0 0 0
mov al,7dh 1 0 0 0 0
add al,0bh 0 1 1 0 1