Contents of the register (Before) Contents of the register (After) Instruction CF OF SF ZF al=40h | add al, 40h ;assume values are unsigned Int add bh, 80h ;assume values are unsigned Int bh=80h cl=40h | add cl, 40h ;assume values are signed Int bh= | add bh, 01h ;assume values are the value unsigned Int from the last operation cl= the value from signed Int the last operation sub cl,-01h ;assume values are