A.SETBA,#01H B.SETBA,0 C.ORLA,#01H D.SETBA,#00H
A.CPLR0.7 B.XRL00H,#80H C.CPL(R0).7 D.ARLR0,#80H
A.ANL0,#7FH B.ANLR0,#FH C.ORLR0,#7FH D.ORLR0,#80H