MOV CX，AXMOV BH，0BHMOV BL，[0BH]MOV AL，[BP+0BH]MOV [BP+SI+0BH]，ALXCHG DX，SIXCHG AL，[BX+SI]LDS SI，SRCLES DI，DSTPUSHFPOPFADD AX，DXSUB AH，BLINC CXMOV AL，3AND AL，7FHOR DX，5555HXOR AL，10000000BTEST AL，80H