4.1汇编语言的格式 MOV DS.AX MOV SUM,O CYCLE. CMP SUM, 100 JNA NOT DONE MOV ALSUM OUT PORT VALSAL HLT NOT DONE: N AL. PORT VAL ADD SUMAL JMP CYCLE4.1 汇编语言的格式 MOV DS,AX MOV SUM,0 CYCLE: CMP SUM,100 JNA NOT_DONE MOV AL,SUM OUT PORT_VAL,AL HLT NOT_DONE: IN AL,PORT_VAL ADD SUM,AL JMP CYCLE