h89s.asm

来自「上课老师给的8086仿真器」· 汇编 代码 · 共 25 行

CODE SEGMENT
ASSUME CS:CODE
DAPORT	EQU 0020H
	ORG 1600h
START:	MOV AL,0FFH
        MOV DX,DAPORT
	OUT DX,AL
DACON2: DEC AL
        CALL DELAY
        OUT DX,AL
        CMP AL,0H
        JNZ DACON2
        CALL DELAY
DACON3: INC AL
        OUT DX,AL
        CALL DELAY
        CMP AL,0FFH
        JNZ DACON3
        JMP START
DELAY:	MOV CX,1000H
DELAY1:	LOOP DELAY1
        RET
 CODE ENDS
END  START