sy14-1-2.asm

来自「分别为产生步长为1的三角波」· 汇编 代码 · 共 29 行

SSEG SEGMENT STACK
     DB 100 DUP(?)
SSEG ENDS
DATA	SEGMENT	
DATA	ENDS
CODE 	SEGMENT
	ASSUME	CS:CODE,DS:DATA

START:	MOV	AX,DATA
	MOV 	DS,AX
	MOV	DX,9800H
	MOV	AL,80H
GOON1:	OUT	DX,AL
	INC	AL
	CMP	AL,0FFH
	JZ	GOON2
	JMP	GOON1
GOON2:	OUT 	DX,AL
	DEC	AL
	CMP	AL,80H
	JNZ	GOON2
	JMP	GOON1
	
	
        MOV	AH,4CH
	INT	21H

CODE	ENDS
END	START