sy14-3-1.asm

来自「分别为产生步长为1的三角波」· 汇编 代码 · 共 28 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,0
GOON1:	OUT  DX,AL
	ADD  AL,2
	CMP  AL,0FFH
	JZ   GOON2
	JMP  GOON1
GOON2:	OUT  DX,AL
	SUB  AL,2
	CMP  AL,0
	JNZ  GOON2
	JMP  GOON1
	
	
        MOV  AH,4CH
	INT  21H
CODE	ENDS
END	START