da_2.asm

我们接口技术做的实验DA

data  segment
sin     db 80h,96h,0aeh,0c5h,0d8h,0e9h,0f5h,0fdh
	db 0ffh,0fdh,0f5h,0e9h,0d8h,0c5h,0aeh,96h
	db 80h,66h,4eh,38h,25h,15h,09h,04h
	db 00h,04h,09h,15h,25h,38h,4eh,66h           ;正弦波数据
data ends
code segment
   assume cs:code,ds:data
start:  mov ax,data
	mov ds,ax
ll:     mov si,offset sin            ;置正弦波数据的偏移地址为SI
	mov bh,32                    ;一组输出32个数据
lll:    mov al,[si]                  ;将数据输出到D/A转换器
	mov dx,290h
	out dx,al
	mov ah,06h
	mov dl,0ffh
	int 21h
	jne exit
	mov cx,1
delay:  loop delay                   ;延时
	inc si                       ;取下一个数据
	dec bh
	jnz lll                      ;若未取完32个数据则转lll
	jmp  ll
exit:   mov ah,4ch                   ;退出
	int 21h
code ends
   end start