中断数码管二.txt

汇编程序

	assume cs:code
        code segment public
        org 100h
start: mov cx,0
       jmp start1
       segcod db 3fh,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh,77h,7ch,39h,5eh,79h,71h
start1:  cli
	mov dx,04a0h
        mov ax,13h
        out dx,ax			;ICW1, ICW4 NEEDED
        mov dx,04a2h
	mov ax,80h
	out dx,ax 	 	 	;ICW2 中断类型80h
	mov ax,01h;
	out dx,ax   			;ICW4
	mov ax,00h
	out dx,ax    	              	;OCW1, 开放所有中断
	nop	              		;以上为8259初始化
        mov ax,0
	mov ds,ax
	mov di,200h  		   
	mov ax,offset int0
	mov ds:[di],ax
        add di,2
	mov ds:[di],100h
	add di,2
        mov ax,offset int1
        mov ds;[di],ax
        add di,2
	mov ds:[di],100h            
        sti          
main:	mov ax,7fh
        mov dx,04b0h
        out dx,ax
        jmp main
int0: 	sti                                         
	nop                                         
	mov si,offset segcod 
        mov bx,0                                            
circle1:mov ax,100h
        mov ds,ax
        mov ax,[si+bx]
        mov dx,04b0h
	out dx,al 
        mov cx,50000
  lop1: loop lop1
        inc bx
        cmp bx,10h
        jne circle1
        mov dx,04a0h
        mov ax,20h
        out dx,al
      
 iret                                
int1: 	sti                                           
	nop                                          
	mov si,offset segcod 
        mov bx,0fh                                            
circle2:mov ax,100h
        mov ds,ax
        mov ax,[si+bx]
        mov dx,04b0h
	out dx,al 
        mov cx,50000
  lop2: loop lop2
        dec bx
        cmp bx,0ffh
        jne circle2
        mov dx,04a0h
        mov ax,20h
        out dx,al
        
 iret         

code ends
end start