王爽 汇编 实验14

assume cs:code,ds:data

data segment
	db "YY/MM/DD HH:MM:SS"
	db 9,8,7,4,2,0
data ends

code segment
start:
	mov ax,data
	mov ds,ax
	mov cx,6
	mov si,0;作为data段索引,+3
    mov di,17;作为CMOS索引,+1

	s1:
	push cx
	mov al,[di]
	out 70h,al
	in al,71h;在CMOS获取到相应数据的BCD码

	mov ah,al
	mov cl,4
	shr ah,cl
	and al,00001111b

	add al,30h
	add ah,30h
	mov [si],ah
	mov [si+1],al

	add si,3
	add di,1
	pop cx
	loop s1

	mov ax,data
	mov ds,ax
	mov si,0;+1
	mov cx,17

	mov ax,0b800h
	mov es,ax
	mov di,160*13+32*2;+2

	s2:
	mov al,[si]
	mov es:[di],al
	mov al,02h
	mov es:[di+1],al

	inc si
	add di,2
	loop s2

	mov ax,4c00h
	int 21h

	
code ends
end start