接口实验

.486p data segement at 0 use16 org 1000h;data ends;code segment use16; org 1500h; assume cs:code, ds:data; start: mov ax,data; mov ds,ax;LP1:mov dx,308H; out dx,al; push dx; mov dx,320h;next: in al,dx; test al,01h; jz next; pop dx in al,dx;push ax ; and al,0fh; mov dx,204h; out dx,al; pop ax; mov cl,4; shr al,cl; xlat; mov dx,200h; out dx,al; jmp LP1; hlt;