.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;
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