#include <dos.h>
void interrupt(*old)();
void interrupt newint9();
unsigned int far *scr=0xb8720000;

void main()
{
clrscr();
old=getvect(0x09);
setvect(0x09,newint9);




keep(0,1000);
getch();

}
void interrupt newint9()
{
if (inportb(0x60)==0x19) //corrected
{
(*scr)=0x7042;
(*(scr+1))=0x7043;
(*(scr+2))=0x7230;
(*(scr+3))=0x7131;
(*(scr+4))=0x7432;
(*(scr+5))=0x7133;
(*(scr+6))=0x7434;
(*(scr+7))=0x7135;
(*(scr+8))=0x7436;
(*(scr+9))=0x7137;
(*(scr+10))=0x7438;
}

if (inportb(0x60)==0x2e)
{
clrscr();

}

//outportb(0X20,0x20);
//return;


(*old)();
}