#include <conio.h>
#include <stdio.h>
#include <math.h>
main()
{
  outp(0x303,0x80); 
  unsigned char v1; 
  float Vout,magnitude;
  int a;
  printf("\n Press any key to exit this program\n");
  do
  {
    for (a=0;a<360;a++) 
    {
      Vout=5.0+(5.0 * sin ((3.14*a)/180)); 
      magnitude=Vout * 25.6; 
      v1=(char)magnitude; 
      delay(1);
      outp(0x300,v1); 
      }
    }
  while(!kbhit()); 
  return(0);
  }