#include <dos.h>
#include <time.h>
#include <stdio.h>

void main( void )
{
  clock_t start, end;
  float cont;

  cont = 0;
  start = clock();
  while ( ((clock() - start) / CLK_TCK) < 20 )
  {
   outportb( 0x378, 0x00 ); cont++;
  }

  printf("En 20 segundo, realice %f outports\n", cont );
  cont /= 20;
  printf("%f por segundo... (%f Kb/s)\n", cont, (cont/1024) );
  printf("2 bit (segidos) -> 1 Hz ===>>> %f KHz\n", (cont/2000) );

}