#include <conio.h>
#include <dos.h>
#include <bios.h>
#include  <stdlib.h>
/*#include <butil.h>      */
#include <time.h>


#define    utlobyte(l) (unsigned char) (0xFF & l)
#define    uthibyte(h) (unsigned char) (0xFF & (h>> 8 ))
#define    utoutp(p,b)   outportb (p, b)

#define PB8255	  0x61		      /* Port B of the 8255 chip.   */
#define LTC8253   0x40		      /* Latch register 8253 (timer)*/
#define CMD8253   0x43		      /* Command register of 8253.  */

#define CLKFREQ   1193180L	      /* System clock frequency.    */
void  tick(double freq);
/*
main(int argc, char **argv)
{ double freq;
   if(argc>1)                  {
	  freq = (double)atoi(argv[1]);

   }
   else
	freq = (double)CLK_TCK;
  tick(freq);
return(0);
}
*/
void tick(double freq)
{
    unsigned char i;
    unsigned latch;
	/* Divide clock frequency by requested speaker frequency to */
	/* generate value for the timer latch.			    */
	/* 0b6 == 182 == '10110110'b need '00110110' for 0 chanel   */
	/*                                 00000110*/
	i = (unsigned char)0x0b6 -(unsigned char) 128 - 32 - 16 ;
	utoutp (CMD8253, i);
	if(freq < CLK_TCK +  2 )
		latch = 65536L;
	else
		latch = (unsigned) (CLKFREQ/freq);

	utoutp (LTC8253, utlobyte(latch));
	utoutp (LTC8253, uthibyte(latch));
}

start "mpr" /realtime /wait bin\menu % 1  bin\menu.in