#include "sf_timer.h"


void change_time(unsigned int new_count)
{
         outportb(CONTROL_8253,CONTROL_WORD);
         outportb(COUNTER_0,LOW_BYTE(new_count));
         outportb(COUNTER_0,HIGH_BYTE(new_count));
}

void set_30hz()
{
        change_time(TIMER_30HZ);
}

void set_18hz()
{
        change_time(TIMER_18HZ);
}

void set_20hz()
{
        change_time(TIMER_20HZ);
}

void set_60hz()
{
        change_time(TIMER_60HZ);
}