Jam STAPL Byte-Code Player TCK Speed Slow

So looking at the code located in the jbistub.c file I found this;

void calibrate_delay(void)
{
	int sample = 0;
	int count = 0;
	DWORD tick_count1 = 0L;
	DWORD tick_count2 = 0L;
	one_ms_delay = 0L;
# if PORT == WINDOWS || PORT == DOS
	for (sample = 0; sample < DELAY_SAMPLES; ++sample)
	{
		count = 0;
		tick_count1 = get_tick_count();
		while ((tick_count2 = get_tick_count()) == tick_count1) {};
		do { delay_loop(DELAY_CHECK_LOOPS); count++; } while
			((tick_count1 = get_tick_count()) == tick_count2);
		one_ms_delay += ((DELAY_CHECK_LOOPS * (DWORD)count) /
			(tick_count1 - tick_count2));
	}
	one_ms_delay /= DELAY_SAMPLES;
# else
	/* This is system-dependent!  Update this number for target system */
	one_ms_delay = 1000L;
# endif
}   // end calibrate_delay()

It looks like its trying to count the amount a clock ticks in between a certain time period and then calculate how many clock ticks it would take for 1 milisecond to occur. However I am not sure if this is being done correctly.

Another thing to note is that I am using a Win7 Pro 64-bit machine with a 4 core CPU. I have noticted that when running the jam player code that exactly 25% CPU is being used (or one core). I am Not sure if that is related to the issue or not but thought it be worth mentioning.