*/
#define TESTING
-#define IPS_DISPLAY
+/*
+ * Activate IPS_DISPLAY if you want to display the
+ * number of instructions per second, as well as
+ * the computed number of ticks for the PIT.
+ */
+// #define IPS_DISPLAY
+
+/*
+ * Activate WORKING_TIMER when the PIT timing problem is fixed.
+ */
+// #define WORKING_TIMER
/* PUBLIC VARIABLES ***********************************************************/
/* Main loop */
while (VdmRunning)
{
+#ifdef WORKING_TIMER
DWORD PitResolution = PitGetResolution();
+#endif
DWORD RtcFrequency = RtcGetTicksPerSecond();
/* Get the current number of ticks */
CurrentTickCount = GetTickCount();
+#ifdef WORKING_TIMER
if ((PitResolution <= 1000) && (RtcFrequency <= 1000))
{
/* Calculate the approximate performance counter value instead */
* (Frequency.QuadPart / 1000);
}
else
+#endif
{
/* Get the current performance counter value */
QueryPerformanceCounter(&Counter);
#ifdef IPS_DISPLAY
if ((CurrentTickCount - LastCyclePrintout) >= 1000)
{
- DPRINT1("NTVDM: %lu Instructions Per Second\n", Cycles);
+ DPRINT1("NTVDM: %lu Instructions Per Second; TimerTicks = %I64d\n", Cycles, TimerTicks);
LastCyclePrintout = CurrentTickCount;
Cycles = 0;
}