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[NTVDM]

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Initialize LastClockUpdate, LastVerticalRefresh and LastCyclePrintout with the value of StartTickCount.

svn path=/branches/ntvdm/; revision=61021
This commit is contained in:
Hermès Bélusca-Maïto 2013-11-17 20:44:23 +00:00
parent da7d643e51
commit fb031ba118
1 changed files with 13 additions and 11 deletions
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24
subsystems/ntvdm/ntvdm.c
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@ -70,15 +70,14 @@ INT wmain(INT argc, WCHAR *argv[])
{
INT i;
CHAR CommandLine[DOS_CMDLINE_LENGTH];
DWORD CurrentTickCount;
DWORD Cycles = 0;
DWORD LastCyclePrintout = GetTickCount();
DWORD LastVerticalRefresh = GetTickCount();
DWORD LastClockUpdate = GetTickCount();
LARGE_INTEGER StartPerfCount;
LARGE_INTEGER Frequency, LastTimerTick, LastRtcTick, Counter;
LONGLONG TimerTicks;
LARGE_INTEGER StartPerfCount;
DWORD StartTickCount;
DWORD StartTickCount, CurrentTickCount;
DWORD LastClockUpdate;
DWORD LastVerticalRefresh;
DWORD LastCyclePrintout;
DWORD Cycles = 0;
/* Set the handler routine */
SetConsoleCtrlHandler(ConsoleCtrlHandler, TRUE);
@ -109,7 +108,7 @@ INT wmain(INT argc, WCHAR *argv[])
wprintf(L"FATAL: Failed to initialize the CPU emulator\n");
goto Cleanup;
}
/* Initialize the performance counter (needed for hardware timers) */
if (!QueryPerformanceFrequency(&Frequency))
{
@ -151,7 +150,10 @@ INT wmain(INT argc, WCHAR *argv[])
/* Find the starting performance and tick count */
StartTickCount = GetTickCount();
QueryPerformanceCounter(&StartPerfCount);
/* Set the different last counts to the starting count */
LastClockUpdate = LastVerticalRefresh = LastCyclePrintout = StartTickCount;
/* Set the last timer ticks to the current time */
LastTimerTick = LastRtcTick = StartPerfCount;
@ -163,7 +165,7 @@ INT wmain(INT argc, WCHAR *argv[])
/* Get the current number of ticks */
CurrentTickCount = GetTickCount();
if ((PitResolution <= 1000) && (RtcFrequency <= 1000))
{
/* Calculate the approximate performance counter value instead */
@ -176,7 +178,7 @@ INT wmain(INT argc, WCHAR *argv[])
/* Get the current performance counter value */
QueryPerformanceCounter(&Counter);
}
/* Get the number of PIT ticks that have passed */
TimerTicks = ((Counter.QuadPart - LastTimerTick.QuadPart)
* PIT_BASE_FREQUENCY) / Frequency.QuadPart;