/* INCLUDES *******************************************************************/
+#define NDEBUG
+
#include "ntvdm.h"
#include "emulator.h"
#include "bios.h"
+#include "vga.h"
#include "dos.h"
#include "timer.h"
#include "pic.h"
#include "ps2.h"
+/*
+ * Activate this line if you want to be able to test NTVDM with:
+ * ntvdm.exe <program>
+ */
+#define TESTING
+
/* PUBLIC VARIABLES ***********************************************************/
BOOLEAN VdmRunning = TRUE;
LPVOID BaseAddress = NULL;
-LPCWSTR ExceptionName[] =
-{
- L"Division By Zero",
- L"Debug",
- L"Unexpected Error",
- L"Breakpoint",
- L"Integer Overflow",
- L"Bound Range Exceeded",
- L"Invalid Opcode",
- L"FPU Not Available"
-};
/* PUBLIC FUNCTIONS ***********************************************************/
va_start(Parameters, Format);
_vsnwprintf(Buffer, 256, Format, Parameters);
- MessageBox(NULL, Buffer, L"NTVDM Subsystem", MB_OK);
+ MessageBoxW(NULL, Buffer, L"NTVDM Subsystem", MB_OK);
va_end(Parameters);
}
INT wmain(INT argc, WCHAR *argv[])
{
INT i;
- CHAR CommandLine[128];
+ CHAR CommandLine[DOS_CMDLINE_LENGTH];
DWORD CurrentTickCount;
- DWORD LastTickCount = GetTickCount();
DWORD Cycles = 0;
DWORD LastCyclePrintout = GetTickCount();
DWORD LastVerticalRefresh = GetTickCount();
LARGE_INTEGER Frequency, LastTimerTick, Counter;
LONGLONG TimerTicks;
- HANDLE ConsoleInput = INVALID_HANDLE_VALUE;
- HANDLE ConsoleOutput = INVALID_HANDLE_VALUE;
- CONSOLE_SCREEN_BUFFER_INFO SavedBufferInfo;
+ HANDLE InputThread = NULL;
/* Set the handler routine */
SetConsoleCtrlHandler(ConsoleCtrlHandler, TRUE);
- /* Get the input and output handles to the real console */
- ConsoleInput = CreateFile(TEXT("CONIN$"),
- GENERIC_READ | GENERIC_WRITE,
- FILE_SHARE_READ | FILE_SHARE_WRITE,
- NULL,
- OPEN_EXISTING,
- 0,
- NULL);
-
- ConsoleOutput = CreateFile(TEXT("CONOUT$"),
- GENERIC_READ | GENERIC_WRITE,
- FILE_SHARE_READ | FILE_SHARE_WRITE,
- NULL,
- OPEN_EXISTING,
- 0,
- NULL);
-
- if ((ConsoleInput == INVALID_HANDLE_VALUE)
- || (ConsoleOutput == INVALID_HANDLE_VALUE))
+#ifndef TESTING
+ UNREFERENCED_PARAMETER(argc);
+ UNREFERENCED_PARAMETER(argv);
+
+ /* The DOS command line must be ASCII */
+ WideCharToMultiByte(CP_ACP, 0, GetCommandLine(), -1, CommandLine, sizeof(CommandLine), NULL, NULL);
+#else
+ if (argc == 2 && argv[1] != NULL)
{
- wprintf(L"FATAL: Could not get handles to the console\n");
- goto Cleanup;
+ WideCharToMultiByte(CP_ACP, 0, argv[1], -1, CommandLine, sizeof(CommandLine), NULL, NULL);
}
-
- /* Save the console screen buffer information */
- if (!GetConsoleScreenBufferInfo(ConsoleOutput, &SavedBufferInfo))
+ else
{
- wprintf(L"FATAL: Could not save the console screen buffer information\n");
- goto Cleanup;
+ wprintf(L"\nReactOS Virtual DOS Machine\n\n"
+ L"Usage: NTVDM <executable>\n");
+ return 0;
}
-
- /* The DOS command line must be ASCII */
- WideCharToMultiByte(CP_ACP, 0, GetCommandLine(), -1, CommandLine, 128, NULL, NULL);
+#endif
if (!EmulatorInitialize())
{
}
/* Initialize the system BIOS */
- if (!BiosInitialize(ConsoleInput, ConsoleOutput))
+ if (!BiosInitialize())
{
wprintf(L"FATAL: Failed to initialize the VDM BIOS.\n");
goto Cleanup;
DisplayMessage(L"Could not start program: %S", CommandLine);
return -1;
}
-
+
+ /* Start the input thread */
+ InputThread = CreateThread(NULL, 0, &InputThreadProc, NULL, 0, NULL);
+
/* Set the last timer tick to the current time */
QueryPerformanceCounter(&LastTimerTick);
/* Main loop */
while (VdmRunning)
{
+ /* Get the resolution of the system timer */
+ DWORD TimerResolution = PitGetResolution();
+
/* Get the current number of ticks */
CurrentTickCount = GetTickCount();
-
- /* 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;
-
+
+ if (TimerResolution > 1000)
+ {
+ /* 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;
+ }
+ else
+ {
+ /* Use the standard tick count */
+ Counter.QuadPart = CurrentTickCount;
+
+ /* Get the number of PIT ticks that have passed */
+ TimerTicks = ((Counter.QuadPart - LastTimerTick.QuadPart)
+ * PIT_BASE_FREQUENCY) / 1000;
+ }
+
/* Update the PIT */
- for (i = 0; i < TimerTicks; i++) PitDecrementCount();
- LastTimerTick = Counter;
-
- /* Check for console input events every millisecond */
- if (CurrentTickCount != LastTickCount)
+ if (TimerTicks > 0)
{
- CheckForInputEvents();
- LastTickCount = CurrentTickCount;
+ for (i = 0; i < TimerTicks; i++) PitDecrementCount();
+ LastTimerTick = Counter;
}
- /* Check for vertical refresh */
+ /* Check for vertical retrace */
if ((CurrentTickCount - LastVerticalRefresh) >= 16)
{
- BiosVerticalRefresh();
+ VgaRefreshDisplay();
LastVerticalRefresh = CurrentTickCount;
}
-
+
+ /* Horizontal retrace occurs as fast as possible */
+ VgaHorizontalRetrace();
+
/* Continue CPU emulation */
for (i = 0; (i < STEPS_PER_CYCLE) && VdmRunning; i++)
{
EmulatorStep();
Cycles++;
}
-
+
if ((CurrentTickCount - LastCyclePrintout) >= 1000)
{
- DPRINT1("NTVDM: %d Instructions Per Second\n", Cycles);
+ DPRINT1("NTVDM: %lu Instructions Per Second\n", Cycles);
LastCyclePrintout = CurrentTickCount;
Cycles = 0;
}
}
-Cleanup:
- /* Restore the old screen buffer */
- SetConsoleActiveScreenBuffer(ConsoleOutput);
-
- /* Restore the screen buffer size */
- SetConsoleScreenBufferSize(ConsoleOutput, SavedBufferInfo.dwSize);
+ /* Perform another screen refresh */
+ VgaRefreshDisplay();
+Cleanup:
+ if (InputThread != NULL) CloseHandle(InputThread);
+ BiosCleanup();
EmulatorCleanup();
- /* Close the console handles */
- if (ConsoleInput != INVALID_HANDLE_VALUE) CloseHandle(ConsoleInput);
- if (ConsoleOutput != INVALID_HANDLE_VALUE) CloseHandle(ConsoleOutput);
-
return 0;
}
projects / reactos.git / blobdiff