[aandrejevic] 59298: [NTVDM] Perform multiple CPU instructions in one emulator cycle.

Author: aandrejevic
Date: Sun Jun 23 00:20:24 2013
New Revision: 59298

URL: http://svn.reactos.org/svn/reactos?rev=59298&view=rev
Log:
[NTVDM]
Perform multiple CPU instructions in one emulator cycle.

Modified:
    branches/ntvdm/subsystems/ntvdm/ntvdm.c
    branches/ntvdm/subsystems/ntvdm/ntvdm.h

Modified: branches/ntvdm/subsystems/ntvdm/ntvdm.c
URL: http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/ntvdm.c?r...
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/ntvdm.c	[iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/ntvdm.c	[iso-8859-1] Sun Jun 23 00:20:24 2013
@@ -156,9 +156,9 @@
         }

/* Continue CPU emulation */
-        EmulatorStep();
+        for (i = 0; i < STEPS_PER_CYCLE; i++) EmulatorStep();

-        Cycles++;
+        Cycles += STEPS_PER_CYCLE;
         if ((CurrentTickCount - LastCyclePrintout) >= 1000)
         {
             DPRINT1("NTVDM: %d Instructions Per Second\n", Cycles);

Modified: branches/ntvdm/subsystems/ntvdm/ntvdm.h
URL: http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/ntvdm.h?r...
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/ntvdm.h	[iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/ntvdm.h	[iso-8859-1] Sun Jun 23 00:20:24 2013
@@ -32,6 +32,7 @@
 #define SPECIAL_INT_NUM 0xFF
 #define SEGMENT_TO_MCB(seg) ((PDOS_MCB)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
 #define SEGMENT_TO_PSP(seg) ((PDOS_PSP)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
+#define STEPS_PER_CYCLE 256

/* DOS constants */
 #define DOS_VERSION 0x0600