[aandrejevic] 67574: [NTVDM] Implement EMS functions AH = 47h and AH = 48h (Save/Restore Page Map).

Author: aandrejevic
Date: Wed May  6 03:52:19 2015
New Revision: 67574

URL: http://svn.reactos.org/svn/reactos?rev=67574&view=rev
Log:
[NTVDM]
Implement EMS functions AH = 47h and AH = 48h (Save/Restore Page Map).

Modified:
    trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/emsdrv.c

Modified: trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/emsdrv.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/mvdm/ntvdm/dos/d...
==============================================================================
--- trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/emsdrv.c	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/emsdrv.c	[iso-8859-1] Wed May  6 03:52:19 2015
@@ -162,6 +162,8 @@

static VOID WINAPI EmsIntHandler(LPWORD Stack)
 {
+    static PVOID MappingBackup[EMS_PHYSICAL_PAGES] = { NULL };
+
     switch (getAH())
     {
         /* Get Manager Status */
@@ -218,6 +220,20 @@
         {
             setAH(EMS_STATUS_OK);
             setAL(EMS_VERSION_NUM);
+            break;
+        }
+
+        /* Save Page Map */
+        case 0x47:
+        {
+            RtlCopyMemory(MappingBackup, Mapping, sizeof(PVOID) * EMS_PHYSICAL_PAGES);
+            break;
+        }
+
+        /* Restore Page Map */
+        case 0x48:
+        {
+            RtlCopyMemory(Mapping, MappingBackup, sizeof(PVOID) * EMS_PHYSICAL_PAGES);
             break;
         }