From 0d91854d88d032ed7003555de38b31276b383bf6 Mon Sep 17 00:00:00 2001
From: Aleksandar Andrejevic <aandrejevic@reactos.org>
Date: Wed, 22 Apr 2015 19:56:50 +0000
Subject: [PATCH] [NTVDM] Implement the XMS functions AH = 03h and AH = 04h
 (global enable/disable A20). Make the GetHandleRecord function in the EMS
 driver inline. CORE-8277 #comment Please retest.

svn path=/trunk/; revision=67352
---
 .../subsystems/mvdm/ntvdm/dos/dos32krnl/emsdrv.c   |  2 +-
 .../subsystems/mvdm/ntvdm/dos/dos32krnl/himem.c    | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/emsdrv.c b/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/emsdrv.c
index 0c1bcb43f92..246e0424018 100644
--- a/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/emsdrv.c
+++ b/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/emsdrv.c
@@ -35,7 +35,7 @@ static PVOID EmsMemory = NULL;
 
 /* PRIVATE FUNCTIONS **********************************************************/
 
-static PEMS_HANDLE GetHandleRecord(USHORT Handle)
+static inline PEMS_HANDLE GetHandleRecord(USHORT Handle)
 {
     if (Handle >= EMS_MAX_HANDLES) return NULL;
     return &HandleTable[Handle];
diff --git a/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.c b/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.c
index 99bbddd581c..f6f4de71e0e 100644
--- a/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.c
+++ b/reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/himem.c
@@ -164,6 +164,20 @@ static VOID WINAPI XmsBopProcedure(LPWORD Stack)
             break;
         }
 
+        /* Global Enable A20 */
+        case 0x03:
+        {
+            EmulatorSetA20(TRUE);
+            break;
+        }
+
+        /* Global Disable A20 */
+        case 0x04:
+        {
+            EmulatorSetA20(FALSE);
+            break;
+        }
+
         /* Query Free Extended Memory */
         case 0x08:
         {