fixed calculation of memory address

reactos/drivers/video/videoprt

diff -u -r1.6 -r1.7
--- int10.c	18 Jun 2004 17:20:49 -0000	1.6
+++ int10.c	19 Jul 2004 17:55:33 -0000	1.7
@@ -18,7 +18,7 @@

  * If not, write to the Free Software Foundation,
  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  *

- * $Id: int10.c,v 1.6 2004/06/18 17:20:49 navaraf Exp $

+ * $Id: int10.c,v 1.7 2004/07/19 17:55:33 weiden Exp $

  */
 
 #include "videoprt.h"

@@ -63,10 +63,10 @@

    }
 
    *Seg = (ULONG)MemoryAddress >> 4;

-   *Off = (ULONG)MemoryAddress & 0xFF;

+   *Off = (ULONG)MemoryAddress & 0xF;

 
    DPRINT("- Segment: %x\n", (ULONG)MemoryAddress >> 4);

-   DPRINT("- Offset: %x\n", (ULONG)MemoryAddress & 0xFF);

+   DPRINT("- Offset: %x\n", (ULONG)MemoryAddress & 0xF);

    DPRINT("- Length: %x\n", *Length);
 
    IntDetachFromCSRSS(&CallingProcess, &PrevAttachedProcess);

@@ -80,7 +80,7 @@

    IN USHORT Seg,
    IN USHORT Off)
 {

-   PVOID MemoryAddress = (PVOID)((Seg << 4) + Off);

+   PVOID MemoryAddress = (PVOID)((Seg << 4) | Off);

    NTSTATUS Status;
    PEPROCESS CallingProcess; 
    PEPROCESS PrevAttachedProcess; 

@@ -115,7 +115,7 @@

    DPRINT("- Length: %x\n", Length);
 
    IntAttachToCSRSS(&CallingProcess, &PrevAttachedProcess);

-   RtlCopyMemory(Buffer, (PVOID)((Seg << 4) + Off), Length);

+   RtlCopyMemory(Buffer, (PVOID)((Seg << 4) | Off), Length);

    IntDetachFromCSRSS(&CallingProcess, &PrevAttachedProcess);
 
    return NO_ERROR;

@@ -139,7 +139,7 @@

    DPRINT("- Length: %x\n", Length);
 
    IntAttachToCSRSS(&CallingProcess, &PrevAttachedProcess);

-   RtlCopyMemory((PVOID)((Seg << 4) + Off), Buffer, Length);

+   RtlCopyMemory((PVOID)((Seg << 4) | Off), Buffer, Length);

    IntDetachFromCSRSS(&CallingProcess, &PrevAttachedProcess);
 
    return NO_ERROR;