[aandrejevic] 71806: [NTVDM] Remove the standard VGA modes from the VBE table as they're irrelevant for the VBE driver. Fix several bugs in INT 10h, AX = 4F02h: - Don't crash if the video mode was ...

Author: aandrejevic
Date: Mon Jul  4 04:08:01 2016
New Revision: 71806

URL: http://svn.reactos.org/svn/reactos?rev=71806&view=rev
Log:
[NTVDM]
Remove the standard VGA modes from the VBE table as they're irrelevant for the
VBE driver.
Fix several bugs in INT 10h, AX = 4F02h:
- Don't crash if the video mode was not found.
- AH should be set to 1 on failure, and 0 on success.


Modified:
    trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/vbe.c
    trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/vbe.h

Modified: trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/vbe.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/mvdm/ntvdm/bios…
==============================================================================
--- trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/vbe.c	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/vbe.c	[iso-8859-1] Mon Jul  4 04:08:01
2016
@@ -25,21 +25,6 @@
 /* PRIVATE VARIABLES **********************************************************/
 
 static const VBE_MODE Modes[VBE_MODE_COUNT] = {
-    { 0x00, 0x00,   NULL /* TODO */, NULL /* VGA */  },
-    { 0x01, 0x01,   NULL /* TODO */, NULL /* VGA */  },
-    { 0x02, 0x02,   NULL /* TODO */, NULL /* VGA */  },
-    { 0x03, 0x03,   NULL /* TODO */, NULL /* VGA */  },
-    { 0x04, 0x04,   NULL /* TODO */, NULL /* VGA */  },
-    { 0x05, 0x05,   NULL /* TODO */, NULL /* VGA */  },
-    { 0x06, 0x06,   NULL /* TODO */, NULL /* VGA */  },
-    { 0x07, 0x07,   NULL /* TODO */, NULL /* VGA */  },
-    { 0x0D, 0x0D,   NULL /* TODO */, NULL /* VGA */  },
-    { 0x0E, 0x0E,   NULL /* TODO */, NULL /* VGA */  },
-    { 0x0F, 0x0F,   NULL /* TODO */, NULL /* VGA */  },
-    { 0x10, 0x10,   NULL /* TODO */, NULL /* VGA */  },
-    { 0x11, 0x11,   NULL /* TODO */, NULL /* VGA */  },
-    { 0x12, 0x12,   NULL /* TODO */, NULL /* VGA */  },
-    { 0x13, 0x13,   NULL /* TODO */, NULL /* VGA */  },
     { 0x14, 0xFFFF, NULL /* TODO */, NULL            },
     { 0x54, 0x10A,  NULL /* TODO */, NULL /* TODO */ },
     { 0x55, 0x109,  NULL /* TODO */, NULL /* TODO */ },
@@ -368,23 +353,25 @@
         /* Set VBE Mode */
         case 0x02:
         {
-            PCVBE_MODE Mode = VbeGetModeByNumber(getBX());
-
-            if (Mode->Registers == NULL)
+            WORD VesaNumber = getBX();
+            setAL(0x4F);
+
+            if (getBX() <= BIOS_MAX_VIDEO_MODE)
             {
                 /* Call the VGA BIOS */
                 setAH(0x00);
-                setAL(Mode->Number);
+                setAL(VesaNumber);
                 Int32Call(&BiosContext, BIOS_VIDEO_INTERRUPT);
 
-                setAL(0x4F);
-                setAH(Bda->VideoMode == Mode->Number);
+                setAH(Bda->VideoMode != VesaNumber);
             }
             else
             {
                 /* This is an extended video mode */
-                setAL(0x4F);
-                setAH(VbeSetExtendedVideoMode(Mode->Number));
+                PCVBE_MODE Mode = VbeGetModeByNumber(VesaNumber);
+
+                if (Mode) setAH(!VbeSetExtendedVideoMode(Mode->Number));
+                else setAH(1);
             }
 
             break;

Modified: trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/vbe.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/mvdm/ntvdm/bios…
==============================================================================
--- trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/vbe.h	[iso-8859-1] (original)
+++ trunk/reactos/subsystems/mvdm/ntvdm/bios/bios32/vbe.h	[iso-8859-1] Mon Jul  4 04:08:01
2016
@@ -97,7 +97,7 @@
     BYTE Number;
     WORD VesaNumber;
     PVBE_MODE_INFO Info;
-    PSVGA_REGISTERS Registers; // NULL means "forward to VGABIOS"
+    PSVGA_REGISTERS Registers;
 } VBE_MODE, *PVBE_MODE;
 
 typedef const struct _VBE_MODE *PCVBE_MODE;