[aandrejevic] 71992: [NTVDM] Implement the VGA AC Color Select register. Implement INT 0x10, AH = 0x10, subfunction AL = 0x13.

Author: aandrejevic
Date: Sun Jul 24 18:25:50 2016
New Revision: 71992
URL: http://svn.reactos.org/svn/reactos?rev=71992&view=rev
Log:
[NTVDM]
Implement the VGA AC Color Select register.
Implement INT 0x10, AH = 0x10, subfunction AL = 0x13.
Modified:
    trunk/reactos/subsystems/mvdm/ntvdm/bios/vidbios.c
    trunk/reactos/subsystems/mvdm/ntvdm/hardware/video/svga.c
Modified: trunk/reactos/subsystems/mvdm/ntvdm/bios/vidbios.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/mvdm/ntvdm/bios…
==============================================================================
--- trunk/reactos/subsystems/mvdm/ntvdm/bios/vidbios.c  [iso-8859-1] (original)
+++ trunk/reactos/subsystems/mvdm/ntvdm/bios/vidbios.c  [iso-8859-1] Sun Jul 24 18:25:50
2016
@@ -3379,6 +3379,31 @@
                     break;
                 }
+                /* Set Video DAC Color Page */
+                case 0x13:
+                {
+                    if (getBL() == 0)
+                    {
+                        /* Set the highest bit of the AC Mode Control register to BH */
+                        IOReadB(VGA_INSTAT1_READ);
+                        IOWriteB(VGA_AC_INDEX, VGA_AC_CONTROL_REG);
+                        IOWriteB(VGA_AC_WRITE, (IOReadB(VGA_AC_READ) & 0x7F) |
(getBH() << 7));
+                    }
+                    else if (getBL() == 1)
+                    {
+                        /* Set the AC Color Select register to BH */
+                        IOReadB(VGA_INSTAT1_READ);
+                        IOWriteB(VGA_AC_INDEX, VGA_AC_COLOR_SEL_REG);
+                        IOWriteB(VGA_AC_WRITE, getBH());
+                    }
+                    else
+                    {
+                        DPRINT1("BIOS Palette Control Sub-sub-command BL = 0x%02X
INVALID\n", getBL());
+                    }
+
+                    break;
+                }
+
                 /* Get Individual DAC Register */
                 case 0x15:
                 {
Modified: trunk/reactos/subsystems/mvdm/ntvdm/hardware/video/svga.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/mvdm/ntvdm/hard…
==============================================================================
--- trunk/reactos/subsystems/mvdm/ntvdm/hardware/video/svga.c   [iso-8859-1] (original)
+++ trunk/reactos/subsystems/mvdm/ntvdm/hardware/video/svga.c   [iso-8859-1] Sun Jul 24
18:25:50 2016
@@ -946,8 +946,26 @@
                      * if external palette access is disabled, otherwise (in case
                      * of palette loading) it is a blank pixel.
                      */
-                    PixelData = (VgaAcPalDisable ? VgaAcRegisters[PixelData & 0x0F]
-                                                 : 0);
+
+                    if (VgaAcPalDisable)
+                    {
+                        if (!(VgaAcRegisters[VGA_AC_CONTROL_REG] &
VGA_AC_CONTROL_P54S))
+                        {
+                            /* Bits 4 and 5 are taken from the palette register */
+                            PixelData = ((VgaAcRegisters[VGA_AC_COLOR_SEL_REG] <<
4) & 0xC0)
+                                        | (VgaAcRegisters[PixelData & 0x0F] &
0x3F);
+                        }
+                        else
+                        {
+                            /* Bits 4 and 5 are taken from the color select register */
+                            PixelData = (VgaAcRegisters[VGA_AC_COLOR_SEL_REG] << 4)
+                                        | (VgaAcRegisters[PixelData & 0x0F] &
0x0F);
+                        }
+                    }
+                    else
+                    {
+                        PixelData = 0;
+                    }
                 }
                 /* Take into account DoubleVision mode when checking for pixel updates */