[hbelusca] 61390: [NTVDM] - BIOS: Fix setting video page parameters when setting mode, and effectively fix setting of video page (fix the involved CRTC registers !!). Now Advanced NetWars works wit...
24 Dec
2013
24 Dec
'13
10:40 p.m.
Author: hbelusca
Date: Tue Dec 24 22:40:15 2013
New Revision: 61390
URL: http://svn.reactos.org/svn/reactos?rev=61390&view=rev
Log:
[NTVDM]
- BIOS: Fix setting video page parameters when setting mode, and effectively fix setting
of video page (fix the involved CRTC registers !!).
Now Advanced NetWars works without flickering.
- VGA: Fix code presentation.
Modified:
branches/ntvdm/subsystems/ntvdm/bios.c
branches/ntvdm/subsystems/ntvdm/bios.h
branches/ntvdm/subsystems/ntvdm/vga.c
branches/ntvdm/subsystems/ntvdm/vga.h
Modified: branches/ntvdm/subsystems/ntvdm/bios.c
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/bios.c?r…
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/bios.c [iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/bios.c [iso-8859-1] Tue Dec 24 22:40:15 2013
@@ -254,7 +254,7 @@
};
/* See http://wiki.osdev.org/Drawing_In_Protected_Mode#Locating_Video_Memory */
-static PVGA_REGISTERS VideoModes[] =
+static PVGA_REGISTERS VideoModes[BIOS_MAX_VIDEO_MODE + 1] =
{
&VideoMode_40x25_text, /* Mode 00h */ // 16 color (mono)
&VideoMode_40x25_text, /* Mode 01h */ // 16 color
@@ -272,10 +272,21 @@
&VideoMode_320x200_16color, /* Mode 0Dh */ // EGA 320*200 16 color
&VideoMode_640x200_16color, /* Mode 0Eh */ // EGA 640*200 16 color
NULL, /* Mode 0Fh */ // EGA 640*350 mono
- &VideoMode_640x350_16color, /* Mode 10h */ // EGA 640*350 16 color
+ &VideoMode_640x350_16color, /* Mode 10h */ // EGA 640*350 HiRes 16 color
&VideoMode_640x480_2color, /* Mode 11h */ // VGA 640*480 mono
&VideoMode_640x480_16color, /* Mode 12h */ // VGA
&VideoMode_320x200_256color, /* Mode 13h */ // VGA
+};
+
+// FIXME: Are they computable with the previous data ??
+// Values taken from DosBox
+static WORD VideoModePageSize[BIOS_MAX_VIDEO_MODE + 1] =
+{
+ 0x0800, 0x0800, 0x1000, 0x1000,
+ 0x4000, 0x4000, 0x4000, 0x1000,
+ 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x2000, 0x4000, 0x8000,
+ 0x8000, 0xA000, 0xA000, 0x2000
};
/* PRIVATE FUNCTIONS **********************************************************/
@@ -469,6 +480,8 @@
BOOLEAN BiosSetVideoMode(BYTE ModeNumber)
{
INT i;
+ BYTE Page;
+
COORD Resolution;
PVGA_REGISTERS VgaMode = VideoModes[ModeNumber];
@@ -504,12 +517,20 @@
// Bda->CrtModeControl;
// Bda->CrtColorPaletteMask;
+ // Bda->EGAFlags;
+ // Bda->VGAFlags;
/* Update the values in the BDA */
- Bda->VideoMode = ModeNumber;
- Bda->VideoPage = 0;
- Bda->VideoPageSize = BIOS_PAGE_SIZE;
- Bda->VideoPageOffset = 0;
+ Bda->VideoMode = ModeNumber;
+ Bda->VideoPageSize = VideoModePageSize[ModeNumber];
+ Bda->VideoPage = 0;
+ Bda->VideoPageOffset = Bda->VideoPage * Bda->VideoPageSize;
+
+ /* Set the start address in the CRTC */
+ VgaWritePort(VGA_CRTC_INDEX, VGA_CRTC_START_ADDR_LOW_REG);
+ VgaWritePort(VGA_CRTC_DATA , LOBYTE(Bda->VideoPageOffset));
+ VgaWritePort(VGA_CRTC_INDEX, VGA_CRTC_START_ADDR_HIGH_REG);
+ VgaWritePort(VGA_CRTC_DATA , HIBYTE(Bda->VideoPageOffset));
/* Get the character height */
VgaWritePort(VGA_CRTC_INDEX, VGA_CRTC_MAX_SCAN_LINE_REG);
@@ -519,27 +540,39 @@
Bda->ScreenColumns = Resolution.X;
Bda->ScreenRows = Resolution.Y - 1;
+ /* Set cursor position for each page */
+ for (Page = 0; Page < BIOS_MAX_PAGES; ++Page)
+ BiosSetCursorPosition(0, 0, Page);
+
return TRUE;
}
BOOLEAN BiosSetVideoPage(BYTE PageNumber)
{
+ BYTE Row, Column;
+
/* Check if the page exists */
if (PageNumber >= BIOS_MAX_PAGES) return FALSE;
/* Check if this is the same page */
if (PageNumber == Bda->VideoPage) return TRUE;
- /* Set the values in the BDA */
- Bda->VideoPage = PageNumber;
- Bda->VideoPageSize = BIOS_PAGE_SIZE;
- Bda->VideoPageOffset = PageNumber * BIOS_PAGE_SIZE;
+ /* Update the values in the BDA */
+ Bda->VideoPage = PageNumber;
+ Bda->VideoPageOffset = Bda->VideoPage * Bda->VideoPageSize;
/* Set the start address in the CRTC */
- VgaWritePort(VGA_CRTC_INDEX, VGA_CRTC_CURSOR_LOC_LOW_REG);
+ VgaWritePort(VGA_CRTC_INDEX, VGA_CRTC_START_ADDR_LOW_REG);
VgaWritePort(VGA_CRTC_DATA , LOBYTE(Bda->VideoPageOffset));
- VgaWritePort(VGA_CRTC_INDEX, VGA_CRTC_CURSOR_LOC_HIGH_REG);
+ VgaWritePort(VGA_CRTC_INDEX, VGA_CRTC_START_ADDR_HIGH_REG);
VgaWritePort(VGA_CRTC_DATA , HIBYTE(Bda->VideoPageOffset));
+
+ /*
+ * Get the cursor location (we don't update anything on the BIOS side
+ * but we update the cursor location on the VGA side).
+ */
+ BiosGetCursorPosition(&Row, &Column, PageNumber);
+ BiosSetCursorPosition(Row, Column, PageNumber);
return TRUE;
}
Modified: branches/ntvdm/subsystems/ntvdm/bios.h
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/bios.h?r…
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/bios.h [iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/bios.h [iso-8859-1] Tue Dec 24 22:40:15 2013
@@ -38,7 +38,6 @@
#define BIOS_DEFAULT_VIDEO_MODE 0x03
#define BIOS_MAX_PAGES 8
-#define BIOS_PAGE_SIZE 0x1000
#define BIOS_MAX_VIDEO_MODE 0x13
#define DEFAULT_ATTRIBUTE 0x07
Modified: branches/ntvdm/subsystems/ntvdm/vga.c
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/vga.c?re…
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/vga.c [iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/vga.c [iso-8859-1] Tue Dec 24 22:40:15 2013
@@ -645,8 +645,8 @@
INT i, j, k;
COORD Resolution = VgaGetDisplayResolution();
INT AddressSize = VgaGetAddressSize();
- DWORD Address = (VgaCrtcRegisters[VGA_CRTC_START_ADDR_HIGH_REG] << 8)
- + VgaCrtcRegisters[VGA_CRTC_START_ADDR_LOW_REG];
+ DWORD Address = MAKEWORD(VgaCrtcRegisters[VGA_CRTC_START_ADDR_LOW_REG],
+ VgaCrtcRegisters[VGA_CRTC_START_ADDR_HIGH_REG]);
DWORD ScanlineSize = (DWORD)VgaCrtcRegisters[VGA_CRTC_OFFSET_REG] * 2;
/*
Modified: branches/ntvdm/subsystems/ntvdm/vga.h
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/subsystems/ntvdm/vga.h?re…
==============================================================================
--- branches/ntvdm/subsystems/ntvdm/vga.h [iso-8859-1] (original)
+++ branches/ntvdm/subsystems/ntvdm/vga.h [iso-8859-1] Tue Dec 24 22:40:15 2013
@@ -2,7 +2,7 @@
* COPYRIGHT: GPL - See COPYING in the top level directory
* PROJECT: ReactOS Virtual DOS Machine
* FILE: vga.h
- * PURPOSE: VGA hardware emulation (header file)
+ * PURPOSE: VGA hardware emulation
* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
*/
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