9 Jun
2015
9 Jun
'15
12:56 a.m.
Author: hbelusca
Date: Tue Jun 9 00:56:08 2015
New Revision: 68085
URL: http://svn.reactos.org/svn/reactos?rev=68085&view=rev
Log:
[NTVDM]: Properly set the character height in the BDA per-mode (it appears that they are
decorrelated, in video mode, with the CRTC settings, so I need to store the size
separately instead of computing it by hand); correctly set the proper font when chaanging
modes.
Modified:
trunk/reactos/subsystems/mvdm/ntvdm/bios/vidbios.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] Tue Jun 9 00:56:08
2015
@@ -43,6 +43,7 @@
* VGA Register Configurations for BIOS Video Modes.
* The configurations were checked against SeaBIOS VGA BIOS.
*/
+
static VGA_REGISTERS VideoMode_40x25_text =
{
/* Miscellaneous Register */
@@ -255,41 +256,6 @@
0x0C, 0x0D, 0x0E, 0x0F, 0x41, 0x00, 0x0F, 0x00, 0x00}
};
-/* See http://wiki.osdev.org/Drawing_In_Protected_Mode#Locating_Video_Memory */
-static PVGA_REGISTERS VideoModes[BIOS_MAX_VIDEO_MODE + 1] =
-{
- &VideoMode_40x25_text, /* Mode 00h */ // 16 color (mono)
- &VideoMode_40x25_text, /* Mode 01h */ // 16 color
- &VideoMode_80x25_text, /* Mode 02h */ // 16 color (mono)
- &VideoMode_80x25_text, /* Mode 03h */ // 16 color
- &VideoMode_320x200_4color, /* Mode 04h */ // CGA 4 color
- &VideoMode_320x200_4color, /* Mode 05h */ // CGA same (m) (uses 3rd CGA
palette)
- &VideoMode_640x200_2color, /* Mode 06h */ // CGA 640*200 2 color
- NULL, /* Mode 07h */ // MDA monochrome text 80*25
- NULL, /* Mode 08h */ // PCjr
- NULL, /* Mode 09h */ // PCjr
- NULL, /* Mode 0Ah */ // PCjr
- NULL, /* Mode 0Bh */ // Reserved
- NULL, /* Mode 0Ch */ // Reserved
- &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 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
-};
/*
* BIOS Mode Palettes
@@ -1942,7 +1908,48 @@
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
-PVGA_STATIC_FUNC_TABLE VgaStaticFuncTable;
+
+/*
+ * Table of supported Video Modes.
+ *
+ * See http://wiki.osdev.org/Drawing_In_Protected_Mode#Locating_Video_Memory
+ * Values of PageSize taken from DOSBox.
+ */
+
+typedef struct _VGA_MODE
+{
+ PVGA_REGISTERS VgaRegisters;
+ WORD PageSize;
+ WORD CharacterHeight;
+ // PCOLORREF Palette;
+} VGA_MODE, *PVGA_MODE;
+
+static CONST VGA_MODE VideoModes[BIOS_MAX_VIDEO_MODE + 1] =
+{
+ {&VideoMode_40x25_text, 0x0800, 16}, /* Mode 00h - 16 color (mono)
*/
+ {&VideoMode_40x25_text, 0x0800, 16}, /* Mode 01h - 16 color
*/
+ {&VideoMode_80x25_text, 0x1000, 16}, /* Mode 02h - 16 color (mono)
*/
+ {&VideoMode_80x25_text, 0x1000, 16}, /* Mode 03h - 16 color
*/
+ {&VideoMode_320x200_4color, 0x4000, 8}, /* Mode 04h - CGA 4 color
*/
+ {&VideoMode_320x200_4color, 0x4000, 8}, /* Mode 05h - CGA same (m) (uses
3rd CGA palette) */
+ {&VideoMode_640x200_2color, 0x4000, 8}, /* Mode 06h - CGA 640*200 2 color
*/
+ {NULL, 0x1000, 0}, /* Mode 07h - MDA monochrome text
80*25 */
+ {NULL, 0x0000, 0}, /* Mode 08h - PCjr
*/
+ {NULL, 0x0000, 0}, /* Mode 09h - PCjr
*/
+ {NULL, 0x0000, 0}, /* Mode 0Ah - PCjr
*/
+ {NULL, 0x0000, 0}, /* Mode 0Bh - Reserved
*/
+ {NULL, 0x0000, 0}, /* Mode 0Ch - Reserved
*/
+ {&VideoMode_320x200_16color, 0x2000, 8}, /* Mode 0Dh - EGA 320*200 16
color */
+ {&VideoMode_640x200_16color, 0x4000, 8}, /* Mode 0Eh - EGA 640*200 16
color */
+ {NULL, 0x8000, 0}, /* Mode 0Fh - EGA 640*350 mono
*/
+ {&VideoMode_640x350_16color, 0x8000, 14}, /* Mode 10h - EGA 640*350 HiRes
16 color */
+ {&VideoMode_640x480_2color, 0xA000, 16}, /* Mode 11h - VGA 640*480 mono
*/
+ {&VideoMode_640x480_16color, 0xA000, 16}, /* Mode 12h - VGA
*/
+ {&VideoMode_320x200_256color, 0x2000, 8}, /* Mode 13h - VGA
*/
+};
+
+
+static PVGA_STATIC_FUNC_TABLE VgaStaticFuncTable;
/* PRIVATE FUNCTIONS **********************************************************/
@@ -2384,8 +2391,6 @@
{
BYTE Page;
COORD Resolution;
- PVGA_REGISTERS VgaMode;
-
BYTE OrgModeNumber = ModeNumber;
/*
@@ -2405,12 +2410,10 @@
return FALSE;
}
- VgaMode = VideoModes[ModeNumber];
-
- DPRINT1("Switching to mode %02Xh (%02Xh) %s clearing the screen; VgaMode =
0x%p\n",
- ModeNumber, OrgModeNumber, (DoNotClear ? "without" :
"and"), VgaMode);
-
- if (!VgaSetRegisters(VgaMode)) return FALSE;
+ DPRINT1("Switching to mode %02Xh (%02Xh) %s clearing the screen; VgaRegisters =
0x%p\n",
+ ModeNumber, OrgModeNumber, (DoNotClear ? "without" :
"and"), VideoModes[ModeNumber].VgaRegisters);
+
+ if (!VgaSetRegisters(VideoModes[ModeNumber].VgaRegisters)) return FALSE;
VgaChangePalette(ModeNumber);
@@ -2419,7 +2422,7 @@
/* Update the values in the BDA */
Bda->VideoMode = ModeNumber;
- Bda->VideoPageSize = VideoModePageSize[ModeNumber];
+ Bda->VideoPageSize = VideoModes[ModeNumber].PageSize;
Bda->VideoPage = 0;
Bda->VideoPageOffset = Bda->VideoPage * Bda->VideoPageSize;
@@ -2437,14 +2440,52 @@
IOWriteB(VGA_CRTC_INDEX, VGA_CRTC_START_ADDR_HIGH_REG);
IOWriteB(VGA_CRTC_DATA , HIBYTE(Bda->VideoPageOffset));
- /* Update the character height */
- IOWriteB(VGA_CRTC_INDEX, VGA_CRTC_MAX_SCAN_LINE_REG);
- Bda->CharacterHeight = 1 + (IOReadB(VGA_CRTC_DATA) & 0x1F);
-
/* Update the screen size */
Resolution = VgaGetDisplayResolution();
Bda->ScreenColumns = Resolution.X;
Bda->ScreenRows = Resolution.Y - 1;
+
+ /* Update the current font */
+ Bda->CharacterHeight = VideoModes[ModeNumber].CharacterHeight;
+ switch (Bda->CharacterHeight)
+ {
+ /*
+ * Write the default font to the VGA font plane
+ * and update the BIOS INT 43h vector (far pointer
+ * to the character range 00h-...)
+ */
+ case 8:
+ {
+ VgaWriteFont(0, Font8x8, ARRAYSIZE(Font8x8) / VGA_FONT_CHARACTERS);
+ ((PULONG)BaseAddress)[0x43] = MAKELONG(FONT_8x8_OFFSET,
VIDEO_BIOS_DATA_SEG);
+ break;
+ }
+ case 14:
+ {
+ VgaWriteFont(0, Font8x14, ARRAYSIZE(Font8x14) / VGA_FONT_CHARACTERS);
+ ((PULONG)BaseAddress)[0x43] = MAKELONG(FONT_8x14_OFFSET,
VIDEO_BIOS_DATA_SEG);
+ break;
+ }
+ case 16:
+ {
+ VgaWriteFont(0, Font8x16, ARRAYSIZE(Font8x16) / VGA_FONT_CHARACTERS);
+ ((PULONG)BaseAddress)[0x43] = MAKELONG(FONT_8x16_OFFSET,
VIDEO_BIOS_DATA_SEG);
+ break;
+ }
+ }
+
+#if 0 // Commented, because I need to think about how to change correctly the ScreenRows
+ // in the code that really use it (the Font generator functions of INT 10h,
AH=11h)
+ // so that it also changes the screen resolution *in text mode only*.
+ switch (getBL())
+ {
+ case 0x00: Bda->ScreenRows = getDL()-1; break;
+ case 0x01: Bda->ScreenRows = 13; break;
+ case 0x03: Bda->ScreenRows = 42; break;
+ case 0x02:
+ default : Bda->ScreenRows = 24; break;
+ }
+#endif
/*
* Update the cursor shape (text-mode only).
@@ -2458,8 +2499,6 @@
/* Set the cursor position for each page */
for (Page = 0; Page < BIOS_MAX_PAGES; ++Page)
VidBiosSetCursorPosition(0, 0, Page);
-
- // FIXME: We need to reset the fonts and the font vectors. (INT 1Fh and 43h).
// HACK: We clear here all the text memory. TODO: Do it better!
if (!DoNotClear && ((ModeNumber >= 0x00 && ModeNumber <= 0x03)
|| (ModeNumber == 0x07)))
@@ -3105,11 +3144,12 @@
/* Setup ROM 8x14 Font for Graphics Mode */
case 0x22:
{
- /* Write the default font to the VGA font plane */
+ /*
+ * Write the default font to the VGA font plane
+ * and update the BIOS INT 43h vector (far pointer
+ * to the character range 00h-...)
+ */
VgaWriteFont(0, Font8x14, ARRAYSIZE(Font8x14) /
VGA_FONT_CHARACTERS);
-
- /* Update the BIOS INT 43h vector */
- // Far pointer to the 8x14 characters 00h-...
((PULONG)BaseAddress)[0x43] = MAKELONG(FONT_8x14_OFFSET,
VIDEO_BIOS_DATA_SEG);
/* Update BDA */
@@ -3129,11 +3169,12 @@
/* Setup ROM 8x8 Font for Graphics Mode */
case 0x23:
{
- /* Write the default font to the VGA font plane */
+ /*
+ * Write the default font to the VGA font plane
+ * and update the BIOS INT 43h vector (far pointer
+ * to the character range 00h-...)
+ */
VgaWriteFont(0, Font8x8, ARRAYSIZE(Font8x8) / VGA_FONT_CHARACTERS);
-
- /* Update the BIOS INT 43h vector */
- // Far pointer to the 8x8 characters 00h-...
((PULONG)BaseAddress)[0x43] = MAKELONG(FONT_8x8_OFFSET,
VIDEO_BIOS_DATA_SEG);
/* Update BDA */
@@ -3153,11 +3194,12 @@
/* Setup ROM 8x16 Font for Graphics Mode */
case 0x24:
{
- /* Write the default font to the VGA font plane */
+ /*
+ * Write the default font to the VGA font plane
+ * and update the BIOS INT 43h vector (far pointer
+ * to the character range 00h-...)
+ */
VgaWriteFont(0, Font8x16, ARRAYSIZE(Font8x16) /
VGA_FONT_CHARACTERS);
-
- /* Update the BIOS INT 43h vector */
- // Far pointer to the 8x16 characters 00h-...
((PULONG)BaseAddress)[0x43] = MAKELONG(FONT_8x16_OFFSET,
VIDEO_BIOS_DATA_SEG);
/* Update BDA */
@@ -3466,9 +3508,6 @@
RtlMoveMemory(SEG_OFF_TO_PTR(VIDEO_BIOS_DATA_SEG, FONT_8x14_OFFSET),
Font8x14, sizeof(Font8x14));
- /* Write the default font to the VGA font plane */
- VgaWriteFont(0, Font8x16, ARRAYSIZE(Font8x16) / VGA_FONT_CHARACTERS);
-
//
// FIXME: At the moment we always set a VGA mode. In the future,
// we should set this mode **only** when:
@@ -3480,7 +3519,7 @@
Bda->CrtModeControl = 0x00;
Bda->CrtColorPaletteMask = 0x00;
- Bda->VGADccIDActive = 0x08; // VGA w/ color analog active display
+ Bda->VGADccIDActive = 0x08; // VGA w/ color analog active display
/* Set the default video mode */
VidBiosSetVideoMode(BIOS_DEFAULT_VIDEO_MODE);