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First CVS upload.

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@80
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Sjoerd van der Berg 2002-07-27 13:08:48 +00:00
parent 7d1ca9bdd4
commit 42e5d0b779
158 changed files with 42940 additions and 0 deletions
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src/hardware/vga.h Normal file
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/*
* Copyright (C) 2002 The DOSBox Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef VGA_H_
#define VGA_H_
#include <mem.h>
enum { TEXT, GRAPH };
enum { GFX_256C,GFX_256U,GFX_16,GFX_4,GFX_2, TEXT_16 };
typedef struct {
bool attrindex;
} VGA_Internal;
typedef struct {
/* Video drawing */
Bit16u display_start;
Bit16u real_start;
bool retrace; /* A retrace has started */
Bitu scan_len;
/* Screen resolution and memory mode */
Bitu vdisplayend;
Bitu hdisplayend;
bool chained; /* Enable or Disabled Chain 4 Mode */
bool gfxmode; /* Yes or No Easy no */
bool blinking; /* Attribute bit 7 is blinking */
bool vga_enabled;
bool cga_enabled;
bool vline_double;
Bit8u vline_height;
/* Pixel Scrolling */
Bit8u pel_panning; /* Amount of pixels to skip when starting horizontal line */
Bit8u hlines_skip;
Bit8u bytes_skip;
/* Specific stuff memory write/read handling */
Bit8u read_mode;
Bit8u write_mode;
Bit8u read_map_select;
Bit8u color_dont_care;
Bit8u color_compare;
Bit8u data_rotate;
Bit8u raster_op;
Bit8u enable_set_reset;
Bit8u set_reset;
Bit32u full_bit_mask;
Bit32u full_map_mask;
} VGA_Config;
typedef struct {
bool resizing;
Bitu width;
Bitu height;
Bit8u font_height;
Bit8u cursor_enable;
Bit8u cursor_row;
Bit8u cursor_col;
Bit8u cursor_count;
} VGA_Draw;
typedef struct {
Bit8u index;
Bit8u reset;
Bit8u clocking_mode;
Bit8u map_mask;
Bit8u character_map_select;
Bit8u memory_mode;
} VGA_Seq;
typedef struct {
Bit8u palette[16];
Bit8u mode_control;
Bit8u horizontal_pel_panning;
Bit8u overscan_color;
Bit8u color_plane_enable;
Bit8u color_select;
Bit8u index;
} VGA_Attr;
typedef struct {
Bit8u horizontal_total;
Bit8u horizontal_display_end;
Bit8u start_horizontal_blanking;
Bit8u end_horizontal_blanking;
Bit8u start_horizontal_retrace;
Bit8u end_horizontal_retrace;
Bit8u vertical_total;
Bit8u overflow;
Bit8u preset_row_scan;
Bit8u maximum_scan_line;
Bit8u cursor_start;
Bit8u cursor_end;
Bit8u start_address_high;
Bit8u start_address_low;
Bit8u cursor_location_high;
Bit8u cursor_location_low;
Bit8u vertical_retrace_start;
Bit8u vertical_retrace_end;
Bit8u vertical_display_end;
Bit8u offset;
Bit8u underline_location;
Bit8u start_vertical_blank;
Bit8u end_vertical_blank;
Bit8u mode_control;
Bit8u line_compare;
Bit8u index;
} VGA_Crtc;
typedef struct {
Bit8u index;
Bit8u set_reset;
Bit8u enable_set_reset;
Bit8u color_compare;
Bit8u data_rotate;
Bit8u read_map_select;
Bit8u mode;
Bit8u miscellaneous;
Bit8u color_dont_care;
Bit8u bit_mask;
} VGA_Gfx;
struct RGBEntry {
Bit8u red;
Bit8u green;
Bit8u blue;
Bit8u attr_entry;
};
typedef struct {
Bit8u bits; /* DAC bits, usually 6 or 8 */
Bit8u pel_mask;
Bit8u pel_index;
Bit8u state;
Bit8u index;
Bitu first_changed;
RGBEntry rgb[0x100];
} VGA_Dac;
union VGA_Latch {
Bit32u d;
Bit8u b[4];
};
union VGA_Memory {
Bit8u linear[64*1024*4];
Bit8u paged[64*1024][4];
VGA_Latch latched[64*1024];
};
typedef struct {
Bitu mode; /* The mode the vga system is in */
VGA_Draw draw;
VGA_Config config;
VGA_Internal internal;
/* Internal module groups */
VGA_Seq seq;
VGA_Attr attr;
VGA_Crtc crtc;
VGA_Gfx gfx;
VGA_Dac dac;
VGA_Latch latch;
VGA_Memory mem;
//Special little hack to let the memory run over into the buffer
Bit8u buffer[1024*1024];
} VGA_Type;
/* Functions for different resolutions */
//void VGA_FindSize(void);
void VGA_FindSettings(void);
void VGA_StartResize(void);
/* The Different Drawing functions */
void VGA_DrawTEXT(Bit8u * bitdata,Bitu next_line);
void VGA_DrawGFX256_Fast(Bit8u * bitdata,Bitu next_line);
void VGA_DrawGFX256_Full(Bit8u * bitdata,Bitu next_line);
void VGA_DrawGFX16_Full(Bit8u * bitdata,Bitu next_line);
void VGA_DrawGFX4_Full(Bit8u * bitdata,Bitu next_line);
/* The Different Memory Read/Write Handlers */
Bit8u VGA_NormalReadHandler(Bit32u start);
void VGA_NormalWriteHandler(Bit32u start,Bit8u val);
void VGA_GFX_256U_WriteHandler(Bit32u start,Bit8u val);
void VGA_GFX_16_WriteHandler(Bit32u start,Bit8u val);
void VGA_GFX_4_WriteHandler(Bit32u start,Bit8u val);
Bit8u VGA_ChainedReadHandler(Bit32u start);
void VGA_ChainedWriteHandler(Bit32u start,Bit8u val);
Bit8u VGA_GFX_4_ReadHandler(Bit32u start);
/* Some support functions */
void VGA_DAC_CombineColor(Bit8u attr,Bit8u pal);
/* The VGA Subfunction startups */
void VGA_SetupAttr(void);
void VGA_SetupMemory(void);
void VGA_SetupDAC(void);
void VGA_SetupCRTC(void);
void VGA_SetupMisc(void);
void VGA_SetupGFX(void);
void VGA_SetupSEQ(void);
/* Some Support Functions */
void VGA_DACSetEntirePalette(void);
extern VGA_Type vga;
extern Bit8u vga_rom_8[256 * 8];
extern Bit8u vga_rom_14[256 * 14];
extern Bit8u vga_rom_16[256 * 16];
//extern Bit8u vga_buffer[1024*1024];
extern Bit32u ExpandTable[256];
extern Bit32u FillTable[16];
extern Bit32u CGAWriteTable[256];
#endif