valter/dosbox-staging
1
0
Fork 0
Code Releases Activity
dosbox-staging/include/vga.h
Ralf Grillenberger 8912e7ab6f -CGA, PCJr, Tandy: Add video blanking, change display start latch timing, sync pulse width correction, 
-PCJr, Tandy: implement vertical retrace interrupt,
-PCJr, CGA: do line-by-line video emulation,
-PCJr: support on-screen change of color modes 4medium to 16low (used by Ghostbusters booter),
-All machines: only update the video timing when needed (Jungle Hunt, others that synchronize to the video screen might profit), only resize the output window when needed, start up the video more quickly at the beginning.

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3572
2010-04-04 22:39:06 +00:00

522 lines
12 KiB
C++
Raw Blame History

/*
* Copyright (C) 2002-2010 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 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.
*/
/* $Id: vga.h,v 1.48 2009-11-03 21:06:59 h-a-l-9000 Exp $ */
#ifndef DOSBOX_VGA_H
#define DOSBOX_VGA_H
#ifndef DOSBOX_DOSBOX_H
#include "dosbox.h"
#endif
//Don't enable keeping changes and mapping lfb probably...
#define VGA_LFB_MAPPED
//#define VGA_KEEP_CHANGES
#define VGA_CHANGE_SHIFT 9
class PageHandler;
enum VGAModes {
M_CGA2, M_CGA4,
M_EGA, M_VGA,
M_LIN4, M_LIN8, M_LIN15, M_LIN16, M_LIN32,
M_TEXT,
M_HERC_GFX, M_HERC_TEXT,
M_CGA16, M_TANDY2, M_TANDY4, M_TANDY16, M_TANDY_TEXT,
M_ERROR
};
#define CLK_25 25175
#define CLK_28 28322
#define MIN_VCO 180000
#define MAX_VCO 360000
#define S3_CLOCK_REF 14318 /* KHz */
#define S3_CLOCK(_M,_N,_R) ((S3_CLOCK_REF * ((_M) + 2)) / (((_N) + 2) * (1 << (_R))))
#define S3_MAX_CLOCK 150000 /* KHz */
#define S3_XGA_1024 0x00
#define S3_XGA_1152 0x01
#define S3_XGA_640 0x40
#define S3_XGA_800 0x80
#define S3_XGA_1280 0xc0
#define S3_XGA_WMASK (S3_XGA_640|S3_XGA_800|S3_XGA_1024|S3_XGA_1152|S3_XGA_1280)
#define S3_XGA_8BPP 0x00
#define S3_XGA_16BPP 0x10
#define S3_XGA_32BPP 0x30
#define S3_XGA_CMASK (S3_XGA_8BPP|S3_XGA_16BPP|S3_XGA_32BPP)
typedef struct {
bool attrindex;
} VGA_Internal;
typedef struct {
/* Memory handlers */
Bitu mh_mask;
/* Video drawing */
Bitu display_start;
Bitu real_start;
bool retrace; /* A retrace is active */
Bitu scan_len;
Bitu cursor_start;
/* Some other screen related variables */
Bitu line_compare;
bool chained; /* Enable or Disabled Chain 4 Mode */
bool compatible_chain4;
/* Pixel Scrolling */
Bit8u pel_panning; /* Amount of pixels to skip when starting horizontal line */
Bit8u hlines_skip;
Bit8u bytes_skip;
Bit8u addr_shift;
/* 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;
Bit32u full_bit_mask;
Bit32u full_map_mask;
Bit32u full_not_map_mask;
Bit32u full_set_reset;
Bit32u full_not_enable_set_reset;
Bit32u full_enable_set_reset;
Bit32u full_enable_and_set_reset;
} VGA_Config;
typedef enum {
PART,
LINE,
//EGALINE
} Drawmode;
typedef struct {
bool resizing;
Bitu width;
Bitu height;
Bitu blocks;
Bitu address;
Bitu panning;
Bitu bytes_skip;
Bit8u *linear_base;
Bitu linear_mask;
Bitu address_add;
Bitu line_length;
Bitu address_line_total;
Bitu address_line;
Bitu lines_total;
Bitu vblank_skip;
Bitu lines_done;
Bitu lines_scaled;
Bitu split_line;
Bitu parts_total;
Bitu parts_lines;
Bitu parts_left;
Bitu byte_panning_shift;
struct {
double framestart;
double vrstart, vrend; // V-retrace
double hrstart, hrend; // H-retrace
double hblkstart, hblkend; // H-blanking
double vblkstart, vblkend; // V-Blanking
double vdend, vtotal;
double hdend, htotal;
double parts;
} delay;
Bitu bpp;
double aspect_ratio;
bool double_scan;
bool doublewidth,doubleheight;
Bit8u font[64*1024];
Bit8u * font_tables[2];
Bitu blinking;
struct {
Bitu address;
Bit8u sline,eline;
Bit8u count,delay;
Bit8u enabled;
} cursor;
Drawmode mode;
bool vret_triggered;
} VGA_Draw;
typedef struct {
Bit8u curmode;
Bit16u originx, originy;
Bit8u fstackpos, bstackpos;
Bit8u forestack[3];
Bit8u backstack[3];
Bit16u startaddr;
Bit8u posx, posy;
Bit8u mc[64][64];
} VGA_HWCURSOR;
typedef struct {
Bit8u reg_lock1;
Bit8u reg_lock2;
Bit8u reg_31;
Bit8u reg_35;
Bit8u reg_36; // RAM size
Bit8u reg_3a; // 4/8/doublepixel bit in there
Bit8u reg_40; // 8415/A functionality register
Bit8u reg_41; // BIOS flags
Bit8u reg_43;
Bit8u reg_45; // Hardware graphics cursor
Bit8u reg_50;
Bit8u reg_51;
Bit8u reg_52;
Bit8u reg_55;
Bit8u reg_58;
Bit8u reg_6b; // LFB BIOS scratchpad
Bit8u ex_hor_overflow;
Bit8u ex_ver_overflow;
Bit16u la_window;
Bit8u misc_control_2;
Bit8u ext_mem_ctrl;
Bitu xga_screen_width;
VGAModes xga_color_mode;
struct {
Bit8u r;
Bit8u n;
Bit8u m;
} clk[4],mclk;
struct {
Bit8u lock;
Bit8u cmd;
} pll;
VGA_HWCURSOR hgc;
} VGA_S3;
typedef struct {
Bit8u mode_control;
Bit8u enable_bits;
} VGA_HERC;
typedef struct {
Bit8u index;
Bit8u htotal;
Bit8u hdend;
Bit8u hsyncp;
Bit8u hsyncw;
Bit8u vtotal;
Bit8u vdend;
Bit8u vadjust;
Bit8u vsyncp;
Bit8u vsyncw;
Bit8u max_scanline;
Bit16u lightpen;
bool lightpen_triggered;
Bit8u cursor_start;
Bit8u cursor_end;
} VGA_OTHER;
typedef struct {
Bit8u pcjr_flipflop;
Bit8u mode_control;
Bit8u color_select;
Bit8u disp_bank;
Bit8u reg_index;
Bit8u gfx_control;
Bit8u palette_mask;
Bit8u extended_ram;
Bit8u border_color;
Bit8u line_mask, line_shift;
Bit8u draw_bank, mem_bank;
Bit8u *draw_base, *mem_base;
Bitu addr_mask;
} VGA_TANDY;
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;
Bit8u disabled; // Used for disabling the screen.
// Bit0: screen disabled by attribute controller index
// Bit1: screen disabled by sequencer index 1 bit 5
// These are put together in one variable for performance reasons:
// the line drawing function is called maybe 60*480=28800 times/s,
// and we only need to check one variable for zero this way.
} 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_blanking;
Bit8u end_vertical_blanking;
Bit8u mode_control;
Bit8u line_compare;
Bit8u index;
bool read_only;
} 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;
typedef struct {
Bit8u red;
Bit8u green;
Bit8u blue;
} RGBEntry;
typedef struct {
Bit8u bits; /* DAC bits, usually 6 or 8 */
Bit8u pel_mask;
Bit8u pel_index;
Bit8u state;
Bit8u write_index;
Bit8u read_index;
Bitu first_changed;
Bit8u combine[16];
RGBEntry rgb[0x100];
Bit16u xlat16[256];
} VGA_Dac;
typedef struct {
Bitu readStart, writeStart;
Bitu bankMask;
Bitu bank_read_full;
Bitu bank_write_full;
Bit8u bank_read;
Bit8u bank_write;
Bitu bank_size;
} VGA_SVGA;
typedef union {
Bit32u d;
Bit8u b[4];
} VGA_Latch;
typedef struct {
Bit8u* linear;
Bit8u* linear_orgptr;
} VGA_Memory;
typedef struct {
//Add a few more just to be safe
Bit8u* map; /* allocated dynamically: [(VGA_MEMORY >> VGA_CHANGE_SHIFT) + 32] */
Bit8u checkMask, frame, writeMask;
bool active;
Bit32u clearMask;
Bit32u start, last;
Bit32u lastAddress;
} VGA_Changes;
typedef struct {
Bit32u page;
Bit32u addr;
Bit32u mask;
PageHandler *handler;
} VGA_LFB;
typedef struct {
VGAModes mode; /* The mode the vga system is in */
Bit8u misc_output;
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_S3 s3;
VGA_SVGA svga;
VGA_HERC herc;
VGA_TANDY tandy;
VGA_OTHER other;
VGA_Memory mem;
Bit32u vmemwrap; /* this is assumed to be power of 2 */
Bit8u* fastmem; /* memory for fast (usually 16-color) rendering, always twice as big as vmemsize */
Bit8u* fastmem_orgptr;
Bit32u vmemsize;
#ifdef VGA_KEEP_CHANGES
VGA_Changes changes;
#endif
VGA_LFB lfb;
} VGA_Type;
/* Functions for different resolutions */
void VGA_SetMode(VGAModes mode);
void VGA_DetermineMode(void);
void VGA_SetupHandlers(void);
void VGA_StartResize(Bitu delay=50);
void VGA_SetupDrawing(Bitu val);
void VGA_CheckScanLength(void);
void VGA_ChangedBank(void);
/* Some DAC/Attribute functions */
void VGA_DAC_CombineColor(Bit8u attr,Bit8u pal);
void VGA_DAC_SetEntry(Bitu entry,Bit8u red,Bit8u green,Bit8u blue);
void VGA_ATTR_SetPalette(Bit8u index,Bit8u val);
/* The VGA Subfunction startups */
void VGA_SetupAttr(void);
void VGA_SetupMemory(Section* sec);
void VGA_SetupDAC(void);
void VGA_SetupCRTC(void);
void VGA_SetupMisc(void);
void VGA_SetupGFX(void);
void VGA_SetupSEQ(void);
void VGA_SetupOther(void);
void VGA_SetupXGA(void);
/* Some Support Functions */
void VGA_SetClock(Bitu which,Bitu target);
void VGA_DACSetEntirePalette(void);
void VGA_StartRetrace(void);
void VGA_StartUpdateLFB(void);
void VGA_SetBlinking(Bitu enabled);
void VGA_SetCGA2Table(Bit8u val0,Bit8u val1);
void VGA_SetCGA4Table(Bit8u val0,Bit8u val1,Bit8u val2,Bit8u val3);
void VGA_ActivateHardwareCursor(void);
void VGA_KillDrawing(void);
extern VGA_Type vga;
/* Support for modular SVGA implementation */
/* Video mode extra data to be passed to FinishSetMode_SVGA().
This structure will be in flux until all drivers (including S3)
are properly separated. Right now it contains only three overflow
fields in S3 format and relies on drivers re-interpreting those.
For reference:
ver_overflow:X|line_comp10|X|vretrace10|X|vbstart10|vdispend10|vtotal10
hor_overflow:X|X|X|hretrace8|X|hblank8|hdispend8|htotal8
offset is not currently used by drivers (useful only for S3 itself)
It also contains basic int10 mode data - number, vtotal, htotal
*/
typedef struct {
Bit8u ver_overflow;
Bit8u hor_overflow;
Bitu offset;
Bitu modeNo;
Bitu htotal;
Bitu vtotal;
} VGA_ModeExtraData;
// Vector function prototypes
typedef void (*tWritePort)(Bitu reg,Bitu val,Bitu iolen);
typedef Bitu (*tReadPort)(Bitu reg,Bitu iolen);
typedef void (*tFinishSetMode)(Bitu crtc_base, VGA_ModeExtraData* modeData);
typedef void (*tDetermineMode)();
typedef void (*tSetClock)(Bitu which,Bitu target);
typedef Bitu (*tGetClock)();
typedef bool (*tHWCursorActive)();
typedef bool (*tAcceptsMode)(Bitu modeNo);
struct SVGA_Driver {
tWritePort write_p3d5;
tReadPort read_p3d5;
tWritePort write_p3c5;
tReadPort read_p3c5;
tWritePort write_p3c0;
tReadPort read_p3c1;
tWritePort write_p3cf;
tReadPort read_p3cf;
tFinishSetMode set_video_mode;
tDetermineMode determine_mode;
tSetClock set_clock;
tGetClock get_clock;
tHWCursorActive hardware_cursor_active;
tAcceptsMode accepts_mode;
};
extern SVGA_Driver svga;
void SVGA_Setup_S3Trio(void);
void SVGA_Setup_TsengET4K(void);
void SVGA_Setup_TsengET3K(void);
void SVGA_Setup_ParadisePVGA1A(void);
void SVGA_Setup_Driver(void);
// Amount of video memory required for a mode, implemented in int10_modes.cpp
Bitu VideoModeMemSize(Bitu mode);
extern Bit32u ExpandTable[256];
extern Bit32u FillTable[16];
extern Bit32u CGA_2_Table[16];
extern Bit32u CGA_4_Table[256];
extern Bit32u CGA_4_HiRes_Table[256];
extern Bit32u CGA_16_Table[256];
extern Bit32u TXT_Font_Table[16];
extern Bit32u TXT_FG_Table[16];
extern Bit32u TXT_BG_Table[16];
extern Bit32u Expand16Table[4][16];
extern Bit32u Expand16BigTable[0x10000];
#endif
View git blame Copy permalink