mirror of
https://github.com/retro100/dosbox-wii.git
synced 2024-06-30 16:16:09 +02:00
337 lines
6.6 KiB
C
337 lines
6.6 KiB
C
/*
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* Copyright (C) 2002-2004 The DOSBox Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef VGA_H_
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#define VGA_H_
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#include <mem.h>
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#include "dosbox.h"
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enum VGAModes {
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M_TEXT2,M_TEXT16,
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M_HERC,
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M_CGA2,M_CGA4,M_CGA16,
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M_TANDY16,
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M_EGA2,M_EGA4,M_EGA16,
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M_VGA,
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M_LIN8,
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M_ERROR,
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};
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#define CLK_25 25175
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#define CLK_28 28322
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#define MIN_VCO 180000
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#define MAX_VCO 360000
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#define S3_CLOCK_REF 14318 /* KHz */
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#define S3_CLOCK(_M,_N,_R) ((S3_CLOCK_REF * ((_M) + 2)) / (((_N) + 2) * (1 << (_R))))
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#define S3_MAX_CLOCK 150000 /* KHz */
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typedef struct {
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bool attrindex;
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} VGA_Internal;
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typedef struct {
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/* Memory handlers */
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Bitu mh_mask;
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/* Video drawing */
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Bitu display_start;
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Bitu real_start;
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bool retrace; /* A retrace is active */
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Bitu scan_len;
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Bitu cursor_start;
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/* Some other screen related variables */
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Bitu line_compare;
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bool chained; /* Enable or Disabled Chain 4 Mode */
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bool blinking; /* Attribute bit 7 is blinking */
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/* Pixel Scrolling */
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Bit8u pel_panning; /* Amount of pixels to skip when starting horizontal line */
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Bit8u hlines_skip;
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Bit8u bytes_skip;
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/* Specific stuff memory write/read handling */
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Bit8u read_mode;
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Bit8u write_mode;
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Bit8u read_map_select;
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Bit8u color_dont_care;
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Bit8u color_compare;
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Bit8u data_rotate;
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Bit8u raster_op;
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Bit32u full_bit_mask;
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Bit32u full_map_mask;
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Bit32u full_not_map_mask;
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Bit32u full_set_reset;
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Bit32u full_not_enable_set_reset;
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Bit32u full_enable_set_reset;
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Bit32u full_enable_and_set_reset;
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} VGA_Config;
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typedef struct {
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bool resizing;
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bool drawing;
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Bitu width;
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Bitu height;
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Bitu pitch;
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Bitu blocks;
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Bitu panning;
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Bitu address;
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Bitu address_add;
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Bitu address_line_total;
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Bitu address_line;
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Bitu lines_total;
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Bitu lines_left;
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Bitu lines_scaled;
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Bitu split_line;
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Bitu parts_total;
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Bitu parts_lines;
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Bitu parts_left;
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struct {
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Bitu vtotal;
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Bitu vstart;
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Bitu vend;
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Bitu htotal;
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Bitu hstart;
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Bitu hend;
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Bitu parts;
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} micro;
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Bitu scaleh;
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bool double_scan;
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bool double_scan_active;
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Bit8u font_height;
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Bit8u font[64*1024];
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Bitu font1_start;
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Bitu font2_start;
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Bitu blinking;
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struct {
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Bit8u sline,eline;
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Bit8u count,delay;
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Bit8u enabled;
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} cursor;
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} VGA_Draw;
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typedef struct {
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Bit8u bank;
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Bit8u reg_lock1;
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Bit8u reg_lock2;
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Bit8u reg_31;
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Bit8u reg_35;
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Bit8u reg_43;
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Bit8u reg_58;
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Bit8u reg_51;
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Bit8u reg_55;
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Bit8u ex_hor_overflow;
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Bit8u ex_ver_overflow;
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Bit16u la_window;
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struct {
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Bit8u r;
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Bit8u n;
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Bit8u m;
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} clk[4],mclk;
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struct {
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Bit8u lock;
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Bit8u cmd;
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} pll;
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} VGA_S3;
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typedef struct {
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Bit8u mode_control;
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Bit8u enable_bits;
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} VGA_HERC;
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typedef struct {
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Bit8u mode_control;
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Bit8u color_select;
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} VGA_CGA;
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typedef struct {
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Bit8u mem_bank;
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Bit8u disp_bank;
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Bit8u reg_index;
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Bit8u mode_control1;
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Bit8u palette_mask;
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Bit8u border_color;
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Bit8u mode_control2;
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} VGA_TANDY;
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typedef struct {
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Bit8u index;
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Bit8u reset;
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Bit8u clocking_mode;
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Bit8u map_mask;
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Bit8u character_map_select;
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Bit8u memory_mode;
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} VGA_Seq;
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typedef struct {
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Bit8u palette[16];
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Bit8u mode_control;
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Bit8u horizontal_pel_panning;
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Bit8u overscan_color;
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Bit8u color_plane_enable;
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Bit8u color_select;
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Bit8u index;
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Bit8u enabled;
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} VGA_Attr;
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typedef struct {
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Bit8u horizontal_total;
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Bit8u horizontal_display_end;
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Bit8u start_horizontal_blanking;
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Bit8u end_horizontal_blanking;
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Bit8u start_horizontal_retrace;
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Bit8u end_horizontal_retrace;
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Bit8u vertical_total;
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Bit8u overflow;
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Bit8u preset_row_scan;
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Bit8u maximum_scan_line;
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Bit8u cursor_start;
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Bit8u cursor_end;
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Bit8u start_address_high;
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Bit8u start_address_low;
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Bit8u cursor_location_high;
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Bit8u cursor_location_low;
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Bit8u vertical_retrace_start;
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Bit8u vertical_retrace_end;
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Bit8u vertical_display_end;
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Bit8u offset;
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Bit8u underline_location;
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Bit8u start_vertical_blanking;
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Bit8u end_vertical_blanking;
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Bit8u mode_control;
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Bit8u line_compare;
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Bit8u index;
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bool read_only;
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} VGA_Crtc;
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typedef struct {
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Bit8u index;
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Bit8u set_reset;
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Bit8u enable_set_reset;
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Bit8u color_compare;
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Bit8u data_rotate;
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Bit8u read_map_select;
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Bit8u mode;
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Bit8u miscellaneous;
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Bit8u color_dont_care;
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Bit8u bit_mask;
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} VGA_Gfx;
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struct RGBEntry {
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Bit8u red;
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Bit8u green;
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Bit8u blue;
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};
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typedef struct {
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Bit8u bits; /* DAC bits, usually 6 or 8 */
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Bit8u pel_mask;
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Bit8u pel_index;
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Bit8u state;
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Bit8u write_index;
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Bit8u read_index;
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Bitu first_changed;
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RGBEntry rgb[0x100];
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Bit8u attr[16];
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} VGA_Dac;
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union VGA_Latch {
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Bit32u d;
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Bit8u b[4];
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};
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union VGA_Memory {
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Bit8u linear[512*1024*4];
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Bit8u paged[512*1024][4];
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VGA_Latch latched[512*1024];
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};
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typedef struct {
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VGAModes mode; /* The mode the vga system is in */
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Bit8u misc_output;
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VGA_Draw draw;
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VGA_Config config;
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VGA_Internal internal;
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/* Internal module groups */
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VGA_Seq seq;
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VGA_Attr attr;
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VGA_Crtc crtc;
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VGA_Gfx gfx;
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VGA_Dac dac;
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VGA_Latch latch;
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VGA_S3 s3;
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VGA_HERC herc;
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VGA_CGA cga;
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VGA_TANDY tandy;
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VGA_Memory mem;
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} VGA_Type;
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/* Functions for different resolutions */
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void VGA_SetMode(VGAModes mode);
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void VGA_SetupHandlers(void);
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void VGA_StartResize(void);
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void VGA_SetupDrawing(void);
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/* Some DAC/Attribute functions */
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void VGA_DAC_CombineColor(Bit8u attr,Bit8u pal);
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void VGA_ATTR_SetPalette(Bit8u index,Bit8u val);
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/* The VGA Subfunction startups */
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void VGA_SetupAttr(void);
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void VGA_SetupMemory(void);
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void VGA_SetupDAC(void);
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void VGA_SetupCRTC(void);
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void VGA_SetupMisc(void);
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void VGA_SetupGFX(void);
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void VGA_SetupSEQ(void);
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/* Some Support Functions */
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void VGA_SetClock(Bitu which,Bitu target);
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void VGA_DACSetEntirePalette(void);
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void VGA_StartRetrace(void);
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void VGA_StartUpdateLFB(void);
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void VGA_SetBlinking(Bitu enabled);
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extern VGA_Type vga;
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extern Bit32u ExpandTable[256];
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extern Bit32u FillTable[16];
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extern Bit32u CGA_2_Table[16];
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extern Bit32u CGA_4_Table[256];
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extern Bit32u CGA_16_Table[256];
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extern Bit32u TXT_Font_Table[16];
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extern Bit32u TXT_FG_Table[16];
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extern Bit32u TXT_BG_Table[16];
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extern Bit32u Expand16Table[4][16];
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extern Bit32u Expand16BigTable[0x10000];
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#endif
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