SVGA support by emulating an S3/trio 64 card with 2 mb
Support for dual CGA palette and background colors Support for attribute palette group changing Changes to work together with bios somewhat in supporting different video cards Basic support for Tandy pcjr 320x200x16 color mode Text mode support for changing font and panning support. Support for data rotate in 16 color modes. Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1063
This commit is contained in:
Sjoerd van der Berg
parent
e8892d4f61
commit
c908fa9a09
10 changed files with 1009 additions and 404 deletions
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@ -22,39 +22,53 @@
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#include <mem.h>
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#include "dosbox.h"
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#undef TEXT
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#undef GRAPH
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/* conflicts with int10.h */
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enum { TEXT, GRAPH };
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enum { GFX_256C,GFX_256U,GFX_16,GFX_4,GFX_2, TEXT_16 };
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enum VGAModes {
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M_TEXT16,
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M_CGA2,M_CGA4,
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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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/* Different functions that should be handle by memory handler */
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#define MH_ROTATEOP 0x0001;
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#define MH_SETRESET 0x0002;
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#define MH_BITMASK 0x0004;
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typedef struct {
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bool attrindex;
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Bit16u cursor;
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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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Bit16u display_start;
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Bit16u real_start;
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bool retrace; /* A retrace has started */
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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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Bitu clock;
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bool clock_half;
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bool chained; /* Enable or Disabled Chain 4 Mode */
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bool gfxmode; /* Yes or No Easy no */
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bool blinking; /* Attribute bit 7 is blinking */
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bool vga_enabled;
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bool cga_enabled;
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bool vline_double;
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Bit8u vline_height;
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@ -64,6 +78,7 @@ typedef struct {
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Bit8u bytes_skip;
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/* Specific stuff memory write/read handling */
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PhysPt mem_base;
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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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@ -91,13 +106,48 @@ typedef struct {
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bool double_width;
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bool double_height;
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Bitu lines;
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Bit8u * font;
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Bit8u font_height;
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Bit8u font[64*1024];
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Bitu rows,cols;
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struct {
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Bitu row,col,sline,eline,count;
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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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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 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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} VGA_TANDY;
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typedef struct {
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Bit8u index;
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@ -109,7 +159,6 @@ typedef struct {
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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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@ -118,9 +167,9 @@ typedef struct {
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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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@ -143,12 +192,13 @@ typedef struct {
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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_blank;
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Bit8u end_vertical_blank;
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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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@ -188,15 +238,14 @@ union VGA_Latch {
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};
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union VGA_Memory {
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Bit8u linear[64*1024*4];
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Bit8u paged[64*1024][4];
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VGA_Latch latched[64*1024];
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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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Bitu mode; /* The mode the vga system is in */
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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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@ -207,40 +256,21 @@ typedef struct {
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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_CGA cga;
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VGA_TANDY tandy;
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VGA_Memory mem;
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/* Extra buffer following main video ram with double data for overflowing of addresses */
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Bit8u buffer[1024*1024]; /* 256 kb vid ram with 16 colors and double addresses */
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} VGA_Type;
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/* Functions for different resolutions */
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//void VGA_FindSize(void);
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void VGA_FindSettings(void);
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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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/* The Different Drawing functions */
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void VGA_DrawTEXT(Bit8u * bitdata,Bitu next_line);
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void VGA_DrawGFX256U_Full(Bit8u * bitdata,Bitu next_line);
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void VGA_DrawGFX16_Fast(Bit8u * bitdata,Bitu next_line);
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void VGA_DrawGFX4_Fast(Bit8u * bitdata,Bitu next_line);
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void VGA_DrawGFX2_Fast(Bit8u * bitdata,Bitu next_line);
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/* The Different Memory Read/Write Handlers */
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Bit8u VGA_NormalReadHandler(Bit32u start);
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void VGA_GFX_256U_WriteHandler(Bit32u start,Bit8u val);
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void VGA_GFX_16_WriteHandler(Bit32u start,Bit8u val);
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void VGA_GFX_4_WriteHandler(Bit32u start,Bit8u val);
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Bit8u VGA_GFX_4_ReadHandler(Bit32u start);
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void VGA_SetupDrawing(void);
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/* Some support 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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@ -252,17 +282,15 @@ 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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extern VGA_Type vga;
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extern Bit8u vga_rom_08[256 * 8];
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extern Bit8u vga_rom_14[256 * 14];
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extern Bit8u vga_rom_16[256 * 16];
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extern Bit32u ExpandTable[256];
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extern Bit32u FillTable[16];
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extern Bit32u CGAWriteTable[256];
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extern Bit32u CGA_4_Table[256];
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extern Bit32u Expand16Table[4][16];
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extern Bit32u Expand16BigTable[0x10000];
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