subsystems/ntvdm/vga.h

   1 /*
   2  * COPYRIGHT:       GPL - See COPYING in the top level directory
   3  * PROJECT:         ReactOS Virtual DOS Machine
   4  * FILE:            vga.h
   5  * PURPOSE:         VGA hardware emulation (header file)
   6  * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
   7  */
   8
   9 #ifndef _VGA_H_
  10 #define _VGA_H_
  11
  12 /* INCLUDES *******************************************************************/
  13
  14 #include "ntvdm.h"
  15
  16 /* DEFINES ********************************************************************/
  17
  18 /* Register I/O ports */
  19 #define VGA_AC_INDEX 0x3C0
  20 #define VGA_AC_WRITE 0x3C0
  21 #define VGA_AC_READ 0x3C1
  22 #define VGA_SEQ_INDEX 0x3C4
  23 #define VGA_SEQ_DATA 0x3C5
  24 #define VGA_DAC_READ_INDEX 0x3C7
  25 #define VGA_DAC_WRITE_INDEX 0x3C8
  26 #define VGA_DAC_DATA 0x3C9
  27 #define VGA_MISC_READ 0x3CC
  28 #define VGA_MISC_WRITE 0x3C2
  29 #define VGA_CRTC_INDEX 0x3D4
  30 #define VGA_CRTC_DATA 0x3D5
  31 #define VGA_GC_INDEX 0x3CE
  32 #define VGA_GC_DATA 0x3CF
  33 #define VGA_STAT_MONO 0x3BA
  34 #define VGA_STAT_COLOR 0x3DA
  35
  36 #define VGA_NUM_BANKS 4
  37 #define VGA_BANK_SIZE 0x10000
  38 #define VGA_MAX_COLORS 256
  39 #define VGA_PALETTE_SIZE (VGA_MAX_COLORS * 3)
  40 #define VGA_BITMAP_INFO_SIZE (sizeof(BITMAPINFOHEADER) + 2 * (VGA_PALETTE_SIZE / 3))
  41 #define VGA_DAC_TO_COLOR(x) (((x) << 2) | ((x) >> 6))
  42 #define VGA_COLOR_TO_DAC(x) ((x) >> 2)
  43
  44 /* Sequencer reset register bits */
  45 #define VGA_SEQ_RESET_AR (1 << 0)
  46 #define VGA_SEQ_RESET_SR (1 << 1)
  47
  48 /* Sequencer clock register bits */
  49 #define VGA_SEQ_CLOCK_98DM (1 << 0)
  50 #define VGA_SEQ_CLOCK_SLR (1 << 2)
  51 #define VGA_SEQ_CLOCK_DCR (1 << 3)
  52 #define VGA_SEQ_CLOCK_S4 (1 << 4)
  53 #define VGA_SEQ_CLOCK_SD (1 << 5)
  54
  55 /* Sequencer memory register bits */
  56 #define VGA_SEQ_MEM_EXT (1 << 1)
  57 #define VGA_SEQ_MEM_OE (1 << 2)
  58 #define VGA_SEQ_MEM_C4 (1 << 3)
  59
  60 /* Graphics controller mode register bits */
  61 #define VGA_GC_MODE_READ (1 << 3)
  62 #define VGA_GC_MODE_OE (1 << 4)
  63 #define VGA_GC_MODE_SHIFTREG (1 << 5)
  64 #define VGA_GC_MODE_SHIFT256 (1 << 6)
  65
  66 /* Graphics controller miscellaneous register bits */
  67 #define VGA_GC_MISC_NOALPHA (1 << 0)
  68 #define VGA_GC_MISC_OE (1 << 1)
  69
  70 /* CRTC overflow register bits */
  71 #define VGA_CRTC_OVERFLOW_VT8 (1 << 0)
  72 #define VGA_CRTC_OVERFLOW_VDE8 (1 << 1)
  73 #define VGA_CRTC_OVERFLOW_VRS8 (1 << 2)
  74 #define VGA_CRTC_OVERFLOW_SVB8 (1 << 3)
  75 #define VGA_CRTC_OVERFLOW_LC8 (1 << 4)
  76 #define VGA_CRTC_OVERFLOW_VT9 (1 << 5)
  77 #define VGA_CRTC_OVERFLOW_VDE9 (1 << 6)
  78 #define VGA_CRTC_OVERFLOW_VRS9 (1 << 7)
  79
  80 /* CRTC underline register bits */
  81 #define VGA_CRTC_UNDERLINE_DWORD (1 << 6)
  82
  83 /* CRTC max scanline register bits */
  84 #define VGA_CRTC_MAXSCANLINE_DOUBLE (1 << 7)
  85
  86 /* CRTC mode control register bits */
  87 #define VGA_CRTC_MODE_CONTROL_WRAP (1 << 5)
  88 #define VGA_CRTC_MODE_CONTROL_BYTE (1 << 6)
  89 #define VGA_CRTC_MODE_CONTROL_SYNC (1 << 7)
  90
  91 /* AC control register bits */
  92 #define VGA_AC_CONTROL_ATGE (1 << 0)
  93 #define VGA_AC_CONTROL_MONO (1 << 1)
  94 #define VGA_AC_CONTROL_LGE (1 << 2)
  95 #define VGA_AC_CONTROL_BLINK (1 << 3)
  96 #define VGA_AC_CONTROL_PPM (1 << 5)
  97 #define VGA_AC_CONTROL_8BIT (1 << 6)
  98 #define VGA_AC_CONTROL_P54S (1 << 7)
  99
 100 /* Miscellaneous register bits */
 101 #define VGA_MISC_COLOR (1 << 0)
 102 #define VGA_MISC_RAM_ENABLED (1 << 1)
 103 #define VGA_MISC_OE_INVERT (1 << 5)
 104 #define VGA_MISC_HSYNCP (1 << 6)
 105 #define VGA_MISC_VSYNCP (1 << 7)
 106
 107 /* Status register flags */
 108 #define VGA_STAT_DD (1 << 0)
 109 #define VGA_STAT_VRETRACE (1 << 3)
 110
 111 enum
 112 {
 113     VGA_SEQ_RESET_REG,
 114     VGA_SEQ_CLOCK_REG,
 115     VGA_SEQ_MASK_REG,
 116     VGA_SEQ_CHAR_REG,
 117     VGA_SEQ_MEM_REG,
 118     VGA_SEQ_MAX_REG
 119 };
 120
 121 enum
 122 {
 123     VGA_GC_RESET_REG,
 124     VGA_GC_ENABLE_RESET_REG,
 125     VGA_GC_COLOR_COMPARE_REG,
 126     VGA_GC_ROTATE_REG,
 127     VGA_GC_READ_MAP_SEL_REG,
 128     VGA_GC_MODE_REG,
 129     VGA_GC_MISC_REG,
 130     VGA_GC_COLOR_IGNORE_REG,
 131     VGA_GC_BITMASK_REG,
 132     VGA_GC_MAX_REG
 133 };
 134
 135 enum
 136 {
 137     VGA_CRTC_HORZ_TOTAL_REG,
 138     VGA_CRTC_END_HORZ_DISP_REG,
 139     VGA_CRTC_START_HORZ_BLANKING_REG,
 140     VGA_CRTC_END_HORZ_BLANKING_REG,
 141     VGA_CRTC_START_HORZ_RETRACE_REG,
 142     VGA_CRTC_END_HORZ_RETRACE_REG,
 143     VGA_CRTC_VERT_TOTAL_REG,
 144     VGA_CRTC_OVERFLOW_REG,
 145     VGA_CRTC_PRESET_ROW_SCAN_REG,
 146     VGA_CRTC_MAX_SCAN_LINE_REG,
 147     VGA_CRTC_CURSOR_START_REG,
 148     VGA_CRTC_CURSOR_END_REG,
 149     VGA_CRTC_START_ADDR_HIGH_REG,
 150     VGA_CRTC_START_ADDR_LOW_REG,
 151     VGA_CRTC_CURSOR_LOC_HIGH_REG,
 152     VGA_CRTC_CURSOR_LOC_LOW_REG,
 153     VGA_CRTC_VERT_RETRACE_START_REG,
 154     VGA_CRTC_VERT_RETRACE_END_REG,
 155     VGA_CRTC_VERT_DISP_END_REG,
 156     VGA_CRTC_OFFSET_REG,
 157     VGA_CRTC_UNDERLINE_REG,
 158     VGA_CRTC_START_VERT_BLANKING_REG,
 159     VGA_CRTC_END_VERT_BLANKING,
 160     VGA_CRTC_MODE_CONTROL_REG,
 161     VGA_CRTC_LINE_COMPARE_REG,
 162     VGA_CRTC_MAX_REG
 163 };
 164
 165 enum
 166 {
 167     VGA_AC_PAL_0_REG,
 168     VGA_AC_PAL_1_REG,
 169     VGA_AC_PAL_2_REG,
 170     VGA_AC_PAL_3_REG,
 171     VGA_AC_PAL_4_REG,
 172     VGA_AC_PAL_5_REG,
 173     VGA_AC_PAL_6_REG,
 174     VGA_AC_PAL_7_REG,
 175     VGA_AC_PAL_8_REG,
 176     VGA_AC_PAL_9_REG,
 177     VGA_AC_PAL_A_REG,
 178     VGA_AC_PAL_B_REG,
 179     VGA_AC_PAL_C_REG,
 180     VGA_AC_PAL_D_REG,
 181     VGA_AC_PAL_E_REG,
 182     VGA_AC_PAL_F_REG,
 183     VGA_AC_CONTROL_REG,
 184     VGA_AC_OVERSCAN_REG,
 185     VGA_AC_COLOR_PLANE_REG,
 186     VGA_AC_HORZ_PANNING_REG,
 187     VGA_AC_COLOR_SEL_REG,
 188     VGA_AC_MAX_REG
 189 };
 190
 191 /* FUNCTIONS ******************************************************************/
 192
 193 DWORD VgaGetVideoBaseAddress(VOID);
 194 DWORD VgaGetVideoLimitAddress(VOID);
 195 COORD VgaGetDisplayResolution(VOID);
 196 VOID VgaRefreshDisplay(VOID);
 197 VOID VgaHorizontalRetrace(VOID);
 198 VOID VgaReadMemory(DWORD Address, LPBYTE Buffer, DWORD Size);
 199 VOID VgaWriteMemory(DWORD Address, LPBYTE Buffer, DWORD Size);
 200 BYTE VgaReadPort(WORD Port);
 201 VOID VgaWritePort(WORD Port, BYTE Data);
 202 VOID VgaClearMemory(VOID);
 203 BOOLEAN VgaInitialize(HANDLE TextHandle);
 204
 205 #endif // _VGA_H_
 206
 207 /* EOF */