2 * COPYRIGHT: GPL - See COPYING in the top level directory
3 * PROJECT: ReactOS Virtual DOS Machine
5 * PURPOSE: VGA hardware emulation (header file)
6 * PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
12 /* INCLUDES *******************************************************************/
16 /* DEFINES ********************************************************************/
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
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_MINIMUM_WIDTH 400
42 #define VGA_MINIMUM_HEIGHT 300
43 #define VGA_DAC_TO_COLOR(x) (((x) << 2) | ((x) >> 6))
44 #define VGA_COLOR_TO_DAC(x) ((x) >> 2)
46 /* Sequencer reset register bits */
47 #define VGA_SEQ_RESET_AR (1 << 0)
48 #define VGA_SEQ_RESET_SR (1 << 1)
50 /* Sequencer clock register bits */
51 #define VGA_SEQ_CLOCK_98DM (1 << 0)
52 #define VGA_SEQ_CLOCK_SLR (1 << 2)
53 #define VGA_SEQ_CLOCK_DCR (1 << 3)
54 #define VGA_SEQ_CLOCK_S4 (1 << 4)
55 #define VGA_SEQ_CLOCK_SD (1 << 5)
57 /* Sequencer memory register bits */
58 #define VGA_SEQ_MEM_EXT (1 << 1)
59 #define VGA_SEQ_MEM_OE (1 << 2)
60 #define VGA_SEQ_MEM_C4 (1 << 3)
62 /* Graphics controller mode register bits */
63 #define VGA_GC_MODE_READ (1 << 3)
64 #define VGA_GC_MODE_OE (1 << 4)
65 #define VGA_GC_MODE_SHIFTREG (1 << 5)
66 #define VGA_GC_MODE_SHIFT256 (1 << 6)
68 /* Graphics controller miscellaneous register bits */
69 #define VGA_GC_MISC_NOALPHA (1 << 0)
70 #define VGA_GC_MISC_OE (1 << 1)
72 /* CRTC overflow register bits */
73 #define VGA_CRTC_OVERFLOW_VT8 (1 << 0)
74 #define VGA_CRTC_OVERFLOW_VDE8 (1 << 1)
75 #define VGA_CRTC_OVERFLOW_VRS8 (1 << 2)
76 #define VGA_CRTC_OVERFLOW_SVB8 (1 << 3)
77 #define VGA_CRTC_OVERFLOW_LC8 (1 << 4)
78 #define VGA_CRTC_OVERFLOW_VT9 (1 << 5)
79 #define VGA_CRTC_OVERFLOW_VDE9 (1 << 6)
80 #define VGA_CRTC_OVERFLOW_VRS9 (1 << 7)
82 /* CRTC underline register bits */
83 #define VGA_CRTC_UNDERLINE_DWORD (1 << 6)
85 /* CRTC max scanline register bits */
86 #define VGA_CRTC_MAXSCANLINE_DOUBLE (1 << 7)
88 /* CRTC mode control register bits */
89 #define VGA_CRTC_MODE_CONTROL_WRAP (1 << 5)
90 #define VGA_CRTC_MODE_CONTROL_BYTE (1 << 6)
91 #define VGA_CRTC_MODE_CONTROL_SYNC (1 << 7)
93 /* AC control register bits */
94 #define VGA_AC_CONTROL_ATGE (1 << 0)
95 #define VGA_AC_CONTROL_MONO (1 << 1)
96 #define VGA_AC_CONTROL_LGE (1 << 2)
97 #define VGA_AC_CONTROL_BLINK (1 << 3)
98 #define VGA_AC_CONTROL_PPM (1 << 5)
99 #define VGA_AC_CONTROL_8BIT (1 << 6)
100 #define VGA_AC_CONTROL_P54S (1 << 7)
102 /* Miscellaneous register bits */
103 #define VGA_MISC_COLOR (1 << 0)
104 #define VGA_MISC_RAM_ENABLED (1 << 1)
105 #define VGA_MISC_OE_INVERT (1 << 5)
106 #define VGA_MISC_HSYNCP (1 << 6)
107 #define VGA_MISC_VSYNCP (1 << 7)
109 /* Status register flags */
110 #define VGA_STAT_DD (1 << 0)
111 #define VGA_STAT_VRETRACE (1 << 3)
126 VGA_GC_ENABLE_RESET_REG
,
127 VGA_GC_COLOR_COMPARE_REG
,
129 VGA_GC_READ_MAP_SEL_REG
,
132 VGA_GC_COLOR_IGNORE_REG
,
139 VGA_CRTC_HORZ_TOTAL_REG
,
140 VGA_CRTC_END_HORZ_DISP_REG
,
141 VGA_CRTC_START_HORZ_BLANKING_REG
,
142 VGA_CRTC_END_HORZ_BLANKING_REG
,
143 VGA_CRTC_START_HORZ_RETRACE_REG
,
144 VGA_CRTC_END_HORZ_RETRACE_REG
,
145 VGA_CRTC_VERT_TOTAL_REG
,
146 VGA_CRTC_OVERFLOW_REG
,
147 VGA_CRTC_PRESET_ROW_SCAN_REG
,
148 VGA_CRTC_MAX_SCAN_LINE_REG
,
149 VGA_CRTC_CURSOR_START_REG
,
150 VGA_CRTC_CURSOR_END_REG
,
151 VGA_CRTC_START_ADDR_HIGH_REG
,
152 VGA_CRTC_START_ADDR_LOW_REG
,
153 VGA_CRTC_CURSOR_LOC_HIGH_REG
,
154 VGA_CRTC_CURSOR_LOC_LOW_REG
,
155 VGA_CRTC_VERT_RETRACE_START_REG
,
156 VGA_CRTC_VERT_RETRACE_END_REG
,
157 VGA_CRTC_VERT_DISP_END_REG
,
159 VGA_CRTC_UNDERLINE_REG
,
160 VGA_CRTC_START_VERT_BLANKING_REG
,
161 VGA_CRTC_END_VERT_BLANKING
,
162 VGA_CRTC_MODE_CONTROL_REG
,
163 VGA_CRTC_LINE_COMPARE_REG
,
187 VGA_AC_COLOR_PLANE_REG
,
188 VGA_AC_HORZ_PANNING_REG
,
189 VGA_AC_COLOR_SEL_REG
,
193 /* FUNCTIONS ******************************************************************/
195 DWORD
VgaGetVideoBaseAddress(VOID
);
196 DWORD
VgaGetVideoLimitAddress(VOID
);
197 COORD
VgaGetDisplayResolution(VOID
);
198 VOID
VgaRefreshDisplay(VOID
);
199 VOID
VgaHorizontalRetrace(VOID
);
200 VOID
VgaReadMemory(DWORD Address
, LPBYTE Buffer
, DWORD Size
);
201 VOID
VgaWriteMemory(DWORD Address
, LPBYTE Buffer
, DWORD Size
);
202 BYTE
VgaReadPort(WORD Port
);
203 VOID
VgaWritePort(WORD Port
, BYTE Data
);
204 VOID
VgaClearMemory(VOID
);
205 VOID
VgaResetPalette(VOID
);
206 BOOLEAN
VgaInitialize(HANDLE TextHandle
);