2 * COPYRIGHT: GPL - See COPYING in the top level directory
3 * PROJECT: ReactOS Virtual DOS Machine
5 * PURPOSE: VGA hardware emulation
6 * PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
9 /* INCLUDES *******************************************************************/
15 #include "../bios/vidbios.h"
19 /* PRIVATE VARIABLES **********************************************************/
21 static CONST DWORD MemoryBase
[] = { 0xA0000, 0xA0000, 0xB0000, 0xB8000 };
22 static CONST DWORD MemoryLimit
[] = { 0xAFFFF, 0xAFFFF, 0xB7FFF, 0xBFFFF };
24 #define USE_REACTOS_COLORS
25 // #define USE_DOSBOX_COLORS
27 #if defined(USE_REACTOS_COLORS)
30 static CONST COLORREF VgaDefaultPalette
[VGA_MAX_COLORS
] =
32 RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0xAA), RGB(0x00, 0xAA, 0x00), RGB(0x00, 0xAA, 0xAA),
33 RGB(0xAA, 0x00, 0x00), RGB(0xAA, 0x00, 0xAA), RGB(0xAA, 0x55, 0x00), RGB(0xAA, 0xAA, 0xAA),
34 RGB(0x55, 0x55, 0x55), RGB(0x55, 0x55, 0xFF), RGB(0x55, 0xFF, 0x55), RGB(0x55, 0xFF, 0xFF),
35 RGB(0xFF, 0x55, 0x55), RGB(0xFF, 0x55, 0xFF), RGB(0xFF, 0xFF, 0x55), RGB(0xFF, 0xFF, 0xFF),
36 RGB(0x00, 0x00, 0x00), RGB(0x10, 0x10, 0x10), RGB(0x20, 0x20, 0x20), RGB(0x35, 0x35, 0x35),
37 RGB(0x45, 0x45, 0x45), RGB(0x55, 0x55, 0x55), RGB(0x65, 0x65, 0x65), RGB(0x75, 0x75, 0x75),
38 RGB(0x8A, 0x8A, 0x8A), RGB(0x9A, 0x9A, 0x9A), RGB(0xAA, 0xAA, 0xAA), RGB(0xBA, 0xBA, 0xBA),
39 RGB(0xCA, 0xCA, 0xCA), RGB(0xDF, 0xDF, 0xDF), RGB(0xEF, 0xEF, 0xEF), RGB(0xFF, 0xFF, 0xFF),
40 RGB(0x00, 0x00, 0xFF), RGB(0x41, 0x00, 0xFF), RGB(0x82, 0x00, 0xFF), RGB(0xBE, 0x00, 0xFF),
41 RGB(0xFF, 0x00, 0xFF), RGB(0xFF, 0x00, 0xBE), RGB(0xFF, 0x00, 0x82), RGB(0xFF, 0x00, 0x41),
42 RGB(0xFF, 0x00, 0x00), RGB(0xFF, 0x41, 0x00), RGB(0xFF, 0x82, 0x00), RGB(0xFF, 0xBE, 0x00),
43 RGB(0xFF, 0xFF, 0x00), RGB(0xBE, 0xFF, 0x00), RGB(0x82, 0xFF, 0x00), RGB(0x41, 0xFF, 0x00),
44 RGB(0x00, 0xFF, 0x00), RGB(0x00, 0xFF, 0x41), RGB(0x00, 0xFF, 0x82), RGB(0x00, 0xFF, 0xBE),
45 RGB(0x00, 0xFF, 0xFF), RGB(0x00, 0xBE, 0xFF), RGB(0x00, 0x82, 0xFF), RGB(0x00, 0x41, 0xFF),
46 RGB(0x82, 0x82, 0xFF), RGB(0x9E, 0x82, 0xFF), RGB(0xBE, 0x82, 0xFF), RGB(0xDF, 0x82, 0xFF),
47 RGB(0xFF, 0x82, 0xFF), RGB(0xFF, 0x82, 0xDF), RGB(0xFF, 0x82, 0xBE), RGB(0xFF, 0x82, 0x9E),
48 RGB(0xFF, 0x82, 0x82), RGB(0xFF, 0x9E, 0x82), RGB(0xFF, 0xBE, 0x82), RGB(0xFF, 0xDF, 0x82),
49 RGB(0xFF, 0xFF, 0x82), RGB(0xDF, 0xFF, 0x82), RGB(0xBE, 0xFF, 0x82), RGB(0x9E, 0xFF, 0x82),
50 RGB(0x82, 0xFF, 0x82), RGB(0x82, 0xFF, 0x9E), RGB(0x82, 0xFF, 0xBE), RGB(0x82, 0xFF, 0xDF),
51 RGB(0x82, 0xFF, 0xFF), RGB(0x82, 0xDF, 0xFF), RGB(0x82, 0xBE, 0xFF), RGB(0x82, 0x9E, 0xFF),
52 RGB(0xBA, 0xBA, 0xFF), RGB(0xCA, 0xBA, 0xFF), RGB(0xDF, 0xBA, 0xFF), RGB(0xEF, 0xBA, 0xFF),
53 RGB(0xFF, 0xBA, 0xFF), RGB(0xFF, 0xBA, 0xEF), RGB(0xFF, 0xBA, 0xDF), RGB(0xFF, 0xBA, 0xCA),
54 RGB(0xFF, 0xBA, 0xBA), RGB(0xFF, 0xCA, 0xBA), RGB(0xFF, 0xDF, 0xBA), RGB(0xFF, 0xEF, 0xBA),
55 RGB(0xFF, 0xFF, 0xBA), RGB(0xEF, 0xFF, 0xBA), RGB(0xDF, 0xFF, 0xBA), RGB(0xCA, 0xFF, 0xBA),
56 RGB(0xBA, 0xFF, 0xBA), RGB(0xBA, 0xFF, 0xCA), RGB(0xBA, 0xFF, 0xDF), RGB(0xBA, 0xFF, 0xEF),
57 RGB(0xBA, 0xFF, 0xFF), RGB(0xBA, 0xEF, 0xFF), RGB(0xBA, 0xDF, 0xFF), RGB(0xBA, 0xCA, 0xFF),
58 RGB(0x00, 0x00, 0x71), RGB(0x1C, 0x00, 0x71), RGB(0x39, 0x00, 0x71), RGB(0x55, 0x00, 0x71),
59 RGB(0x71, 0x00, 0x71), RGB(0x71, 0x00, 0x55), RGB(0x71, 0x00, 0x39), RGB(0x71, 0x00, 0x1C),
60 RGB(0x71, 0x00, 0x00), RGB(0x71, 0x1C, 0x00), RGB(0x71, 0x39, 0x00), RGB(0x71, 0x55, 0x00),
61 RGB(0x71, 0x71, 0x00), RGB(0x55, 0x71, 0x00), RGB(0x39, 0x71, 0x00), RGB(0x1C, 0x71, 0x00),
62 RGB(0x00, 0x71, 0x00), RGB(0x00, 0x71, 0x1C), RGB(0x00, 0x71, 0x39), RGB(0x00, 0x71, 0x55),
63 RGB(0x00, 0x71, 0x71), RGB(0x00, 0x55, 0x71), RGB(0x00, 0x39, 0x71), RGB(0x00, 0x1C, 0x71),
64 RGB(0x39, 0x39, 0x71), RGB(0x45, 0x39, 0x71), RGB(0x55, 0x39, 0x71), RGB(0x61, 0x39, 0x71),
65 RGB(0x71, 0x39, 0x71), RGB(0x71, 0x39, 0x61), RGB(0x71, 0x39, 0x55), RGB(0x71, 0x39, 0x45),
66 RGB(0x71, 0x39, 0x39), RGB(0x71, 0x45, 0x39), RGB(0x71, 0x55, 0x39), RGB(0x71, 0x61, 0x39),
67 RGB(0x71, 0x71, 0x39), RGB(0x61, 0x71, 0x39), RGB(0x55, 0x71, 0x39), RGB(0x45, 0x71, 0x39),
68 RGB(0x39, 0x71, 0x39), RGB(0x39, 0x71, 0x45), RGB(0x39, 0x71, 0x55), RGB(0x39, 0x71, 0x61),
69 RGB(0x39, 0x71, 0x71), RGB(0x39, 0x61, 0x71), RGB(0x39, 0x55, 0x71), RGB(0x39, 0x45, 0x71),
70 RGB(0x51, 0x51, 0x71), RGB(0x59, 0x51, 0x71), RGB(0x61, 0x51, 0x71), RGB(0x69, 0x51, 0x71),
71 RGB(0x71, 0x51, 0x71), RGB(0x71, 0x51, 0x69), RGB(0x71, 0x51, 0x61), RGB(0x71, 0x51, 0x59),
72 RGB(0x71, 0x51, 0x51), RGB(0x71, 0x59, 0x51), RGB(0x71, 0x61, 0x51), RGB(0x71, 0x69, 0x51),
73 RGB(0x71, 0x71, 0x51), RGB(0x69, 0x71, 0x51), RGB(0x61, 0x71, 0x51), RGB(0x59, 0x71, 0x51),
74 RGB(0x51, 0x71, 0x51), RGB(0x51, 0x71, 0x59), RGB(0x51, 0x71, 0x61), RGB(0x51, 0x71, 0x69),
75 RGB(0x51, 0x71, 0x71), RGB(0x51, 0x69, 0x71), RGB(0x51, 0x61, 0x71), RGB(0x51, 0x59, 0x71),
76 RGB(0x00, 0x00, 0x41), RGB(0x10, 0x00, 0x41), RGB(0x20, 0x00, 0x41), RGB(0x31, 0x00, 0x41),
77 RGB(0x41, 0x00, 0x41), RGB(0x41, 0x00, 0x31), RGB(0x41, 0x00, 0x20), RGB(0x41, 0x00, 0x10),
78 RGB(0x41, 0x00, 0x00), RGB(0x41, 0x10, 0x00), RGB(0x41, 0x20, 0x00), RGB(0x41, 0x31, 0x00),
79 RGB(0x41, 0x41, 0x00), RGB(0x31, 0x41, 0x00), RGB(0x20, 0x41, 0x00), RGB(0x10, 0x41, 0x00),
80 RGB(0x00, 0x41, 0x00), RGB(0x00, 0x41, 0x10), RGB(0x00, 0x41, 0x20), RGB(0x00, 0x41, 0x31),
81 RGB(0x00, 0x41, 0x41), RGB(0x00, 0x31, 0x41), RGB(0x00, 0x20, 0x41), RGB(0x00, 0x10, 0x41),
82 RGB(0x20, 0x20, 0x41), RGB(0x28, 0x20, 0x41), RGB(0x31, 0x20, 0x41), RGB(0x39, 0x20, 0x41),
83 RGB(0x41, 0x20, 0x41), RGB(0x41, 0x20, 0x39), RGB(0x41, 0x20, 0x31), RGB(0x41, 0x20, 0x28),
84 RGB(0x41, 0x20, 0x20), RGB(0x41, 0x28, 0x20), RGB(0x41, 0x31, 0x20), RGB(0x41, 0x39, 0x20),
85 RGB(0x41, 0x41, 0x20), RGB(0x39, 0x41, 0x20), RGB(0x31, 0x41, 0x20), RGB(0x28, 0x41, 0x20),
86 RGB(0x20, 0x41, 0x20), RGB(0x20, 0x41, 0x28), RGB(0x20, 0x41, 0x31), RGB(0x20, 0x41, 0x39),
87 RGB(0x20, 0x41, 0x41), RGB(0x20, 0x39, 0x41), RGB(0x20, 0x31, 0x41), RGB(0x20, 0x28, 0x41),
88 RGB(0x2D, 0x2D, 0x41), RGB(0x31, 0x2D, 0x41), RGB(0x35, 0x2D, 0x41), RGB(0x3D, 0x2D, 0x41),
89 RGB(0x41, 0x2D, 0x41), RGB(0x41, 0x2D, 0x3D), RGB(0x41, 0x2D, 0x35), RGB(0x41, 0x2D, 0x31),
90 RGB(0x41, 0x2D, 0x2D), RGB(0x41, 0x31, 0x2D), RGB(0x41, 0x35, 0x2D), RGB(0x41, 0x3D, 0x2D),
91 RGB(0x41, 0x41, 0x2D), RGB(0x3D, 0x41, 0x2D), RGB(0x35, 0x41, 0x2D), RGB(0x31, 0x41, 0x2D),
92 RGB(0x2D, 0x41, 0x2D), RGB(0x2D, 0x41, 0x31), RGB(0x2D, 0x41, 0x35), RGB(0x2D, 0x41, 0x3D),
93 RGB(0x2D, 0x41, 0x41), RGB(0x2D, 0x3D, 0x41), RGB(0x2D, 0x35, 0x41), RGB(0x2D, 0x31, 0x41),
94 RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00),
95 RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00)
98 #elif defined(USE_DOSBOX_COLORS)
101 static CONST COLORREF VgaDefaultPalette
[VGA_MAX_COLORS
] =
103 RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0xAA), RGB(0x00, 0xAA, 0x00), RGB(0x00, 0xAA, 0xAA),
104 RGB(0xAA, 0x00, 0x00), RGB(0xAA, 0x00, 0xAA), RGB(0xAA, 0x55, 0x00), RGB(0xAA, 0xAA, 0xAA),
105 RGB(0x55, 0x55, 0x55), RGB(0x55, 0x55, 0xFF), RGB(0x55, 0xFF, 0x55), RGB(0x55, 0xFF, 0xFF),
106 RGB(0xFF, 0x55, 0x55), RGB(0xFF, 0x55, 0xFF), RGB(0xFF, 0xFF, 0x55), RGB(0xFF, 0xFF, 0xFF),
107 RGB(0x00, 0x00, 0x00), RGB(0x14, 0x14, 0x14), RGB(0x20, 0x20, 0x20), RGB(0x2C, 0x2C, 0x2C),
108 RGB(0x38, 0x38, 0x38), RGB(0x45, 0x45, 0x45), RGB(0x51, 0x51, 0x51), RGB(0x61, 0x61, 0x61),
109 RGB(0x71, 0x71, 0x71), RGB(0x82, 0x82, 0x82), RGB(0x92, 0x92, 0x92), RGB(0xA2, 0xA2, 0xA2),
110 RGB(0xB6, 0xB6, 0xB6), RGB(0xCB, 0xCB, 0xCB), RGB(0xE3, 0xE3, 0xE3), RGB(0xFF, 0xFF, 0xFF),
111 RGB(0x00, 0x00, 0xFF), RGB(0x41, 0x00, 0xFF), RGB(0x7D, 0x00, 0xFF), RGB(0xBE, 0x00, 0xFF),
112 RGB(0xFF, 0x00, 0xFF), RGB(0xFF, 0x00, 0xBE), RGB(0xFF, 0x00, 0x7D), RGB(0xFF, 0x00, 0x41),
113 RGB(0xFF, 0x00, 0x00), RGB(0xFF, 0x41, 0x00), RGB(0xFF, 0x7D, 0x00), RGB(0xFF, 0xBE, 0x00),
114 RGB(0xFF, 0xFF, 0x00), RGB(0xBE, 0xFF, 0x00), RGB(0x7D, 0xFF, 0x00), RGB(0x41, 0xFF, 0x00),
115 RGB(0x00, 0xFF, 0x00), RGB(0x00, 0xFF, 0x41), RGB(0x00, 0xFF, 0x7D), RGB(0x00, 0xFF, 0xBE),
116 RGB(0x00, 0xFF, 0xFF), RGB(0x00, 0xBE, 0xFF), RGB(0x00, 0x7D, 0xFF), RGB(0x00, 0x41, 0xFF),
117 RGB(0x7D, 0x7D, 0xFF), RGB(0x9E, 0x7D, 0xFF), RGB(0xBE, 0x7D, 0xFF), RGB(0xDF, 0x7D, 0xFF),
118 RGB(0xFF, 0x7D, 0xFF), RGB(0xFF, 0x7D, 0xDF), RGB(0xFF, 0x7D, 0xBE), RGB(0xFF, 0x7D, 0x9E),
120 RGB(0xFF, 0x7D, 0x7D), RGB(0xFF, 0x9E, 0x7D), RGB(0xFF, 0xBE, 0x7D), RGB(0xFF, 0xDF, 0x7D),
121 RGB(0xFF, 0xFF, 0x7D), RGB(0xDF, 0xFF, 0x7D), RGB(0xBE, 0xFF, 0x7D), RGB(0x9E, 0xFF, 0x7D),
122 RGB(0x7D, 0xFF, 0x7D), RGB(0x7D, 0xFF, 0x9E), RGB(0x7D, 0xFF, 0xBE), RGB(0x7D, 0xFF, 0xDF),
123 RGB(0x7D, 0xFF, 0xFF), RGB(0x7D, 0xDF, 0xFF), RGB(0x7D, 0xBE, 0xFF), RGB(0x7D, 0x9E, 0xFF),
124 RGB(0xB6, 0xB6, 0xFF), RGB(0xC7, 0xB6, 0xFF), RGB(0xDB, 0xB6, 0xFF), RGB(0xEB, 0xB6, 0xFF),
125 RGB(0xFF, 0xB6, 0xFF), RGB(0xFF, 0xB6, 0xEB), RGB(0xFF, 0xB6, 0xDB), RGB(0xFF, 0xB6, 0xC7),
126 RGB(0xFF, 0xB6, 0xB6), RGB(0xFF, 0xC7, 0xB6), RGB(0xFF, 0xDB, 0xB6), RGB(0xFF, 0xEB, 0xB6),
127 RGB(0xFF, 0xFF, 0xB6), RGB(0xEB, 0xFF, 0xB6), RGB(0xDB, 0xFF, 0xB6), RGB(0xC7, 0xFF, 0xB6),
128 RGB(0xB6, 0xFF, 0xB6), RGB(0xB6, 0xFF, 0xC7), RGB(0xB6, 0xFF, 0xDB), RGB(0xB6, 0xFF, 0xEB),
129 RGB(0xB6, 0xFF, 0xFF), RGB(0xB6, 0xEB, 0xFF), RGB(0xB6, 0xDB, 0xFF), RGB(0xB6, 0xC7, 0xFF),
130 RGB(0x00, 0x00, 0x71), RGB(0x1C, 0x00, 0x71), RGB(0x38, 0x00, 0x71), RGB(0x55, 0x00, 0x71),
131 RGB(0x71, 0x00, 0x71), RGB(0x71, 0x00, 0x55), RGB(0x71, 0x00, 0x38), RGB(0x71, 0x00, 0x1C),
132 RGB(0x71, 0x00, 0x00), RGB(0x71, 0x1C, 0x00), RGB(0x71, 0x38, 0x00), RGB(0x71, 0x55, 0x00),
133 RGB(0x71, 0x71, 0x00), RGB(0x55, 0x71, 0x00), RGB(0x38, 0x71, 0x00), RGB(0x1C, 0x71, 0x00),
134 RGB(0x00, 0x71, 0x00), RGB(0x00, 0x71, 0x1C), RGB(0x00, 0x71, 0x38), RGB(0x00, 0x71, 0x55),
135 RGB(0x00, 0x71, 0x71), RGB(0x00, 0x55, 0x71), RGB(0x00, 0x38, 0x71), RGB(0x00, 0x1C, 0x71),
137 RGB(0x38, 0x38, 0x71), RGB(0x45, 0x38, 0x71), RGB(0x55, 0x38, 0x71), RGB(0x61, 0x38, 0x71),
138 RGB(0x71, 0x38, 0x71), RGB(0x71, 0x38, 0x61), RGB(0x71, 0x38, 0x55), RGB(0x71, 0x38, 0x45),
139 RGB(0x71, 0x38, 0x38), RGB(0x71, 0x45, 0x38), RGB(0x71, 0x55, 0x38), RGB(0x71, 0x61, 0x38),
140 RGB(0x71, 0x71, 0x38), RGB(0x61, 0x71, 0x38), RGB(0x55, 0x71, 0x38), RGB(0x45, 0x71, 0x38),
141 RGB(0x38, 0x71, 0x38), RGB(0x38, 0x71, 0x45), RGB(0x38, 0x71, 0x55), RGB(0x38, 0x71, 0x61),
142 RGB(0x38, 0x71, 0x71), RGB(0x38, 0x61, 0x71), RGB(0x38, 0x55, 0x71), RGB(0x38, 0x45, 0x71),
143 RGB(0x51, 0x51, 0x71), RGB(0x59, 0x51, 0x71), RGB(0x61, 0x51, 0x71), RGB(0x69, 0x51, 0x71),
144 RGB(0x71, 0x51, 0x71), RGB(0x71, 0x51, 0x69), RGB(0x71, 0x51, 0x61), RGB(0x71, 0x51, 0x59),
145 RGB(0x71, 0x51, 0x51), RGB(0x71, 0x59, 0x51), RGB(0x71, 0x61, 0x51), RGB(0x71, 0x69, 0x51),
146 RGB(0x71, 0x71, 0x51), RGB(0x69, 0x71, 0x51), RGB(0x61, 0x71, 0x51), RGB(0x59, 0x71, 0x51),
147 RGB(0x51, 0x71, 0x51), RGB(0x51, 0x71, 0x59), RGB(0x51, 0x71, 0x61), RGB(0x51, 0x71, 0x69),
148 RGB(0x51, 0x71, 0x71), RGB(0x51, 0x69, 0x71), RGB(0x51, 0x61, 0x71), RGB(0x51, 0x59, 0x71),
149 RGB(0x00, 0x00, 0x41), RGB(0x10, 0x00, 0x41), RGB(0x20, 0x00, 0x41), RGB(0x30, 0x00, 0x41),
150 RGB(0x41, 0x00, 0x41), RGB(0x41, 0x00, 0x30), RGB(0x41, 0x00, 0x20), RGB(0x41, 0x00, 0x10),
151 RGB(0x41, 0x00, 0x00), RGB(0x41, 0x10, 0x00), RGB(0x41, 0x20, 0x00), RGB(0x41, 0x30, 0x00),
152 RGB(0x41, 0x41, 0x00), RGB(0x30, 0x41, 0x00), RGB(0x20, 0x41, 0x00), RGB(0x10, 0x41, 0x00),
154 RGB(0x00, 0x41, 0x00), RGB(0x00, 0x41, 0x10), RGB(0x00, 0x41, 0x20), RGB(0x00, 0x41, 0x30),
155 RGB(0x00, 0x41, 0x41), RGB(0x00, 0x30, 0x41), RGB(0x00, 0x20, 0x41), RGB(0x00, 0x10, 0x41),
156 RGB(0x20, 0x20, 0x41), RGB(0x28, 0x20, 0x41), RGB(0x30, 0x20, 0x41), RGB(0x38, 0x20, 0x41),
157 RGB(0x41, 0x20, 0x41), RGB(0x41, 0x20, 0x38), RGB(0x41, 0x20, 0x30), RGB(0x41, 0x20, 0x28),
158 RGB(0x41, 0x20, 0x20), RGB(0x41, 0x28, 0x20), RGB(0x41, 0x30, 0x20), RGB(0x41, 0x38, 0x20),
159 RGB(0x41, 0x41, 0x20), RGB(0x38, 0x41, 0x20), RGB(0x30, 0x41, 0x20), RGB(0x28, 0x41, 0x20),
160 RGB(0x20, 0x41, 0x20), RGB(0x20, 0x41, 0x28), RGB(0x20, 0x41, 0x30), RGB(0x20, 0x41, 0x38),
161 RGB(0x20, 0x41, 0x41), RGB(0x20, 0x38, 0x41), RGB(0x20, 0x30, 0x41), RGB(0x20, 0x28, 0x41),
162 RGB(0x2C, 0x2C, 0x41), RGB(0x30, 0x2C, 0x41), RGB(0x34, 0x2C, 0x41), RGB(0x3C, 0x2C, 0x41),
163 RGB(0x41, 0x2C, 0x41), RGB(0x41, 0x2C, 0x3C), RGB(0x41, 0x2C, 0x34), RGB(0x41, 0x2C, 0x30),
164 RGB(0x41, 0x2C, 0x2C), RGB(0x41, 0x30, 0x2C), RGB(0x41, 0x34, 0x2C), RGB(0x41, 0x3C, 0x2C),
165 RGB(0x41, 0x41, 0x2C), RGB(0x3C, 0x41, 0x2C), RGB(0x34, 0x41, 0x2C), RGB(0x30, 0x41, 0x2C),
166 RGB(0x2C, 0x41, 0x2C), RGB(0x2C, 0x41, 0x30), RGB(0x2C, 0x41, 0x34), RGB(0x2C, 0x41, 0x3C),
167 RGB(0x2C, 0x41, 0x41), RGB(0x2C, 0x3C, 0x41), RGB(0x2C, 0x34, 0x41), RGB(0x2C, 0x30, 0x41),
168 RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00),
169 RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00)
175 * Console interface -- VGA-mode-agnostic
177 typedef struct _CHAR_CELL
181 } CHAR_CELL
, *PCHAR_CELL
;
182 C_ASSERT(sizeof(CHAR_CELL
) == 2);
184 static LPVOID ConsoleFramebuffer
= NULL
; // Active framebuffer, points to
185 // either TextFramebuffer or a valid
186 // graphics framebuffer.
187 static HPALETTE PaletteHandle
= NULL
;
189 static HANDLE StartEvent
= NULL
;
190 static HANDLE EndEvent
= NULL
;
191 static HANDLE AnotherEvent
= NULL
;
193 static CONSOLE_CURSOR_INFO OrgConsoleCursorInfo
;
194 static CONSOLE_SCREEN_BUFFER_INFO OrgConsoleBufferInfo
;
198 * Text mode -- we always keep a valid text mode framebuffer
199 * even if we are in graphics mode. This is needed in order to
200 * keep a consistent VGA state.
202 static CONSOLE_SCREEN_BUFFER_INFO ConsoleInfo
;
203 static COORD TextResolution
= {0};
204 static PCHAR_CELL TextFramebuffer
= NULL
;
205 static HANDLE TextConsoleBuffer
= NULL
;
208 static HANDLE GraphicsConsoleBuffer
= NULL
;
209 static HANDLE ConsoleMutex
= NULL
;
210 static BOOLEAN DoubleVision
= FALSE
;
215 static BYTE VgaMemory
[VGA_NUM_BANKS
* VGA_BANK_SIZE
];
217 static BYTE VgaLatchRegisters
[VGA_NUM_BANKS
] = {0, 0, 0, 0};
219 static BYTE VgaMiscRegister
;
220 static BYTE VgaFeatureRegister
;
222 static BYTE VgaSeqIndex
= VGA_SEQ_RESET_REG
;
223 static BYTE VgaSeqRegisters
[VGA_SEQ_MAX_REG
];
225 static BYTE VgaCrtcIndex
= VGA_CRTC_HORZ_TOTAL_REG
;
226 static BYTE VgaCrtcRegisters
[VGA_CRTC_MAX_REG
];
228 static BYTE VgaGcIndex
= VGA_GC_RESET_REG
;
229 static BYTE VgaGcRegisters
[VGA_GC_MAX_REG
];
231 static BOOLEAN VgaAcLatch
= FALSE
;
232 static BOOLEAN VgaAcPalDisable
= TRUE
;
233 static BYTE VgaAcIndex
= VGA_AC_PAL_0_REG
;
234 static BYTE VgaAcRegisters
[VGA_AC_MAX_REG
];
236 // static VGA_REGISTERS VgaRegisters;
238 static BYTE VgaDacMask
= 0xFF;
239 static WORD VgaDacIndex
= 0;
240 static BOOLEAN VgaDacReadWrite
= FALSE
;
241 static BYTE VgaDacRegisters
[VGA_PALETTE_SIZE
];
243 static BOOLEAN InVerticalRetrace
= FALSE
;
244 static BOOLEAN InHorizontalRetrace
= FALSE
;
246 static BOOLEAN NeedsUpdate
= FALSE
;
247 static BOOLEAN ModeChanged
= FALSE
;
248 static BOOLEAN CursorMoved
= FALSE
;
249 static BOOLEAN PaletteChanged
= FALSE
;
256 } ScreenMode
= TEXT_MODE
;
258 static SMALL_RECT UpdateRectangle
= { 0, 0, 0, 0 };
260 /* RegisterConsoleVDM EMULATION ***********************************************/
262 #include <ntddvdeo.h>
266 (WINAPI
*pRegisterConsoleVDM
)
269 HANDLE EventHandle_1
,
270 HANDLE EventHandle_2
,
271 HANDLE EventHandle_3
,
273 PVOID returned_val_1
,
274 PVOID
*returned_val_2
,
275 PVOID lpUnknownBuffer
,
276 DWORD theUnknownBufferLength
,
277 COORD theVDMBufferSize
,
287 HANDLE EventHandle_1
,
288 HANDLE EventHandle_2
,
289 HANDLE EventHandle_3
,
291 PVOID returned_val_1
,
292 PVOID
*returned_val_2
,
293 PVOID lpUnknownBuffer
,
294 DWORD theUnknownBufferLength
,
295 COORD theVDMBufferSize
,
299 HMODULE hKernel32
= NULL
;
300 pRegisterConsoleVDM RegisterConsoleVDM
= NULL
;
304 * This private buffer, per-console, is used by
305 * RegisterConsoleVDM and InvalidateConsoleDIBits.
307 static COORD VDMBufferSize
= {0};
308 static PCHAR_CELL VDMBuffer
= NULL
;
310 static PCHAR_INFO CharBuff
= NULL
; // This is a hack, which is unneeded
311 // for the real RegisterConsoleVDM and
312 // InvalidateConsoleDIBits
316 __RegisterConsoleVDM(BOOL IsDosVDM_flag
,
317 HANDLE EventHandle_1
,
318 HANDLE EventHandle_2
,
319 HANDLE EventHandle_3
,
321 PVOID returned_val_1
,
322 PVOID
*returned_val_2
,
323 PVOID lpUnknownBuffer
,
324 DWORD theUnknownBufferLength
,
325 COORD theVDMBufferSize
,
328 UNREFERENCED_PARAMETER(EventHandle_3
);
329 UNREFERENCED_PARAMETER(Unused1
);
330 UNREFERENCED_PARAMETER(returned_val_1
);
331 UNREFERENCED_PARAMETER(returned_val_2
);
332 UNREFERENCED_PARAMETER(lpUnknownBuffer
);
333 UNREFERENCED_PARAMETER(theUnknownBufferLength
);
336 DPRINT1("__RegisterConsoleVDM(%d)\n", IsDosVDM_flag
);
338 if (lpVDMBuffer
== NULL
) return FALSE
;
342 // if (EventHandle_1 == NULL || EventHandle_2 == NULL) return FALSE;
343 if (VDMBuffer
!= NULL
) return FALSE
;
345 VDMBufferSize
= theVDMBufferSize
;
347 /* HACK: Cache -- to be removed in the real implementation */
348 CharBuff
= HeapAlloc(GetProcessHeap(),
350 theVDMBufferSize
.X
* theVDMBufferSize
.Y
351 * sizeof(CHAR_INFO
));
354 VDMBuffer
= HeapAlloc(GetProcessHeap(),
356 theVDMBufferSize
.X
* theVDMBufferSize
.Y
357 * sizeof(CHAR_CELL
));
358 *lpVDMBuffer
= (PCHAR
)VDMBuffer
;
359 return (VDMBuffer
!= NULL
);
363 /* HACK: Cache -- to be removed in the real implementation */
364 if (CharBuff
) HeapFree(GetProcessHeap(), 0, CharBuff
);
367 if (VDMBuffer
) HeapFree(GetProcessHeap(), 0, VDMBuffer
);
370 VDMBufferSize
.X
= VDMBufferSize
.Y
= 0;
377 __InvalidateConsoleDIBits(IN HANDLE hConsoleOutput
,
378 IN PSMALL_RECT lpRect
)
380 if ((hConsoleOutput
== TextConsoleBuffer
) && (VDMBuffer
!= NULL
))
382 /* HACK: Write the cached data to the console */
384 COORD Origin
= { lpRect
->Left
, lpRect
->Top
};
389 for (i
= 0; i
< VDMBufferSize
.Y
; i
++)
391 for (j
= 0; j
< VDMBufferSize
.X
; j
++)
393 CharBuff
[i
* VDMBufferSize
.X
+ j
].Char
.AsciiChar
= VDMBuffer
[i
* VDMBufferSize
.X
+ j
].Char
;
394 CharBuff
[i
* VDMBufferSize
.X
+ j
].Attributes
= VDMBuffer
[i
* VDMBufferSize
.X
+ j
].Attributes
;
398 WriteConsoleOutputA(hConsoleOutput
,
405 return InvalidateConsoleDIBits(hConsoleOutput
, lpRect
);
408 /* PRIVATE FUNCTIONS **********************************************************/
410 static inline DWORD
VgaGetAddressSize(VOID
);
411 static VOID
VgaUpdateTextCursor(VOID
);
413 static VOID
VgaUpdateCursorPosition(VOID
)
416 * Update the cursor position in the VGA registers.
418 WORD Offset
= ConsoleInfo
.dwCursorPosition
.Y
* TextResolution
.X
+
419 ConsoleInfo
.dwCursorPosition
.X
;
421 VgaCrtcRegisters
[VGA_CRTC_CURSOR_LOC_LOW_REG
] = LOBYTE(Offset
);
422 VgaCrtcRegisters
[VGA_CRTC_CURSOR_LOC_HIGH_REG
] = HIBYTE(Offset
);
424 VidBiosSyncCursorPosition();
425 VgaUpdateTextCursor();
428 static BOOL
VgaAttachToConsoleInternal(PCOORD Resolution
)
432 PVIDEO_HARDWARE_STATE_HEADER State
;
435 DWORD AddressSize
, ScanlineSize
;
439 COORD Origin
= { 0, 0 };
441 ASSERT(TextFramebuffer
== NULL
);
443 TextResolution
= *Resolution
;
446 * Windows 2k3 winsrv.dll calls NtVdmControl(VdmQueryVdmProcess == 14, &ConsoleHandle);
447 * in the two following APIs:
448 * SrvRegisterConsoleVDM (corresponding win32 API: RegisterConsoleVDM)
449 * SrvVDMConsoleOperation (corresponding Win32 API: )
450 * to check whether the current process is a VDM process, and fails otherwise with the
451 * error 0xC0000022 ().
453 * It is worth it to notice that also basesrv.dll does the same only for the
454 * BaseSrvIsFirstVDM API...
458 __RegisterConsoleVDM(1,
461 AnotherEvent
, // NULL,
463 &Length
, // NULL, <-- putting this (and null in the next var) makes the API returning error 12 "ERROR_INVALID_ACCESS"
464 (PVOID
*)&State
, // NULL,
468 (PCHAR
*)&TextFramebuffer
);
471 DisplayMessage(L
"RegisterConsoleVDM failed with error %d\n", GetLastError());
480 ConRect
.Top
= ConsoleInfo
.srWindow
.Top
;
481 ConRect
.Right
= ConRect
.Left
+ Resolution
->X
- 1;
482 ConRect
.Bottom
= ConRect
.Top
+ Resolution
->Y
- 1;
484 * Use this trick to effectively resize the console buffer and window,
486 * - SetConsoleScreenBufferSize fails if the new console screen buffer size
487 * is smaller than the current console window size, and:
488 * - SetConsoleWindowInfo fails if the new console window size is larger
489 * than the current console screen buffer size.
491 SetConsoleScreenBufferSize(TextConsoleBuffer
, *Resolution
);
492 SetConsoleWindowInfo(TextConsoleBuffer
, TRUE
, &ConRect
);
493 SetConsoleScreenBufferSize(TextConsoleBuffer
, *Resolution
);
494 /* Update the saved console information */
495 GetConsoleScreenBufferInfo(TextConsoleBuffer
, &ConsoleInfo
);
498 * Copy console data into VGA memory
502 AddressSize
= VgaGetAddressSize();
503 ConRect
.Left
= ConRect
.Top
= 0;
504 ConRect
.Right
= TextResolution
.X
;
505 ConRect
.Bottom
= TextResolution
.Y
;
506 ScanlineSize
= (DWORD
)VgaCrtcRegisters
[VGA_CRTC_OFFSET_REG
] * 2;
508 /* Read the data from the console into the framebuffer... */
509 ReadConsoleOutputA(TextConsoleBuffer
,
515 /* ... and copy the framebuffer into the VGA memory */
517 /* Loop through the scanlines */
518 for (i
= 0; i
< TextResolution
.Y
; i
++)
520 /* Loop through the characters */
521 for (j
= 0; j
< TextResolution
.X
; j
++)
523 CurrentAddr
= LOWORD((Address
+ j
) * AddressSize
);
525 /* Store the character in plane 0 */
526 VgaMemory
[CurrentAddr
] = CharBuff
[i
* TextResolution
.X
+ j
].Char
.AsciiChar
;
528 /* Store the attribute in plane 1 */
529 VgaMemory
[CurrentAddr
+ VGA_BANK_SIZE
] = (BYTE
)CharBuff
[i
* TextResolution
.X
+ j
].Attributes
;
532 /* Move to the next scanline */
533 Address
+= ScanlineSize
;
536 VgaUpdateCursorPosition();
541 BOOL
VgaAttachToConsole(VOID
)
543 if (TextResolution
.X
== 0 || TextResolution
.Y
== 0)
544 DPRINT1("VgaAttachToConsole -- TextResolution uninitialized\n");
546 if (TextResolution
.X
== 0) TextResolution
.X
= 80;
547 if (TextResolution
.Y
== 0) TextResolution
.Y
= 25;
549 return VgaAttachToConsoleInternal(&TextResolution
);
552 VOID
VgaDetachFromConsole(BOOL ChangingMode
)
556 COORD dummySize
= {0};
558 __RegisterConsoleVDM(0,
570 TextFramebuffer
= NULL
;
576 /* Restore the old screen buffer */
577 SetConsoleActiveScreenBuffer(TextConsoleBuffer
);
579 /* Restore the original console size */
582 ConRect
.Right
= ConRect
.Left
+ OrgConsoleBufferInfo
.srWindow
.Right
- OrgConsoleBufferInfo
.srWindow
.Left
;
583 ConRect
.Bottom
= ConRect
.Top
+ OrgConsoleBufferInfo
.srWindow
.Bottom
- OrgConsoleBufferInfo
.srWindow
.Top
;
585 * See the following trick explanation in VgaAttachToConsoleInternal.
587 SetConsoleScreenBufferSize(TextConsoleBuffer
, OrgConsoleBufferInfo
.dwSize
);
588 SetConsoleWindowInfo(TextConsoleBuffer
, TRUE
, &ConRect
);
589 SetConsoleScreenBufferSize(TextConsoleBuffer
, OrgConsoleBufferInfo
.dwSize
);
591 /* Restore the original cursor shape */
592 SetConsoleCursorInfo(TextConsoleBuffer
, &OrgConsoleCursorInfo
);
596 static BOOL
IsConsoleHandle(HANDLE hHandle
)
600 /* Check whether the handle may be that of a console... */
601 if ((GetFileType(hHandle
) & ~FILE_TYPE_REMOTE
) != FILE_TYPE_CHAR
)
605 * It may be. Perform another test... The idea comes from the
606 * MSDN description of the WriteConsole API:
608 * "WriteConsole fails if it is used with a standard handle
609 * that is redirected to a file. If an application processes
610 * multilingual output that can be redirected, determine whether
611 * the output handle is a console handle (one method is to call
612 * the GetConsoleMode function and check whether it succeeds).
613 * If the handle is a console handle, call WriteConsole. If the
614 * handle is not a console handle, the output is redirected and
615 * you should call WriteFile to perform the I/O."
617 return GetConsoleMode(hHandle
, &dwMode
);
620 static inline DWORD
VgaGetAddressSize(VOID
)
622 if (VgaCrtcRegisters
[VGA_CRTC_UNDERLINE_REG
] & VGA_CRTC_UNDERLINE_DWORD
)
624 /* Double-word addressing */
625 return 4; // sizeof(DWORD)
627 else if (VgaCrtcRegisters
[VGA_CRTC_MODE_CONTROL_REG
] & VGA_CRTC_MODE_CONTROL_BYTE
)
629 /* Byte addressing */
630 return 1; // sizeof(BYTE)
634 /* Word addressing */
635 return 2; // sizeof(WORD)
639 static inline DWORD
VgaTranslateReadAddress(DWORD Address
)
641 DWORD Offset
= Address
- VgaGetVideoBaseAddress();
644 /* Check for chain-4 and odd-even mode */
645 if (VgaSeqRegisters
[VGA_SEQ_MEM_REG
] & VGA_SEQ_MEM_C4
)
647 /* The lowest two bits are the plane number */
651 else if (VgaGcRegisters
[VGA_GC_MODE_REG
] & VGA_GC_MODE_OE
)
653 /* The LSB is the plane number */
659 /* Use the read mode */
660 Plane
= VgaGcRegisters
[VGA_GC_READ_MAP_SEL_REG
] & 0x03;
663 /* Multiply the offset by the address size */
664 Offset
*= VgaGetAddressSize();
666 return Offset
+ Plane
* VGA_BANK_SIZE
;
669 static inline DWORD
VgaTranslateWriteAddress(DWORD Address
)
671 DWORD Offset
= Address
- VgaGetVideoBaseAddress();
673 /* Check for chain-4 and odd-even mode */
674 if (VgaSeqRegisters
[VGA_SEQ_MEM_REG
] & VGA_SEQ_MEM_C4
)
676 /* Shift the offset to the right by 2 */
679 else if (VgaGcRegisters
[VGA_GC_MODE_REG
] & VGA_GC_MODE_OE
)
681 /* Shift the offset to the right by 1 */
685 /* Multiply the offset by the address size */
686 Offset
*= VgaGetAddressSize();
688 /* Return the offset on plane 0 */
692 static inline BYTE
VgaTranslateByteForWriting(BYTE Data
, BYTE Plane
)
694 BYTE WriteMode
= VgaGcRegisters
[VGA_GC_MODE_REG
] & 3;
695 BYTE BitMask
= VgaGcRegisters
[VGA_GC_BITMASK_REG
];
699 /* In write mode 1 just return the latch register */
700 return VgaLatchRegisters
[Plane
];
705 /* Write modes 0 and 3 rotate the data to the right first */
706 BYTE RotateCount
= VgaGcRegisters
[VGA_GC_ROTATE_REG
] & 7;
707 Data
= LOBYTE(((DWORD
)Data
>> RotateCount
) | ((DWORD
)Data
<< (8 - RotateCount
)));
711 /* Write mode 2 expands the appropriate bit to all 8 bits */
712 Data
= (Data
& (1 << Plane
)) ? 0xFF : 0x00;
718 * In write mode 0, the enable set/reset register decides if the
719 * set/reset bit should be expanded to all 8 bits.
721 if (VgaGcRegisters
[VGA_GC_ENABLE_RESET_REG
] & (1 << Plane
))
723 /* Copy the bit from the set/reset register to all 8 bits */
724 Data
= (VgaGcRegisters
[VGA_GC_RESET_REG
] & (1 << Plane
)) ? 0xFF : 0x00;
730 /* Write modes 0 and 2 then perform a logical operation on the data and latch */
731 BYTE LogicalOperation
= (VgaGcRegisters
[VGA_GC_ROTATE_REG
] >> 3) & 3;
733 if (LogicalOperation
== 1) Data
&= VgaLatchRegisters
[Plane
];
734 else if (LogicalOperation
== 2) Data
|= VgaLatchRegisters
[Plane
];
735 else if (LogicalOperation
== 3) Data
^= VgaLatchRegisters
[Plane
];
739 /* For write mode 3, we AND the bitmask with the data, which is used as the new bitmask */
742 /* Then we expand the bit in the set/reset field */
743 Data
= (VgaGcRegisters
[VGA_GC_RESET_REG
] & (1 << Plane
)) ? 0xFF : 0x00;
746 /* Bits cleared in the bitmask are replaced with latch register bits */
747 Data
= (Data
& BitMask
) | (VgaLatchRegisters
[Plane
] & (~BitMask
));
749 /* Return the byte */
753 static inline VOID
VgaMarkForUpdate(SHORT Row
, SHORT Column
)
755 /* Check if this is the first time the rectangle is updated */
758 UpdateRectangle
.Left
= UpdateRectangle
.Top
= MAXSHORT
;
759 UpdateRectangle
.Right
= UpdateRectangle
.Bottom
= MINSHORT
;
762 /* Expand the rectangle to include the point */
763 UpdateRectangle
.Left
= min(UpdateRectangle
.Left
, Column
);
764 UpdateRectangle
.Right
= max(UpdateRectangle
.Right
, Column
);
765 UpdateRectangle
.Top
= min(UpdateRectangle
.Top
, Row
);
766 UpdateRectangle
.Bottom
= max(UpdateRectangle
.Bottom
, Row
);
768 /* Set the update request flag */
772 static VOID
VgaWriteSequencer(BYTE Data
)
774 ASSERT(VgaSeqIndex
< VGA_SEQ_MAX_REG
);
777 VgaSeqRegisters
[VgaSeqIndex
] = Data
;
780 static VOID
VgaWriteGc(BYTE Data
)
782 ASSERT(VgaGcIndex
< VGA_GC_MAX_REG
);
785 VgaGcRegisters
[VgaGcIndex
] = Data
;
787 /* Check the index */
790 case VGA_GC_MISC_REG
:
792 /* The GC misc register decides if it's text or graphics mode */
799 static VOID
VgaWriteCrtc(BYTE Data
)
801 ASSERT(VgaGcIndex
< VGA_CRTC_MAX_REG
);
804 VgaCrtcRegisters
[VgaCrtcIndex
] = Data
;
806 /* Check the index */
807 switch (VgaCrtcIndex
)
809 case VGA_CRTC_END_HORZ_DISP_REG
:
810 case VGA_CRTC_VERT_DISP_END_REG
:
811 case VGA_CRTC_OVERFLOW_REG
:
813 /* The video mode has changed */
818 case VGA_CRTC_CURSOR_LOC_LOW_REG
:
819 case VGA_CRTC_CURSOR_LOC_HIGH_REG
:
820 case VGA_CRTC_CURSOR_START_REG
:
821 case VGA_CRTC_CURSOR_END_REG
:
823 /* Set the cursor moved flag */
830 static VOID
VgaWriteDac(BYTE Data
)
836 VgaDacRegisters
[VgaDacIndex
] = Data
;
838 /* Find the palette index */
839 PaletteIndex
= VgaDacIndex
/ 3;
841 /* Fill the entry structure */
842 Entry
.peRed
= VGA_DAC_TO_COLOR(VgaDacRegisters
[PaletteIndex
* 3]);
843 Entry
.peGreen
= VGA_DAC_TO_COLOR(VgaDacRegisters
[PaletteIndex
* 3 + 1]);
844 Entry
.peBlue
= VGA_DAC_TO_COLOR(VgaDacRegisters
[PaletteIndex
* 3 + 2]);
847 /* Update the palette entry and set the palette change flag */
848 SetPaletteEntries(PaletteHandle
, PaletteIndex
, 1, &Entry
);
849 PaletteChanged
= TRUE
;
851 /* Update the index */
853 VgaDacIndex
%= VGA_PALETTE_SIZE
;
856 static VOID
VgaWriteAc(BYTE Data
)
858 ASSERT(VgaAcIndex
< VGA_AC_MAX_REG
);
861 if (VgaAcIndex
<= VGA_AC_PAL_F_REG
)
863 if (VgaAcPalDisable
) return;
865 // DbgPrint(" AC Palette Writing %d to index %d\n", Data, VgaAcIndex);
866 if (VgaAcRegisters
[VgaAcIndex
] != Data
)
868 /* Update the AC register and set the palette change flag */
869 VgaAcRegisters
[VgaAcIndex
] = Data
;
870 PaletteChanged
= TRUE
;
875 VgaAcRegisters
[VgaAcIndex
] = Data
;
879 static VOID
VgaRestoreDefaultPalette(PPALETTEENTRY Entries
, USHORT NumOfEntries
)
883 /* Copy the colors of the default palette to the DAC and console palette */
884 for (i
= 0; i
< NumOfEntries
; i
++)
886 /* Set the palette entries */
887 Entries
[i
].peRed
= GetRValue(VgaDefaultPalette
[i
]);
888 Entries
[i
].peGreen
= GetGValue(VgaDefaultPalette
[i
]);
889 Entries
[i
].peBlue
= GetBValue(VgaDefaultPalette
[i
]);
890 Entries
[i
].peFlags
= 0;
892 /* Set the DAC registers */
893 VgaDacRegisters
[i
* 3] = VGA_COLOR_TO_DAC(GetRValue(VgaDefaultPalette
[i
]));
894 VgaDacRegisters
[i
* 3 + 1] = VGA_COLOR_TO_DAC(GetGValue(VgaDefaultPalette
[i
]));
895 VgaDacRegisters
[i
* 3 + 2] = VGA_COLOR_TO_DAC(GetBValue(VgaDefaultPalette
[i
]));
899 static BOOLEAN
VgaInitializePalette(VOID
)
901 LPLOGPALETTE Palette
;
903 /* Allocate storage space for the palette */
904 Palette
= (LPLOGPALETTE
)HeapAlloc(GetProcessHeap(),
907 VGA_MAX_COLORS
* sizeof(PALETTEENTRY
));
908 if (Palette
== NULL
) return FALSE
;
910 /* Initialize the palette */
911 Palette
->palVersion
= 0x0300;
912 Palette
->palNumEntries
= VGA_MAX_COLORS
;
914 /* Restore the default palette */
915 VgaRestoreDefaultPalette(Palette
->palPalEntry
, Palette
->palNumEntries
);
917 /* Create the palette */
918 PaletteHandle
= CreatePalette(Palette
);
920 /* Free the palette */
921 HeapFree(GetProcessHeap(), 0, Palette
);
923 /* Fail if the palette wasn't successfully created... */
924 if (PaletteHandle
== NULL
) return FALSE
;
926 /* ... otherwise return success */
930 static BOOL
VgaEnterGraphicsMode(PCOORD Resolution
)
933 CONSOLE_GRAPHICS_BUFFER_INFO GraphicsBufferInfo
;
934 BYTE BitmapInfoBuffer
[VGA_BITMAP_INFO_SIZE
];
935 LPBITMAPINFO BitmapInfo
= (LPBITMAPINFO
)BitmapInfoBuffer
;
936 LPWORD PaletteIndex
= (LPWORD
)(BitmapInfo
->bmiColors
);
938 LONG Width
= Resolution
->X
;
939 LONG Height
= Resolution
->Y
;
941 /* Use DoubleVision mode if the resolution is too small */
942 if (Width
< VGA_MINIMUM_WIDTH
&& Height
< VGA_MINIMUM_HEIGHT
)
950 DoubleVision
= FALSE
;
953 /* Fill the bitmap info header */
954 ZeroMemory(&BitmapInfo
->bmiHeader
, sizeof(BITMAPINFOHEADER
));
955 BitmapInfo
->bmiHeader
.biSize
= sizeof(BITMAPINFOHEADER
);
956 BitmapInfo
->bmiHeader
.biWidth
= Width
;
957 BitmapInfo
->bmiHeader
.biHeight
= Height
;
958 BitmapInfo
->bmiHeader
.biBitCount
= 8;
959 BitmapInfo
->bmiHeader
.biPlanes
= 1;
960 BitmapInfo
->bmiHeader
.biCompression
= BI_RGB
;
961 BitmapInfo
->bmiHeader
.biSizeImage
= Width
* Height
/* * 1 == biBitCount / 8 */;
963 /* Fill the palette data */
964 for (i
= 0; i
< (VGA_PALETTE_SIZE
/ 3); i
++) PaletteIndex
[i
] = (WORD
)i
;
966 /* Fill the console graphics buffer info */
967 GraphicsBufferInfo
.dwBitMapInfoLength
= VGA_BITMAP_INFO_SIZE
;
968 GraphicsBufferInfo
.lpBitMapInfo
= BitmapInfo
;
969 GraphicsBufferInfo
.dwUsage
= DIB_PAL_COLORS
;
971 /* Create the buffer */
972 GraphicsConsoleBuffer
= CreateConsoleScreenBuffer(GENERIC_READ
| GENERIC_WRITE
,
973 FILE_SHARE_READ
| FILE_SHARE_WRITE
,
975 CONSOLE_GRAPHICS_BUFFER
,
976 &GraphicsBufferInfo
);
977 if (GraphicsConsoleBuffer
== INVALID_HANDLE_VALUE
) return FALSE
;
979 /* Save the framebuffer address and mutex */
980 ConsoleFramebuffer
= GraphicsBufferInfo
.lpBitMap
;
981 ConsoleMutex
= GraphicsBufferInfo
.hMutex
;
983 /* Clear the framebuffer */
984 ZeroMemory(ConsoleFramebuffer
, BitmapInfo
->bmiHeader
.biSizeImage
);
986 /* Set the active buffer */
987 SetConsoleActiveScreenBuffer(GraphicsConsoleBuffer
);
989 /* Set the graphics mode palette */
990 SetConsolePalette(GraphicsConsoleBuffer
,
994 /* Set the screen mode flag */
995 ScreenMode
= GRAPHICS_MODE
;
1000 static VOID
VgaLeaveGraphicsMode(VOID
)
1002 /* Release the console framebuffer mutex */
1003 ReleaseMutex(ConsoleMutex
);
1005 /* Switch back to the default console text buffer */
1006 // SetConsoleActiveScreenBuffer(TextConsoleBuffer);
1008 /* Cleanup the video data */
1009 CloseHandle(ConsoleMutex
);
1010 ConsoleMutex
= NULL
;
1011 ConsoleFramebuffer
= NULL
;
1012 CloseHandle(GraphicsConsoleBuffer
);
1013 GraphicsConsoleBuffer
= NULL
;
1014 DoubleVision
= FALSE
;
1017 static BOOL
VgaEnterTextMode(PCOORD Resolution
)
1019 DPRINT1("VgaEnterTextMode\n");
1021 /* Switch to the text buffer */
1022 SetConsoleActiveScreenBuffer(TextConsoleBuffer
);
1024 /* Adjust the text framebuffer if we changed the resolution */
1025 if (TextResolution
.X
!= Resolution
->X
||
1026 TextResolution
.Y
!= Resolution
->Y
)
1028 VgaDetachFromConsole(TRUE
);
1031 * VgaAttachToConsoleInternal sets TextResolution to the
1032 * new resolution and updates ConsoleInfo.
1034 if (!VgaAttachToConsoleInternal(Resolution
))
1036 DisplayMessage(L
"An unexpected error occurred!\n");
1037 EmulatorTerminate();
1041 else VgaUpdateCursorPosition();
1043 /* The active framebuffer is now the text framebuffer */
1044 ConsoleFramebuffer
= TextFramebuffer
;
1047 * Set the text mode palette.
1049 * WARNING: This call should fail on Windows (and therefore
1050 * we get the default palette and our external behaviour is
1051 * just like Windows' one), but it should success on ReactOS
1052 * (so that we get console palette changes even for text-mode
1053 * screen-buffers, which is a new feature on ReactOS).
1055 SetConsolePalette(TextConsoleBuffer
,
1057 SYSPAL_NOSTATIC256
);
1059 /* Set the screen mode flag */
1060 ScreenMode
= TEXT_MODE
;
1065 static VOID
VgaLeaveTextMode(VOID
)
1067 /* Reset the active framebuffer */
1068 ConsoleFramebuffer
= NULL
;
1071 static VOID
VgaChangeMode(VOID
)
1073 COORD Resolution
= VgaGetDisplayResolution();
1075 if (ScreenMode
== GRAPHICS_MODE
)
1077 /* Leave the current graphics mode */
1078 VgaLeaveGraphicsMode();
1082 /* Leave the current text mode */
1086 /* Check if the new mode is alphanumeric */
1087 if (!(VgaGcRegisters
[VGA_GC_MISC_REG
] & VGA_GC_MISC_NOALPHA
))
1089 /* Enter new text mode */
1090 if (!VgaEnterTextMode(&Resolution
))
1092 DisplayMessage(L
"An unexpected VGA error occurred while switching into text mode.");
1093 EmulatorTerminate();
1099 /* Enter graphics mode */
1100 if (!VgaEnterGraphicsMode(&Resolution
))
1102 DisplayMessage(L
"An unexpected VGA error occurred while switching into graphics mode.");
1103 EmulatorTerminate();
1108 /* Trigger a full update of the screen */
1110 UpdateRectangle
.Left
= 0;
1111 UpdateRectangle
.Top
= 0;
1112 UpdateRectangle
.Right
= Resolution
.X
;
1113 UpdateRectangle
.Bottom
= Resolution
.Y
;
1115 /* Reset the mode change flag */
1116 ModeChanged
= FALSE
;
1119 static VOID
VgaUpdateFramebuffer(VOID
)
1122 COORD Resolution
= VgaGetDisplayResolution();
1123 DWORD AddressSize
= VgaGetAddressSize();
1124 DWORD Address
= MAKEWORD(VgaCrtcRegisters
[VGA_CRTC_START_ADDR_LOW_REG
],
1125 VgaCrtcRegisters
[VGA_CRTC_START_ADDR_HIGH_REG
]);
1126 DWORD ScanlineSize
= (DWORD
)VgaCrtcRegisters
[VGA_CRTC_OFFSET_REG
] * 2;
1129 * If console framebuffer is NULL, that means something went wrong
1130 * earlier and this is the final display refresh.
1132 if (ConsoleFramebuffer
== NULL
) return;
1134 /* Check if this is text mode or graphics mode */
1135 if (VgaGcRegisters
[VGA_GC_MISC_REG
] & VGA_GC_MISC_NOALPHA
)
1138 PBYTE GraphicsBuffer
= (PBYTE
)ConsoleFramebuffer
;
1141 * Synchronize access to the graphics framebuffer
1142 * with the console framebuffer mutex.
1144 WaitForSingleObject(ConsoleMutex
, INFINITE
);
1146 /* Loop through the scanlines */
1147 for (i
= 0; i
< Resolution
.Y
; i
++)
1149 BOOL RepeatScanline
= FALSE
;
1151 /* Loop through the pixels */
1152 for (j
= 0; j
< Resolution
.X
; j
++)
1156 /* Check the shifting mode */
1157 if (VgaGcRegisters
[VGA_GC_MODE_REG
] & VGA_GC_MODE_SHIFT256
)
1159 /* 4 bits shifted from each plane */
1161 /* Check if this is 16 or 256 color mode */
1162 if (VgaAcRegisters
[VGA_AC_CONTROL_REG
] & VGA_AC_CONTROL_8BIT
)
1164 /* One byte per pixel */
1165 PixelData
= VgaMemory
[(j
% VGA_NUM_BANKS
) * VGA_BANK_SIZE
1166 + (Address
+ (j
/ VGA_NUM_BANKS
))
1171 /* 4-bits per pixel */
1173 PixelData
= VgaMemory
[(j
% VGA_NUM_BANKS
) * VGA_BANK_SIZE
1174 + (Address
+ (j
/ (VGA_NUM_BANKS
* 2)))
1177 /* Check if we should use the highest 4 bits or lowest 4 */
1178 if (((j
/ VGA_NUM_BANKS
) % 2) == 0)
1190 else if (VgaGcRegisters
[VGA_GC_MODE_REG
] & VGA_GC_MODE_SHIFTREG
)
1192 /* Check if this is 16 or 256 color mode */
1193 if (VgaAcRegisters
[VGA_AC_CONTROL_REG
] & VGA_AC_CONTROL_8BIT
)
1195 // TODO: NOT IMPLEMENTED
1196 DPRINT1("8-bit interleaved mode is not implemented!\n");
1201 * 2 bits shifted from plane 0 and 2 for the first 4 pixels,
1202 * then 2 bits shifted from plane 1 and 3 for the next 4
1204 DWORD BankNumber
= (j
/ 4) % 2;
1205 DWORD Offset
= Address
+ (j
/ 8);
1206 BYTE LowPlaneData
, HighPlaneData
;
1210 /* Odd-numbered line - add the CGA emulation offset */
1211 Offset
+= VGA_CGA_ODD_LINE_OFFSET
;
1215 /* Even-numbered line - use the same scanline */
1216 RepeatScanline
= TRUE
;
1219 LowPlaneData
= VgaMemory
[BankNumber
* VGA_BANK_SIZE
+ Offset
* AddressSize
];
1220 HighPlaneData
= VgaMemory
[(BankNumber
+ 2) * VGA_BANK_SIZE
+ Offset
* AddressSize
];
1222 /* Extract the two bits from each plane */
1223 LowPlaneData
= (LowPlaneData
>> (6 - ((j
% 4) * 2))) & 3;
1224 HighPlaneData
= (HighPlaneData
>> (6 - ((j
% 4) * 2))) & 3;
1226 /* Combine them into the pixel */
1227 PixelData
= LowPlaneData
| (HighPlaneData
<< 2);
1232 /* 1 bit shifted from each plane */
1234 /* Check if this is 16 or 256 color mode */
1235 if (VgaAcRegisters
[VGA_AC_CONTROL_REG
] & VGA_AC_CONTROL_8BIT
)
1237 /* 8 bits per pixel, 2 on each plane */
1239 for (k
= 0; k
< VGA_NUM_BANKS
; k
++)
1241 /* The data is on plane k, 4 pixels per byte */
1242 BYTE PlaneData
= VgaMemory
[k
* VGA_BANK_SIZE
1243 + (Address
+ (j
/ VGA_NUM_BANKS
))
1246 /* The mask of the first bit in the pair */
1247 BYTE BitMask
= 1 << (((3 - (j
% VGA_NUM_BANKS
)) * 2) + 1);
1249 /* Bits 0, 1, 2 and 3 come from the first bit of the pair */
1250 if (PlaneData
& BitMask
) PixelData
|= 1 << k
;
1252 /* Bits 4, 5, 6 and 7 come from the second bit of the pair */
1253 if (PlaneData
& (BitMask
>> 1)) PixelData
|= 1 << (k
+ 4);
1258 /* 4 bits per pixel, 1 on each plane */
1260 for (k
= 0; k
< VGA_NUM_BANKS
; k
++)
1262 BYTE PlaneData
= VgaMemory
[k
* VGA_BANK_SIZE
1263 + (Address
+ (j
/ (VGA_NUM_BANKS
* 2)))
1266 /* If the bit on that plane is set, set it */
1267 if (PlaneData
& (1 << (7 - (j
% 8)))) PixelData
|= 1 << k
;
1272 if (!(VgaAcRegisters
[VGA_AC_CONTROL_REG
] & VGA_AC_CONTROL_8BIT
))
1275 * In 16 color mode, the value is an index to the AC registers
1276 * if external palette access is disabled, otherwise (in case
1277 * of palette loading) it is a blank pixel.
1279 PixelData
= (VgaAcPalDisable
? VgaAcRegisters
[PixelData
& 0x0F]
1283 /* Take into account DoubleVision mode when checking for pixel updates */
1286 /* Now check if the resulting pixel data has changed */
1287 if (GraphicsBuffer
[(i
* Resolution
.X
* 4) + (j
* 2)] != PixelData
)
1289 /* Yes, write the new value */
1290 GraphicsBuffer
[(i
* Resolution
.X
* 4) + (j
* 2)] = PixelData
;
1291 GraphicsBuffer
[(i
* Resolution
.X
* 4) + (j
* 2 + 1)] = PixelData
;
1292 GraphicsBuffer
[((i
* 2 + 1) * Resolution
.X
* 2) + (j
* 2)] = PixelData
;
1293 GraphicsBuffer
[((i
* 2 + 1) * Resolution
.X
* 2) + (j
* 2 + 1)] = PixelData
;
1295 /* Mark the specified pixel as changed */
1296 VgaMarkForUpdate(i
, j
);
1301 /* Now check if the resulting pixel data has changed */
1302 if (GraphicsBuffer
[i
* Resolution
.X
+ j
] != PixelData
)
1304 /* Yes, write the new value */
1305 GraphicsBuffer
[i
* Resolution
.X
+ j
] = PixelData
;
1307 /* Mark the specified pixel as changed */
1308 VgaMarkForUpdate(i
, j
);
1313 /* Move to the next scanline */
1314 if (!RepeatScanline
) Address
+= ScanlineSize
;
1318 * Release the console framebuffer mutex
1319 * so that we allow for repainting.
1321 ReleaseMutex(ConsoleMutex
);
1327 PCHAR_CELL CharBuffer
= (PCHAR_CELL
)ConsoleFramebuffer
;
1330 /* Loop through the scanlines */
1331 for (i
= 0; i
< Resolution
.Y
; i
++)
1333 /* Loop through the characters */
1334 for (j
= 0; j
< Resolution
.X
; j
++)
1336 CurrentAddr
= LOWORD((Address
+ j
) * AddressSize
);
1338 /* Plane 0 holds the character itself */
1339 CharInfo
.Char
= VgaMemory
[CurrentAddr
];
1341 /* Plane 1 holds the attribute */
1342 CharInfo
.Attributes
= VgaMemory
[CurrentAddr
+ VGA_BANK_SIZE
];
1344 /* Now check if the resulting character data has changed */
1345 if ((CharBuffer
[i
* Resolution
.X
+ j
].Char
!= CharInfo
.Char
) ||
1346 (CharBuffer
[i
* Resolution
.X
+ j
].Attributes
!= CharInfo
.Attributes
))
1348 /* Yes, write the new value */
1349 CharBuffer
[i
* Resolution
.X
+ j
] = CharInfo
;
1351 /* Mark the specified cell as changed */
1352 VgaMarkForUpdate(i
, j
);
1356 /* Move to the next scanline */
1357 Address
+= ScanlineSize
;
1362 static VOID
VgaUpdateTextCursor(VOID
)
1365 CONSOLE_CURSOR_INFO CursorInfo
;
1366 BYTE CursorStart
= VgaCrtcRegisters
[VGA_CRTC_CURSOR_START_REG
] & 0x3F;
1367 BYTE CursorEnd
= VgaCrtcRegisters
[VGA_CRTC_CURSOR_END_REG
] & 0x1F;
1368 DWORD ScanlineSize
= (DWORD
)VgaCrtcRegisters
[VGA_CRTC_OFFSET_REG
] * 2;
1369 BYTE TextSize
= 1 + (VgaCrtcRegisters
[VGA_CRTC_MAX_SCAN_LINE_REG
] & 0x1F);
1370 WORD Location
= MAKEWORD(VgaCrtcRegisters
[VGA_CRTC_CURSOR_LOC_LOW_REG
],
1371 VgaCrtcRegisters
[VGA_CRTC_CURSOR_LOC_HIGH_REG
]);
1373 /* Just return if we are not in text mode */
1374 if (VgaGcRegisters
[VGA_GC_MISC_REG
] & VGA_GC_MISC_NOALPHA
) return;
1376 if (CursorStart
< CursorEnd
)
1378 /* Visible cursor */
1379 CursorInfo
.bVisible
= TRUE
;
1380 CursorInfo
.dwSize
= (100 * (CursorEnd
- CursorStart
)) / TextSize
;
1385 CursorInfo
.bVisible
= FALSE
;
1386 CursorInfo
.dwSize
= 0;
1389 /* Add the cursor skew to the location */
1390 Location
+= (VgaCrtcRegisters
[VGA_CRTC_CURSOR_END_REG
] >> 5) & 3;
1392 /* Find the coordinates of the new position */
1393 Position
.X
= (SHORT
)(Location
% ScanlineSize
);
1394 Position
.Y
= (SHORT
)(Location
/ ScanlineSize
);
1396 DPRINT1("VgaUpdateTextCursor: X = %d ; Y = %d\n", Position
.X
, Position
.Y
);
1398 /* Update the physical cursor */
1399 SetConsoleCursorInfo(TextConsoleBuffer
, &CursorInfo
);
1400 SetConsoleCursorPosition(TextConsoleBuffer
, Position
);
1402 /* Reset the cursor move flag */
1403 CursorMoved
= FALSE
;
1406 static BYTE WINAPI
VgaReadPort(ULONG Port
)
1408 DPRINT("VgaReadPort: Port 0x%X\n", Port
);
1413 return VgaMiscRegister
;
1415 case VGA_INSTAT0_READ
:
1416 return 0; // Not implemented
1418 case VGA_INSTAT1_READ_MONO
:
1419 case VGA_INSTAT1_READ_COLOR
:
1423 /* Reset the AC latch */
1426 /* Set a flag if there is a vertical or horizontal retrace */
1427 if (InVerticalRetrace
|| InHorizontalRetrace
) Result
|= VGA_STAT_DD
;
1429 /* Set an additional flag if there was a vertical retrace */
1430 if (InVerticalRetrace
) Result
|= VGA_STAT_VRETRACE
;
1432 /* Clear the flags */
1433 InHorizontalRetrace
= InVerticalRetrace
= FALSE
;
1438 case VGA_FEATURE_READ
:
1439 return VgaFeatureRegister
;
1445 return VgaAcRegisters
[VgaAcIndex
];
1451 return VgaSeqRegisters
[VgaSeqIndex
];
1456 case VGA_DAC_READ_INDEX
:
1457 /* This returns the read/write state */
1458 return (VgaDacReadWrite
? 0 : 3);
1460 case VGA_DAC_WRITE_INDEX
:
1461 return (VgaDacIndex
/ 3);
1465 /* Ignore reads in write mode */
1466 if (!VgaDacReadWrite
)
1468 BYTE Data
= VgaDacRegisters
[VgaDacIndex
++];
1469 VgaDacIndex
%= VGA_PALETTE_SIZE
;
1476 case VGA_CRTC_INDEX_MONO
:
1477 case VGA_CRTC_INDEX_COLOR
:
1478 return VgaCrtcIndex
;
1480 case VGA_CRTC_DATA_MONO
:
1481 case VGA_CRTC_DATA_COLOR
:
1482 return VgaCrtcRegisters
[VgaCrtcIndex
];
1488 return VgaGcRegisters
[VgaGcIndex
];
1491 DPRINT1("VgaReadPort: Unknown port 0x%X\n", Port
);
1498 static VOID WINAPI
VgaWritePort(ULONG Port
, BYTE Data
)
1500 DPRINT("VgaWritePort: Port 0x%X, Data 0x%02X\n", Port
, Data
);
1504 case VGA_MISC_WRITE
:
1506 VgaMiscRegister
= Data
;
1508 if (VgaMiscRegister
& 0x01)
1510 /* Color emulation */
1511 DPRINT1("Color emulation\n");
1513 /* Register the new I/O Ports */
1514 RegisterIoPort(0x3D4, VgaReadPort
, VgaWritePort
); // VGA_CRTC_INDEX_COLOR
1515 RegisterIoPort(0x3D5, VgaReadPort
, VgaWritePort
); // VGA_CRTC_DATA_COLOR
1516 RegisterIoPort(0x3DA, VgaReadPort
, VgaWritePort
); // VGA_INSTAT1_READ_COLOR, VGA_FEATURE_WRITE_COLOR
1518 /* Unregister the old ones */
1519 UnregisterIoPort(0x3B4); // VGA_CRTC_INDEX_MONO
1520 UnregisterIoPort(0x3B5); // VGA_CRTC_DATA_MONO
1521 UnregisterIoPort(0x3BA); // VGA_INSTAT1_READ_MONO, VGA_FEATURE_WRITE_MONO
1525 /* Monochrome emulation */
1526 DPRINT1("Monochrome emulation\n");
1528 /* Register the new I/O Ports */
1529 RegisterIoPort(0x3B4, VgaReadPort
, VgaWritePort
); // VGA_CRTC_INDEX_MONO
1530 RegisterIoPort(0x3B5, VgaReadPort
, VgaWritePort
); // VGA_CRTC_DATA_MONO
1531 RegisterIoPort(0x3BA, VgaReadPort
, VgaWritePort
); // VGA_INSTAT1_READ_MONO, VGA_FEATURE_WRITE_MONO
1533 /* Unregister the old ones */
1534 UnregisterIoPort(0x3D4); // VGA_CRTC_INDEX_COLOR
1535 UnregisterIoPort(0x3D5); // VGA_CRTC_DATA_COLOR
1536 UnregisterIoPort(0x3DA); // VGA_INSTAT1_READ_COLOR, VGA_FEATURE_WRITE_COLOR
1539 // if (VgaMiscRegister & 0x02) { /* Enable RAM access */ } else { /* Disable RAM access */ }
1543 case VGA_FEATURE_WRITE_MONO
:
1544 case VGA_FEATURE_WRITE_COLOR
:
1546 VgaFeatureRegister
= Data
;
1551 // case VGA_AC_WRITE:
1555 /* Change the index */
1556 BYTE Index
= Data
& 0x1F;
1557 if (Index
< VGA_AC_MAX_REG
) VgaAcIndex
= Index
;
1560 * Change palette protection by checking for
1561 * the Palette Address Source bit.
1563 VgaAcPalDisable
= (Data
& 0x20) ? TRUE
: FALSE
;
1567 /* Write the data */
1571 /* Toggle the latch */
1572 VgaAcLatch
= !VgaAcLatch
;
1578 /* Set the sequencer index register */
1579 if (Data
< VGA_SEQ_MAX_REG
) VgaSeqIndex
= Data
;
1585 /* Call the sequencer function */
1586 VgaWriteSequencer(Data
);
1596 case VGA_DAC_READ_INDEX
:
1598 VgaDacReadWrite
= FALSE
;
1599 VgaDacIndex
= Data
* 3;
1603 case VGA_DAC_WRITE_INDEX
:
1605 VgaDacReadWrite
= TRUE
;
1606 VgaDacIndex
= Data
* 3;
1612 /* Ignore writes in read mode */
1613 if (VgaDacReadWrite
) VgaWriteDac(Data
& 0x3F);
1617 case VGA_CRTC_INDEX_MONO
:
1618 case VGA_CRTC_INDEX_COLOR
:
1620 /* Set the CRTC index register */
1621 if (Data
< VGA_CRTC_MAX_REG
) VgaCrtcIndex
= Data
;
1625 case VGA_CRTC_DATA_MONO
:
1626 case VGA_CRTC_DATA_COLOR
:
1628 /* Call the CRTC function */
1635 /* Set the GC index register */
1636 if (Data
< VGA_GC_MAX_REG
) VgaGcIndex
= Data
;
1642 /* Call the GC function */
1648 DPRINT1("VgaWritePort: Unknown port 0x%X\n", Port
);
1653 /* PUBLIC FUNCTIONS ***********************************************************/
1655 DWORD
VgaGetVideoBaseAddress(VOID
)
1657 return MemoryBase
[(VgaGcRegisters
[VGA_GC_MISC_REG
] >> 2) & 0x03];
1660 DWORD
VgaGetVideoLimitAddress(VOID
)
1662 return MemoryLimit
[(VgaGcRegisters
[VGA_GC_MISC_REG
] >> 2) & 0x03];
1665 COORD
VgaGetDisplayResolution(VOID
)
1668 BYTE MaximumScanLine
= 1 + (VgaCrtcRegisters
[VGA_CRTC_MAX_SCAN_LINE_REG
] & 0x1F);
1670 /* The low 8 bits are in the display registers */
1671 Resolution
.X
= VgaCrtcRegisters
[VGA_CRTC_END_HORZ_DISP_REG
];
1672 Resolution
.Y
= VgaCrtcRegisters
[VGA_CRTC_VERT_DISP_END_REG
];
1674 /* Set the top bits from the overflow register */
1675 if (VgaCrtcRegisters
[VGA_CRTC_OVERFLOW_REG
] & VGA_CRTC_OVERFLOW_VDE8
)
1677 Resolution
.Y
|= 1 << 8;
1679 if (VgaCrtcRegisters
[VGA_CRTC_OVERFLOW_REG
] & VGA_CRTC_OVERFLOW_VDE9
)
1681 Resolution
.Y
|= 1 << 9;
1684 /* Increase the values by 1 */
1688 if (VgaGcRegisters
[VGA_GC_MISC_REG
] & VGA_GC_MISC_NOALPHA
)
1690 /* Multiply the horizontal resolution by the 9/8 dot mode */
1691 Resolution
.X
*= (VgaSeqRegisters
[VGA_SEQ_CLOCK_REG
] & VGA_SEQ_CLOCK_98DM
)
1694 /* The horizontal resolution is halved in 8-bit mode */
1695 if (VgaAcRegisters
[VGA_AC_CONTROL_REG
] & VGA_AC_CONTROL_8BIT
) Resolution
.X
/= 2;
1698 if (VgaCrtcRegisters
[VGA_CRTC_MAX_SCAN_LINE_REG
] & VGA_CRTC_MAXSCANLINE_DOUBLE
)
1700 /* Halve the vertical resolution */
1705 /* Divide the vertical resolution by the maximum scan line (== font size in text mode) */
1706 Resolution
.Y
/= MaximumScanLine
;
1709 /* Return the resolution */
1713 VOID
VgaRefreshDisplay(VOID
)
1715 HANDLE ConsoleBufferHandle
= NULL
;
1718 /* Set the vertical retrace flag */
1719 InVerticalRetrace
= TRUE
;
1721 /* If nothing has changed, just return */
1722 // if (!ModeChanged && !CursorMoved && !PaletteChanged && !NeedsUpdate)
1725 /* Change the display mode */
1726 if (ModeChanged
) VgaChangeMode();
1728 /* Change the text cursor location */
1729 if (CursorMoved
) VgaUpdateTextCursor();
1731 /* Retrieve the current resolution */
1732 Resolution
= VgaGetDisplayResolution();
1736 /* Trigger a full update of the screen */
1738 UpdateRectangle
.Left
= 0;
1739 UpdateRectangle
.Top
= 0;
1740 UpdateRectangle
.Right
= Resolution
.X
;
1741 UpdateRectangle
.Bottom
= Resolution
.Y
;
1743 PaletteChanged
= FALSE
;
1746 /* Update the contents of the framebuffer */
1747 VgaUpdateFramebuffer();
1749 /* Ignore if there's nothing to update */
1750 if (!NeedsUpdate
) return;
1752 DPRINT("Updating screen rectangle (%d, %d, %d, %d)\n",
1753 UpdateRectangle
.Left
,
1754 UpdateRectangle
.Top
,
1755 UpdateRectangle
.Right
,
1756 UpdateRectangle
.Bottom
);
1758 /* Check if this is text mode or graphics mode */
1759 if (VgaGcRegisters
[VGA_GC_MISC_REG
] & VGA_GC_MISC_NOALPHA
)
1762 ConsoleBufferHandle
= GraphicsConsoleBuffer
;
1764 /* In DoubleVision mode, scale the update rectangle */
1767 UpdateRectangle
.Left
*= 2;
1768 UpdateRectangle
.Top
*= 2;
1769 UpdateRectangle
.Right
= UpdateRectangle
.Right
* 2 + 1;
1770 UpdateRectangle
.Bottom
= UpdateRectangle
.Bottom
* 2 + 1;
1776 ConsoleBufferHandle
= TextConsoleBuffer
;
1779 /* Redraw the screen */
1780 __InvalidateConsoleDIBits(ConsoleBufferHandle
, &UpdateRectangle
);
1782 /* Clear the update flag */
1783 NeedsUpdate
= FALSE
;
1786 VOID
VgaHorizontalRetrace(VOID
)
1789 InHorizontalRetrace
= TRUE
;
1792 VOID
VgaReadMemory(DWORD Address
, LPBYTE Buffer
, DWORD Size
)
1797 DPRINT("VgaReadMemory: Address 0x%08X, Size %lu\n", Address
, Size
);
1799 /* Ignore if video RAM access is disabled */
1800 if ((VgaMiscRegister
& VGA_MISC_RAM_ENABLED
) == 0) return;
1802 /* Loop through each byte */
1803 for (i
= 0; i
< Size
; i
++)
1805 VideoAddress
= VgaTranslateReadAddress(Address
+ i
);
1807 /* Load the latch registers */
1808 VgaLatchRegisters
[0] = VgaMemory
[LOWORD(VideoAddress
)];
1809 VgaLatchRegisters
[1] = VgaMemory
[VGA_BANK_SIZE
+ LOWORD(VideoAddress
)];
1810 VgaLatchRegisters
[2] = VgaMemory
[(2 * VGA_BANK_SIZE
) + LOWORD(VideoAddress
)];
1811 VgaLatchRegisters
[3] = VgaMemory
[(3 * VGA_BANK_SIZE
) + LOWORD(VideoAddress
)];
1813 /* Copy the value to the buffer */
1814 Buffer
[i
] = VgaMemory
[VideoAddress
];
1818 VOID
VgaWriteMemory(DWORD Address
, LPBYTE Buffer
, DWORD Size
)
1823 DPRINT("VgaWriteMemory: Address 0x%08X, Size %lu\n", Address
, Size
);
1825 /* Ignore if video RAM access is disabled */
1826 if ((VgaMiscRegister
& VGA_MISC_RAM_ENABLED
) == 0) return;
1828 /* Also ignore if write access to all planes is disabled */
1829 if ((VgaSeqRegisters
[VGA_SEQ_MASK_REG
] & 0x0F) == 0x00) return;
1831 /* Loop through each byte */
1832 for (i
= 0; i
< Size
; i
++)
1834 VideoAddress
= VgaTranslateWriteAddress(Address
+ i
);
1836 for (j
= 0; j
< VGA_NUM_BANKS
; j
++)
1838 /* Make sure the page is writeable */
1839 if (!(VgaSeqRegisters
[VGA_SEQ_MASK_REG
] & (1 << j
))) continue;
1841 /* Check if this is chain-4 mode */
1842 if (VgaSeqRegisters
[VGA_SEQ_MEM_REG
] & VGA_SEQ_MEM_C4
)
1844 if (((Address
+ i
) & 3) != j
)
1846 /* This plane will not be accessed */
1851 /* Check if this is odd-even mode */
1852 if (VgaGcRegisters
[VGA_GC_MODE_REG
] & VGA_GC_MODE_OE
)
1854 if (((Address
+ i
) & 1) != (j
& 1))
1856 /* This plane will not be accessed */
1861 /* Copy the value to the VGA memory */
1862 VgaMemory
[VideoAddress
+ j
* VGA_BANK_SIZE
] = VgaTranslateByteForWriting(Buffer
[i
], j
);
1867 VOID
VgaClearMemory(VOID
)
1869 ZeroMemory(VgaMemory
, sizeof(VgaMemory
));
1872 VOID
VgaResetPalette(VOID
)
1874 PALETTEENTRY Entries
[VGA_MAX_COLORS
];
1876 /* Restore the default palette */
1877 VgaRestoreDefaultPalette(Entries
, VGA_MAX_COLORS
);
1878 SetPaletteEntries(PaletteHandle
, 0, VGA_MAX_COLORS
, Entries
);
1879 PaletteChanged
= TRUE
;
1882 BOOLEAN
VgaInitialize(HANDLE TextHandle
)
1884 /* Save the default text-mode console output handle */
1885 if (!IsConsoleHandle(TextHandle
)) return FALSE
;
1886 TextConsoleBuffer
= TextHandle
;
1888 /* Save the original cursor and console screen buffer information */
1889 if (!GetConsoleCursorInfo(TextConsoleBuffer
, &OrgConsoleCursorInfo
) ||
1890 !GetConsoleScreenBufferInfo(TextConsoleBuffer
, &OrgConsoleBufferInfo
))
1894 ConsoleInfo
= OrgConsoleBufferInfo
;
1896 /* Initialize the VGA palette and fail if it isn't successfully created */
1897 if (!VgaInitializePalette()) return FALSE
;
1898 /***/ VgaResetPalette(); /***/
1900 /* Switch to the text buffer */
1901 SetConsoleActiveScreenBuffer(TextConsoleBuffer
);
1903 /* Clear the VGA memory */
1906 /* Register the I/O Ports */
1907 RegisterIoPort(0x3CC, VgaReadPort
, NULL
); // VGA_MISC_READ
1908 RegisterIoPort(0x3C2, VgaReadPort
, VgaWritePort
); // VGA_MISC_WRITE, VGA_INSTAT0_READ
1909 RegisterIoPort(0x3CA, VgaReadPort
, NULL
); // VGA_FEATURE_READ
1910 RegisterIoPort(0x3C0, VgaReadPort
, VgaWritePort
); // VGA_AC_INDEX, VGA_AC_WRITE
1911 RegisterIoPort(0x3C1, VgaReadPort
, NULL
); // VGA_AC_READ
1912 RegisterIoPort(0x3C4, VgaReadPort
, VgaWritePort
); // VGA_SEQ_INDEX
1913 RegisterIoPort(0x3C5, VgaReadPort
, VgaWritePort
); // VGA_SEQ_DATA
1914 RegisterIoPort(0x3C6, VgaReadPort
, VgaWritePort
); // VGA_DAC_MASK
1915 RegisterIoPort(0x3C7, VgaReadPort
, VgaWritePort
); // VGA_DAC_READ_INDEX
1916 RegisterIoPort(0x3C8, VgaReadPort
, VgaWritePort
); // VGA_DAC_WRITE_INDEX
1917 RegisterIoPort(0x3C9, VgaReadPort
, VgaWritePort
); // VGA_DAC_DATA
1918 RegisterIoPort(0x3CE, VgaReadPort
, VgaWritePort
); // VGA_GC_INDEX
1919 RegisterIoPort(0x3CF, VgaReadPort
, VgaWritePort
); // VGA_GC_DATA
1921 /* Return success */
1925 VOID
VgaCleanup(VOID
)
1927 if (ScreenMode
== GRAPHICS_MODE
)
1929 /* Leave the current graphics mode */
1930 VgaLeaveGraphicsMode();
1934 /* Leave the current text mode */
1938 VgaDetachFromConsole(FALSE
);
1940 CloseHandle(AnotherEvent
);
1941 CloseHandle(EndEvent
);
1942 CloseHandle(StartEvent
);
1945 RegisterConsoleVDM
= NULL
;
1946 FreeLibrary(hKernel32
);