1 | // ============================================================================================
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2 | /*
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3 | * vgabios.c
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4 | */
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5 | // ============================================================================================
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6 | //
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7 | // Copyright (C) 2001,2002 the LGPL VGABios developers Team
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8 | //
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9 | // This library is free software; you can redistribute it and/or
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10 | // modify it under the terms of the GNU Lesser General Public
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11 | // License as published by the Free Software Foundation; either
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12 | // version 2 of the License, or (at your option) any later version.
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13 | //
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14 | // This library is distributed in the hope that it will be useful,
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15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 | // Lesser General Public License for more details.
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18 | //
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19 | // You should have received a copy of the GNU Lesser General Public
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20 | // License along with this library; if not, write to the Free Software
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21 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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22 | //
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23 | // ============================================================================================
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24 | //
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25 | // This VGA Bios is specific to the plex86/bochs Emulated VGA card.
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26 | // You can NOT drive any physical vga card with it.
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27 | //
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28 | // ============================================================================================
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29 | //
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30 | // This file contains code ripped from :
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31 | // - rombios.c of plex86
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32 | //
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33 | // This VGA Bios contains fonts from :
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34 | // - fntcol16.zip (c) by Joseph Gil avalable at :
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35 | // ftp://ftp.simtel.net/pub/simtelnet/msdos/screen/fntcol16.zip
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36 | // These fonts are public domain
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37 | //
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38 | // This VGA Bios is based on information taken from :
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39 | // - Kevin Lawton's vga card emulation for bochs/plex86
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40 | // - Ralf Brown's interrupts list available at http://www.cs.cmu.edu/afs/cs/user/ralf/pub/WWW/files.html
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41 | // - Finn Thogersons' VGADOC4b available at http://home.worldonline.dk/~finth/
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42 | // - Michael Abrash's Graphics Programming Black Book
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43 | // - Francois Gervais' book "programmation des cartes graphiques cga-ega-vga" edited by sybex
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44 | // - DOSEMU 1.0.1 source code for several tables values and formulas
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45 | //
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46 | // Thanks for patches, comments and ideas to :
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47 | // - techt@pikeonline.net
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48 | //
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49 | // ============================================================================================
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50 |
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51 |
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52 | /*
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53 | * Oracle LGPL Disclaimer: For the avoidance of doubt, except that if any license choice
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54 | * other than GPL or LGPL is available it will apply instead, Oracle elects to use only
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55 | * the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where
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56 | * a choice of LGPL license versions is made available with the language indicating
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57 | * that LGPLv2 or any later version may be used, or where a choice of which version
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58 | * of the LGPL is applied is otherwise unspecified.
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59 | */
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60 |
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61 | #include <inttypes.h>
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62 | #include "vgabios.h"
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63 |
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64 | #ifdef VBE
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65 | #include "vbe.h"
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66 | #endif
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67 |
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68 | #include "inlines.h"
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69 |
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70 | /* Declares */
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71 | extern void vgabios_int10_handler(void);
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72 | #pragma aux vgabios_int10_handler "*";
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73 |
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74 | // Output
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75 | void __cdecl unimplemented(void);
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76 | void __cdecl unknown(void);
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77 |
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78 | static uint8_t find_vga_entry();
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79 |
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80 | extern uint8_t readx_byte(uint16_t seg, uint16_t offset);
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81 |
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82 | #ifdef VBE
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83 | extern uint16_t __cdecl vbe_has_vbe_display(void);
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84 | extern void vbe_init(void);
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85 | #endif
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86 |
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87 | void set_int_vector(uint8_t int_vec, void __far *ptr)
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88 | {
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89 | void __far * __far *ivt = 0;
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90 |
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91 | ivt[int_vec] = ptr;
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92 | }
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93 |
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94 | //@todo!!
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95 | #if 0
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96 |
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97 | vgabios_name:
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98 | #ifdef VBOX
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99 | .ascii "VirtualBox VGA BIOS"
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100 | #else
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101 | .ascii "Plex86/Bochs VGABios"
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102 | #endif
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103 | .ascii " "
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104 | .byte 0x00
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105 |
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106 | #ifndef VBOX
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107 | vgabios_version:
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108 | #ifndef VGABIOS_VERS
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109 | .ascii "current-cvs"
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110 | #else
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111 | .ascii VGABIOS_VERS
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112 | #endif
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113 | .ascii " "
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114 |
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115 | vgabios_date:
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116 | .ascii VGABIOS_DATE
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117 | .byte 0x0a,0x0d
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118 | .byte 0x00
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119 | #endif
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120 |
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121 | #ifndef VBOX
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122 | char vgabios_copyright[] = "(C) 2003 the LGPL VGABios developers Team\r\n";
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123 | char vgabios_license[] = "This VGA/VBE Bios is released under the GNU LGPL\r\n\r\n";
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124 | char vgabios_website[] = "Please visit :\r\n" \
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125 | " . http://www.plex86.org\r\n" \
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126 | " . http://bochs.sourceforge.net\r\n" \
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127 | " . http://www.nongnu.org/vgabios\r\n\r\n"
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128 | #endif
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129 |
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130 | #endif
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131 |
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132 | extern void set_mode(int mode);
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133 | #pragma aux set_mode = \
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134 | "xor ah, ah" \
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135 | "int 10h" \
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136 | parm [ax];
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137 |
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138 | char msg_vga_init[] = VBOX_PRODUCT " Version " VBOX_VERSION_STRING " VGA BIOS\r\n";
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139 |
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140 | /*
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141 | * Boot time harware inits
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142 | */
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143 | void init_vga_card(void)
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144 | {
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145 | /* Switch to color mode and enable CPU access 480 lines. */
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146 | outb(0x3C2, 0xC3);
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147 | /* More than 64k 3C4/04. */
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148 | /// @todo 16-bit write
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149 | outb(0x3C4, 0x04);
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150 | outb(0x3C5, 0x02);
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151 |
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152 | #ifdef DEBUG_VGA
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153 | printf(msg_vga_init);
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154 | #endif
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155 | }
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156 |
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157 | #include "vgatables.h"
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158 | #include "vgadefs.h"
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159 |
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160 | // --------------------------------------------------------------------------------------------
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161 |
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162 | #pragma pack(0)
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163 |
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164 | /* Alphanumeric character set override. */
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165 | typedef struct {
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166 | uint8_t c_height; /* Bytes/lines per character. */
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167 | uint8_t cgen_bank; /* Character generator bank. */
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168 | uint16_t char_num; /* Number of chars defined. */
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169 | uint16_t char_1st; /* First char code in table. */
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170 | uint16_t font_ofs; /* Font definition table offset. */
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171 | uint16_t font_seg; /* Font definition table segment. */
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172 | uint8_t n_rows; /* Number of text rows shown. */
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173 | uint8_t modes[1]; /* Applicable modes list, 0xFF terminated. */
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174 | } cso_txt;
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175 |
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176 | /* Graphics character set override. */
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177 | typedef struct {
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178 | uint8_t c_height; /* Lines per character. */
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179 | uint16_t c_len; /* Bytes per character. */
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180 | uint16_t font_ofs; /* Font definition table offset. */
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181 | uint16_t font_seg; /* Font definition table segment. */
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182 | uint8_t modes[1]; /* Applicable modes list, 0xFF terminated. */
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183 | } cso_grf;
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184 |
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185 | struct dcc {
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186 | uint8_t n_ent;
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187 | uint8_t version;
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188 | uint8_t max_code;
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189 | uint8_t reserved;
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190 | uint16_t dccs[16];
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191 | } dcc_table = {
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192 | 16,
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193 | 1,
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194 | 7,
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195 | 0
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196 | };
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197 |
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198 | struct ssa {
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199 | uint16_t size;
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200 | void __far *dcc;
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201 | void __far *sacs;
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202 | void __far *pal;
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203 | void __far *resvd[3];
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204 |
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205 | } secondary_save_area = {
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206 | sizeof(struct ssa),
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207 | &dcc_table
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208 | };
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209 |
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210 | void __far *video_save_pointer_table[7] = {
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211 | &video_param_table,
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212 | 0,
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213 | 0,
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214 | 0,
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215 | &secondary_save_area
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216 | };
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217 |
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218 | /*
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219 | * Boot time bios area inits
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220 | */
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221 | void init_bios_area(void)
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222 | {
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223 | uint8_t __far *bda;
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224 |
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225 | bda = 0x40 :> 0;
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226 |
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227 | /* Indicate 80x25 color was detected. */
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228 | bda[BIOSMEM_INITIAL_MODE] = (bda[BIOSMEM_INITIAL_MODE] & 0xcf) | 0x20;
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229 | /* Just for the first int10 find its children. */
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230 |
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231 | /* The default char height. */
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232 | bda[BIOSMEM_CHAR_HEIGHT] = 16;
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233 | /* Clear the screen. */
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234 | bda[BIOSMEM_VIDEO_CTL] = 0x60;
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235 | /* Set the basic screen we have. */
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236 | bda[BIOSMEM_SWITCHES] = 0xf9;
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237 | /* Set the basic mode set options. */
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238 | bda[BIOSMEM_MODESET_CTL] = 0x51;
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239 | /* Set the default MSR. */
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240 | bda[BIOSMEM_CURRENT_MSR] = 0x09;
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241 | /* Initialize the default save area pointer. */
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242 | *(void __far * __far *)&bda[BIOSMEM_VS_POINTER] = video_save_pointer_table;
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243 | }
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244 |
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245 | // ============================================================================================
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246 | //
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247 | // Init Entry point
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248 | //
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249 | // ============================================================================================
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250 | void __far __cdecl vgabios_init_func(void)
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251 | {
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252 | init_vga_card();
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253 | init_bios_area();
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254 | #ifdef VBE
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255 | vbe_init();
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256 | #endif
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257 | set_int_vector(0x10, vgabios_int10_handler);
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258 | set_int_vector(0x6D, vgabios_int10_handler);
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259 | #ifdef CIRRUS
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260 | cirrus_init();
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261 | #endif
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262 |
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263 | #ifndef VBOX
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264 | display_splash_screen();
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265 |
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266 | // init video mode and clear the screen
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267 | // @@AS: Do not remove this init, because it will break VESA graphics
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268 | set_mode(3);
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269 |
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270 | display_info();
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271 |
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272 | #ifdef VBE
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273 | vbe_display_info();
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274 | #endif
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275 |
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276 | #ifdef CIRRUS
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277 | cirrus_display_info();
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278 | #endif
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279 |
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280 | #else /* VBOX */
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281 |
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282 | //#ifdef DEBUG_bird
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283 | /* Init video mode and clear the screen */
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284 | set_mode(3);
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285 | //#endif
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286 | #endif /* VBOX */
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287 | }
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288 |
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289 | #include "vgafonts.h"
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290 |
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291 | #ifndef VBOX
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292 | // --------------------------------------------------------------------------------------------
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293 | /*
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294 | * Boot time Splash screen
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295 | */
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296 | static void display_splash_screen()
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297 | {
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298 | }
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299 |
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300 | // --------------------------------------------------------------------------------------------
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301 | /*
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302 | * Tell who we are
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303 | */
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304 |
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305 | static void display_string(void)
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306 | {
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307 | // Get length of string
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308 | ASM_START
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309 | mov ax,ds
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310 | mov es,ax
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311 | mov di,si
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312 | xor cx,cx
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313 | not cx
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314 | xor al,al
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315 | cld
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316 | repne
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317 | scasb
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318 | not cx
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319 | dec cx
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320 | push cx
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321 |
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322 | mov ax,#0x0300
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323 | mov bx,#0x0000
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324 | int #0x10
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325 |
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326 | pop cx
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327 | mov ax,#0x1301
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328 | mov bx,#0x000b
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329 | mov bp,si
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330 | int #0x10
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331 | ASM_END
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332 | }
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333 |
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334 | static void display_info(void)
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335 | {
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336 | display_string(vgabios_name);
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337 | display_string(vgabios_version);
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338 | display_string(vgabios_copyright);
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339 | display_string(vgabios_license);
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340 | display_string(vgabios_website);
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341 | }
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342 |
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343 | #endif
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344 |
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345 | // --------------------------------------------------------------------------------------------
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346 | #ifdef VGA_DEBUG
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347 | void __cdecl int10_debugmsg(uint16_t DI, uint16_t SI, uint16_t BP, uint16_t SP, uint16_t BX,
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348 | uint16_t DX, uint16_t CX, uint16_t AX, uint16_t DS, uint16_t ES, uint16_t FLAGS)
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349 | {
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350 | /* Function 0Eh is write char and would generate way too much output. */
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351 | if (GET_AH() != 0x0E)
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352 | printf("vgabios call ah%02x al%02x bx%04x cx%04x dx%04x\n", GET_AH(), GET_AL(), BX, CX, DX);
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353 | }
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354 | #endif
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355 |
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356 | static void vga_get_cursor_pos(uint8_t page, uint16_t STACK_BASED *scans, uint16_t STACK_BASED *loc)
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357 | {
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358 | if (page > 7) {
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359 | *scans = 0;
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360 | *loc = 0;
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361 | } else {
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362 | // FIXME should handle VGA 14/16 lines
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363 | *scans = read_word(BIOSMEM_SEG,BIOSMEM_CURSOR_TYPE);
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364 | *loc = read_word(BIOSMEM_SEG,BIOSMEM_CURSOR_POS + page * 2);
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365 | }
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366 | }
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367 |
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368 | /* Look for a glyph bitmap in a given font. */
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369 | static uint16_t vga_find_glyph(uint8_t __far *font, uint8_t STACK_BASED *glyph, uint8_t cp, uint16_t n_glyphs, uint8_t cheight)
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370 | {
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371 | uint16_t codepoint = 0; /* Zero returned when glyph not found. */
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372 |
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373 | while (n_glyphs--) {
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374 | if (!repe_cmpsb(font, glyph, cheight)) {
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375 | codepoint = cp | 0x8000; /* Found matching glyph! */
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376 | break;
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377 | }
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378 | font += cheight;
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379 | ++cp; /* Increment code point number. */
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380 | }
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381 | return codepoint;
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382 | }
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383 |
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384 | static void vga_read_glyph_planar(uint8_t __far *vptr, uint16_t stride, uint8_t STACK_BASED *glyph, uint8_t cheight)
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385 | {
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386 | /* Set Mode Register (GR5) to Read Mode 1. Assuming default register
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387 | * state from our mode set, this does all the hard work for us such that
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388 | * reading a byte from video memory gives us a bit mask for all eight
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389 | * pixels, for both 16-color and monochrome modes.
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390 | */
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391 | outw(VGAREG_GRDC_ADDRESS, 0x0805);
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392 |
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393 | while (cheight--) {
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394 | *glyph++ = ~*vptr;
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395 | vptr += stride;
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396 | }
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397 |
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398 | /* Put GR5 back to Read Mode 0. */
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399 | outw(VGAREG_GRDC_ADDRESS, 0x0005);
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400 | }
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401 |
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402 | static uint16_t vga_char_ofs_planar(uint8_t xcurs, uint8_t ycurs, uint16_t nbcols, uint8_t page, uint8_t cheight)
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403 | {
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404 | uint16_t ofs;
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405 |
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406 | ofs = ycurs * nbcols * cheight + xcurs;
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407 | ofs += page * read_word(BIOSMEM_SEG, BIOSMEM_PAGE_SIZE);
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408 |
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409 | return ofs;
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410 | }
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411 |
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412 | static uint8_t vga_read_char_planar(uint16_t nbcols, uint16_t ofs, uint8_t cheight)
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413 | {
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414 | uint8_t glyph[16]; /* NB: Don't try taller characters! */
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415 |
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416 | vga_read_glyph_planar(0xA000 :> (uint8_t *)ofs, nbcols, &glyph, cheight);
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417 |
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418 | /* Look through font pointed to by INT 43h. */
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419 | return vga_find_glyph((void __far *)read_dword(0, 0x43 * 4), &glyph, 0, 256, cheight);
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420 | }
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421 |
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422 | static uint16_t vga_char_ofs_linear(uint8_t xcurs, uint8_t ycurs, uint16_t nbcols, uint8_t page, uint8_t cheight)
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423 | {
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424 | uint16_t ofs;
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425 |
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426 | ofs = ycurs * nbcols * cheight + xcurs;
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427 | ofs *= 8;
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428 | return ofs;
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429 | }
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430 |
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431 | static void vga_read_glyph_linear(uint8_t __far *vptr, uint16_t stride, uint8_t STACK_BASED *glyph, uint8_t cheight)
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432 | {
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433 | uint8_t bmap, cbit;
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434 | int i;
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435 |
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436 | /* Zero pixels are background, everything else foreground. */
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437 | while (cheight--) {
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438 | bmap = 0;
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439 | cbit = 0x80;
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440 | for (i = 0; i < 8; ++i) {
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441 | if (vptr[i])
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442 | bmap |= cbit;
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443 | cbit >>= 1;
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444 | }
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445 | *glyph++ = bmap;
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446 | vptr += stride;
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447 | }
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448 | }
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449 |
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450 | static uint8_t vga_read_char_linear(uint16_t nbcols, uint16_t ofs, uint8_t cheight)
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451 | {
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452 | uint8_t glyph[16]; /* NB: Don't try taller characters! */
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453 |
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454 | vga_read_glyph_linear(0xA000 :> (uint8_t *)ofs, nbcols * 8, &glyph, cheight);
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455 |
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456 | /* Look through font pointed to by INT 43h. */
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457 | return vga_find_glyph((void __far *)read_dword(0, 0x43 * 4), &glyph, 0, 256, cheight);
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458 | }
|
---|
459 |
|
---|
460 | static uint8_t vga_read_2bpp_char(uint8_t __far *vptr)
|
---|
461 | {
|
---|
462 | uint16_t mask, pixb;
|
---|
463 | uint8_t bmap, cbit;
|
---|
464 | int i;
|
---|
465 |
|
---|
466 | mask = 0xC000; /* Check two bits at a time to see if they're zero. */
|
---|
467 | cbit = 0x80; /* Go from left to right. */
|
---|
468 | bmap = 0;
|
---|
469 | pixb = swap_16(*((uint16_t __far *)vptr));
|
---|
470 | /* Go through 8 lines/words. */
|
---|
471 | for (i = 0; i < 8; ++i) {
|
---|
472 | if (pixb & mask)
|
---|
473 | bmap |= cbit;
|
---|
474 | cbit >>= 1;
|
---|
475 | mask >>= 2;
|
---|
476 | }
|
---|
477 | return bmap;
|
---|
478 | }
|
---|
479 |
|
---|
480 | static void vga_read_glyph_cga(uint16_t ofs, uint8_t STACK_BASED *glyph, uint8_t mode)
|
---|
481 | {
|
---|
482 | int i;
|
---|
483 | uint8_t __far *vptr;
|
---|
484 |
|
---|
485 | /* The font size is fixed at 8x8. Stride is always 80 bytes because the
|
---|
486 | * mode is either 80 characters wide at 1bpp or 40 characters at 2bpp.
|
---|
487 | */
|
---|
488 | if (mode != 6) {
|
---|
489 | /* Adjust offset for 2bpp. */
|
---|
490 | vptr = 0xB800 :> (uint8_t *)(ofs * 2);
|
---|
491 | /* For 2bpp modes, we have to extract the bits by hand. */
|
---|
492 | for (i = 0; i < 4; ++i) {
|
---|
493 | *glyph++ = vga_read_2bpp_char(vptr);
|
---|
494 | *glyph++ = vga_read_2bpp_char(vptr + 0x2000);
|
---|
495 | vptr += 80;
|
---|
496 | }
|
---|
497 | } else {
|
---|
498 | vptr = 0xB800 :> (uint8_t *)ofs;
|
---|
499 | for (i = 0; i < 4; ++i) {
|
---|
500 | *glyph++ = vptr[0];
|
---|
501 | *glyph++ = vptr[0x2000];
|
---|
502 | vptr += 80;
|
---|
503 | }
|
---|
504 | }
|
---|
505 | }
|
---|
506 |
|
---|
507 | static uint16_t vga_char_ofs_cga(uint8_t xcurs, uint8_t ycurs, uint16_t nbcols)
|
---|
508 | {
|
---|
509 | /* Multiply ony by 8 due to line interleaving. NB: Caller
|
---|
510 | * has to multiply the result for two for 2bpp mode.
|
---|
511 | */
|
---|
512 | return ycurs * nbcols * 4 + xcurs;
|
---|
513 | }
|
---|
514 |
|
---|
515 | static uint8_t vga_read_char_cga(uint16_t ofs, uint8_t mode)
|
---|
516 | {
|
---|
517 | uint8_t glyph[8]; /* Char height is hardcoded to 8. */
|
---|
518 | uint16_t found;
|
---|
519 |
|
---|
520 | /* Segment would be B000h for mono modes; we don't do those. */
|
---|
521 | vga_read_glyph_cga(ofs, &glyph, mode);
|
---|
522 |
|
---|
523 | /* Look through the first half of the font pointed to by INT 43h. */
|
---|
524 | found = vga_find_glyph((void __far *)read_dword(0, 0x43 * 4), &glyph, 0, 128, 8);
|
---|
525 | /* If not found, look for the second half pointed to by INT 1Fh */
|
---|
526 | if (!(found & 0x8000)) {
|
---|
527 | void __far *int1f;
|
---|
528 |
|
---|
529 | int1f = (void __far *)read_dword(0, 0x1f * 4);
|
---|
530 | if (int1f) /* If null pointer, skip. */
|
---|
531 | found = vga_find_glyph(int1f, &glyph, 128, 128, 8);
|
---|
532 | }
|
---|
533 | return found;
|
---|
534 | }
|
---|
535 |
|
---|
536 | static void vga_read_char_attr(uint8_t page, uint16_t STACK_BASED *chr_atr)
|
---|
537 | {
|
---|
538 | uint8_t xcurs, ycurs, mode, line, cheight;
|
---|
539 | uint16_t nbcols, nbrows, address;
|
---|
540 | uint16_t cursor, dummy, ofs;
|
---|
541 |
|
---|
542 | // Get the mode
|
---|
543 | mode = read_byte(BIOSMEM_SEG, BIOSMEM_CURRENT_MODE);
|
---|
544 | line = find_vga_entry(mode);
|
---|
545 | if (line == 0xFF)
|
---|
546 | return;
|
---|
547 |
|
---|
548 | // Get the cursor pos for the page
|
---|
549 | vga_get_cursor_pos(page, &dummy, &cursor);
|
---|
550 | xcurs = cursor & 0x00ff;
|
---|
551 | ycurs = (cursor & 0xff00) >> 8;
|
---|
552 |
|
---|
553 | // Get the dimensions
|
---|
554 | nbrows = read_byte(BIOSMEM_SEG, BIOSMEM_NB_ROWS) + 1;
|
---|
555 | nbcols = read_word(BIOSMEM_SEG, BIOSMEM_NB_COLS);
|
---|
556 |
|
---|
557 | if (vga_modes[line].class == TEXT) {
|
---|
558 | // Compute the address
|
---|
559 | address = SCREEN_MEM_START(nbcols, nbrows, page) + (xcurs + ycurs * nbcols) * 2;
|
---|
560 | *chr_atr = read_word(vga_modes[line].sstart, address);
|
---|
561 | } else {
|
---|
562 | switch (vga_modes[line].memmodel) {
|
---|
563 | case CGA:
|
---|
564 | /* For CGA graphics, font size is hardcoded at 8x8. */
|
---|
565 | ofs = vga_char_ofs_cga(xcurs, ycurs, nbcols);
|
---|
566 | *chr_atr = vga_read_char_cga(ofs, mode);
|
---|
567 | break;
|
---|
568 | case PLANAR1:
|
---|
569 | case PLANAR4:
|
---|
570 | cheight = read_word(BIOSMEM_SEG, BIOSMEM_CHAR_HEIGHT);
|
---|
571 | ofs = vga_char_ofs_planar(xcurs, ycurs, nbcols, page, cheight);
|
---|
572 | *chr_atr = vga_read_char_planar(nbcols, ofs, cheight);
|
---|
573 | break;
|
---|
574 | case LINEAR8:
|
---|
575 | cheight = read_word(BIOSMEM_SEG, BIOSMEM_CHAR_HEIGHT);
|
---|
576 | ofs = vga_char_ofs_linear(xcurs, ycurs, nbcols, page, cheight);
|
---|
577 | *chr_atr = vga_read_char_linear(nbcols, ofs, cheight);
|
---|
578 | break;
|
---|
579 | default:
|
---|
580 | #ifdef VGA_DEBUG
|
---|
581 | unimplemented();
|
---|
582 | #endif
|
---|
583 | break;
|
---|
584 | }
|
---|
585 | }
|
---|
586 | }
|
---|
587 |
|
---|
588 | static void vga_get_font_info (uint16_t func, uint16_t STACK_BASED *u_seg, uint16_t STACK_BASED *u_ofs,
|
---|
589 | uint16_t STACK_BASED *c_height, uint16_t STACK_BASED *max_row)
|
---|
590 | {
|
---|
591 | void __far *ptr;
|
---|
592 |
|
---|
593 | switch (func) {
|
---|
594 | case 0x00:
|
---|
595 | ptr = (void __far *)read_dword(0x00, 0x1f * 4);
|
---|
596 | break;
|
---|
597 | case 0x01:
|
---|
598 | ptr = (void __far *)read_dword(0x00, 0x43 * 4);
|
---|
599 | break;
|
---|
600 | case 0x02:
|
---|
601 | ptr = vgafont14;
|
---|
602 | break;
|
---|
603 | case 0x03:
|
---|
604 | ptr = vgafont8;
|
---|
605 | break;
|
---|
606 | case 0x04:
|
---|
607 | ptr = vgafont8 + 128 * 8;
|
---|
608 | break;
|
---|
609 | case 0x05:
|
---|
610 | ptr = vgafont14alt;
|
---|
611 | break;
|
---|
612 | case 0x06:
|
---|
613 | ptr = vgafont16;
|
---|
614 | break;
|
---|
615 | case 0x07:
|
---|
616 | ptr = vgafont16alt;
|
---|
617 | break;
|
---|
618 | default:
|
---|
619 | #ifdef VGA_DEBUG
|
---|
620 | printf("Get font info subfn(%02x) not implemented\n", func);
|
---|
621 | #endif
|
---|
622 | return;
|
---|
623 | }
|
---|
624 | /* Split the far pointer and write it back. */
|
---|
625 | *u_ofs = (uint16_t)ptr;
|
---|
626 | *u_seg = (uint32_t)ptr >> 16;
|
---|
627 |
|
---|
628 | /* The character height (effectively bytes per glyph). */
|
---|
629 | *c_height = read_byte(BIOSMEM_SEG, BIOSMEM_CHAR_HEIGHT);
|
---|
630 |
|
---|
631 | /* The highest row number. */
|
---|
632 | *max_row = read_byte(BIOSMEM_SEG, BIOSMEM_NB_ROWS);
|
---|
633 | }
|
---|
634 |
|
---|
635 | static void vga_read_pixel(uint8_t page, uint16_t col, uint16_t row, uint16_t STACK_BASED *pixel)
|
---|
636 | {
|
---|
637 | uint8_t mode, line, mask, attr, data, i;
|
---|
638 | uint16_t addr;
|
---|
639 |
|
---|
640 | /* Determine current mode characteristics. */
|
---|
641 | mode = read_byte(BIOSMEM_SEG, BIOSMEM_CURRENT_MODE);
|
---|
642 | line = find_vga_entry(mode);
|
---|
643 | if (line == 0xFF)
|
---|
644 | return;
|
---|
645 | if (vga_modes[line].class == TEXT)
|
---|
646 | return;
|
---|
647 |
|
---|
648 | /* Read data depending on memory model. */
|
---|
649 | switch (vga_modes[line].memmodel) {
|
---|
650 | case PLANAR4:
|
---|
651 | case PLANAR1:
|
---|
652 | addr = col / 8 + row * read_word(BIOSMEM_SEG, BIOSMEM_NB_COLS);
|
---|
653 | addr += read_word(BIOSMEM_SEG, BIOSMEM_PAGE_SIZE) * page;
|
---|
654 | mask = 0x80 >> (col & 0x07);
|
---|
655 | attr = 0x00;
|
---|
656 | for (i = 0; i < 4; i++) {
|
---|
657 | outw(VGAREG_GRDC_ADDRESS, (i << 8) | 0x04);
|
---|
658 | data = read_byte(0xa000,addr) & mask;
|
---|
659 | if (data > 0)
|
---|
660 | attr |= (0x01 << i);
|
---|
661 | }
|
---|
662 | break;
|
---|
663 | case CGA:
|
---|
664 | addr = (col >> (4 - vga_modes[line].pixbits)) + (row >> 1) * 80;
|
---|
665 | if (row & 1)
|
---|
666 | addr += 0x2000;
|
---|
667 | data = read_byte(0xb800, addr);
|
---|
668 | if (vga_modes[line].pixbits == 2)
|
---|
669 | attr = (data >> ((3 - (col & 0x03)) * 2)) & 0x03;
|
---|
670 | else
|
---|
671 | attr = (data >> (7 - (col & 0x07))) & 0x01;
|
---|
672 | break;
|
---|
673 | case LINEAR8:
|
---|
674 | addr = col + row * (read_word(BIOSMEM_SEG, BIOSMEM_NB_COLS) * 8);
|
---|
675 | attr = read_byte(0xa000, addr);
|
---|
676 | break;
|
---|
677 | default:
|
---|
678 | #ifdef VGA_DEBUG
|
---|
679 | unimplemented();
|
---|
680 | #endif
|
---|
681 | attr = 0;
|
---|
682 | }
|
---|
683 | *(uint8_t STACK_BASED *)pixel = attr;
|
---|
684 | }
|
---|
685 |
|
---|
686 |
|
---|
687 |
|
---|
688 | // --------------------------------------------------------------------------------------------
|
---|
689 | /*static*/ void biosfn_perform_gray_scale_summing(uint16_t start, uint16_t count)
|
---|
690 | {uint8_t r,g,b;
|
---|
691 | uint16_t i;
|
---|
692 | uint16_t index;
|
---|
693 |
|
---|
694 | inb(VGAREG_ACTL_RESET);
|
---|
695 | outb(VGAREG_ACTL_ADDRESS,0x00);
|
---|
696 |
|
---|
697 | for( index = 0; index < count; index++ )
|
---|
698 | {
|
---|
699 | // set read address and switch to read mode
|
---|
700 | outb(VGAREG_DAC_READ_ADDRESS,start);
|
---|
701 | // get 6-bit wide RGB data values
|
---|
702 | r=inb( VGAREG_DAC_DATA );
|
---|
703 | g=inb( VGAREG_DAC_DATA );
|
---|
704 | b=inb( VGAREG_DAC_DATA );
|
---|
705 |
|
---|
706 | // intensity = ( 0.3 * Red ) + ( 0.59 * Green ) + ( 0.11 * Blue )
|
---|
707 | i = ( ( 77*r + 151*g + 28*b ) + 0x80 ) >> 8;
|
---|
708 |
|
---|
709 | if(i>0x3f)i=0x3f;
|
---|
710 |
|
---|
711 | // set write address and switch to write mode
|
---|
712 | outb(VGAREG_DAC_WRITE_ADDRESS,start);
|
---|
713 | // write new intensity value
|
---|
714 | outb( VGAREG_DAC_DATA, i&0xff );
|
---|
715 | outb( VGAREG_DAC_DATA, i&0xff );
|
---|
716 | outb( VGAREG_DAC_DATA, i&0xff );
|
---|
717 | start++;
|
---|
718 | }
|
---|
719 | inb(VGAREG_ACTL_RESET);
|
---|
720 | outb(VGAREG_ACTL_ADDRESS,0x20);
|
---|
721 | #ifdef VBOX
|
---|
722 | inb(VGAREG_ACTL_RESET);
|
---|
723 | #endif /* VBOX */
|
---|
724 | }
|
---|
725 |
|
---|
726 | // --------------------------------------------------------------------------------------------
|
---|
727 | static void biosfn_set_cursor_shape(uint8_t CH, uint8_t CL)
|
---|
728 | {
|
---|
729 | uint16_t cheight, curs, crtc_addr;
|
---|
730 | int cga_emu;
|
---|
731 |
|
---|
732 | /* Unmodified input is stored in the BDA. */
|
---|
733 | curs = (CH << 8) + CL;
|
---|
734 | write_word(BIOSMEM_SEG, BIOSMEM_CURSOR_TYPE, curs);
|
---|
735 |
|
---|
736 | /* Check if VGA is active. If not, just write the input to the CRTC. */
|
---|
737 | if (!(read_byte(BIOSMEM_SEG, BIOSMEM_VIDEO_CTL) & 8)) {
|
---|
738 | /* Trying to disable the cursor? */
|
---|
739 | if ((CH & 0x60) == 0x20) {
|
---|
740 | /* Special IBM-compatible value to turn off cursor. */
|
---|
741 | CH = 0x1E;
|
---|
742 | CL = 0;
|
---|
743 | } else {
|
---|
744 | cga_emu = !(read_byte(BIOSMEM_SEG, BIOSMEM_VIDEO_CTL) & 1);
|
---|
745 |
|
---|
746 | /* If CGA cursor emulation is on and this is a text mode, adjust.
|
---|
747 | * But if cursor star or end is bigger than 31, don't adjust.
|
---|
748 | */
|
---|
749 | /// @todo Figure out if this is a text mode
|
---|
750 | if (cga_emu /* && text mode*/ && (CH < 32) && (CL < 32)) {
|
---|
751 | cheight = read_word(BIOSMEM_SEG, BIOSMEM_CHAR_HEIGHT);
|
---|
752 |
|
---|
753 | /* Is the end lower than start? VGA does not wrap around.*/
|
---|
754 | if (CL < CH) {
|
---|
755 | /* For zero CL (end), leave values unchanged. */
|
---|
756 | if (CL) {
|
---|
757 | CH = 0;
|
---|
758 | CL = cheight - 1;
|
---|
759 | }
|
---|
760 | } else {
|
---|
761 | if (((CL | CH) >= cheight) || ((CL != cheight - 1) && (CH != cheight - 2))) {
|
---|
762 | /* If it's an overbar cursor, don't adjust. */
|
---|
763 | if (CL > 3) {
|
---|
764 | if (CL <= CH + 2) {
|
---|
765 | /* It's it a normal underline style cursor. */
|
---|
766 | CH = CH - CL + cheight - 1;
|
---|
767 | CL = cheight - 1;
|
---|
768 | if (cheight >= 14) {
|
---|
769 | /* Shift up one pixel for normal EGA/VGA fonts. */
|
---|
770 | CL--;
|
---|
771 | CH--;
|
---|
772 | }
|
---|
773 | } else if (CH <= 2) {
|
---|
774 | /* It's a full block cursor. */
|
---|
775 | CL = cheight - 1;
|
---|
776 | } else {
|
---|
777 | /* It's a half block cursor. */
|
---|
778 | CH = cheight / 2;
|
---|
779 | CL = cheight - 1;
|
---|
780 | }
|
---|
781 | }
|
---|
782 | }
|
---|
783 | }
|
---|
784 | }
|
---|
785 | }
|
---|
786 | }
|
---|
787 |
|
---|
788 | // CTRC regs 0x0a and 0x0b
|
---|
789 | crtc_addr = read_word(BIOSMEM_SEG, BIOSMEM_CRTC_ADDRESS);
|
---|
790 | outb(crtc_addr, 0x0a);
|
---|
791 | outb(crtc_addr + 1, CH);
|
---|
792 | outb(crtc_addr, 0x0b);
|
---|
793 | outb(crtc_addr + 1 ,CL);
|
---|
794 | }
|
---|
795 |
|
---|
796 | // --------------------------------------------------------------------------------------------
|
---|
797 | static void biosfn_set_cursor_pos (uint8_t page, uint16_t cursor)
|
---|
798 | {
|
---|
799 | uint8_t xcurs,ycurs,current;
|
---|
800 | uint16_t nbcols,nbrows,address,crtc_addr;
|
---|
801 |
|
---|
802 | // Should not happen...
|
---|
803 | if(page>7)return;
|
---|
804 |
|
---|
805 | // Bios cursor pos
|
---|
806 | write_word(BIOSMEM_SEG, BIOSMEM_CURSOR_POS+2*page, cursor);
|
---|
807 |
|
---|
808 | // Set the hardware cursor
|
---|
809 | current=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE);
|
---|
810 | if(page==current)
|
---|
811 | {
|
---|
812 | // Get the dimensions
|
---|
813 | nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
814 | nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1;
|
---|
815 |
|
---|
816 | xcurs=cursor&0x00ff;ycurs=(cursor&0xff00)>>8;
|
---|
817 |
|
---|
818 | // Calculate the address knowing nbcols nbrows and page num
|
---|
819 | address=SCREEN_IO_START(nbcols,nbrows,page)+xcurs+ycurs*nbcols;
|
---|
820 |
|
---|
821 | // CRTC regs 0x0e and 0x0f
|
---|
822 | crtc_addr=read_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS);
|
---|
823 | outb(crtc_addr,0x0e);
|
---|
824 | outb(crtc_addr+1,(address&0xff00)>>8);
|
---|
825 | outb(crtc_addr,0x0f);
|
---|
826 | outb(crtc_addr+1,address&0x00ff);
|
---|
827 | }
|
---|
828 | }
|
---|
829 |
|
---|
830 | // --------------------------------------------------------------------------------------------
|
---|
831 | static void biosfn_set_active_page(uint8_t page)
|
---|
832 | {
|
---|
833 | uint16_t cursor,dummy,crtc_addr;
|
---|
834 | uint16_t nbcols,nbrows,address;
|
---|
835 | uint8_t mode,line;
|
---|
836 |
|
---|
837 | if(page>7)return;
|
---|
838 |
|
---|
839 | // Get the mode
|
---|
840 | mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE);
|
---|
841 | line=find_vga_entry(mode);
|
---|
842 | if(line==0xFF)return;
|
---|
843 |
|
---|
844 | // Get pos curs pos for the right page
|
---|
845 | vga_get_cursor_pos(page,&dummy,&cursor);
|
---|
846 |
|
---|
847 | if(vga_modes[line].class==TEXT)
|
---|
848 | {
|
---|
849 | // Get the dimensions
|
---|
850 | nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
851 | nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1;
|
---|
852 |
|
---|
853 | // Calculate the address knowing nbcols nbrows and page num
|
---|
854 | address=SCREEN_MEM_START(nbcols,nbrows,page);
|
---|
855 | write_word(BIOSMEM_SEG,BIOSMEM_CURRENT_START,address);
|
---|
856 |
|
---|
857 | // Start address
|
---|
858 | address=SCREEN_IO_START(nbcols,nbrows,page);
|
---|
859 | }
|
---|
860 | else
|
---|
861 | {
|
---|
862 | address = page * video_param_table[line_to_vpti[line]].slength;
|
---|
863 | }
|
---|
864 |
|
---|
865 | // CRTC regs 0x0c and 0x0d
|
---|
866 | crtc_addr=read_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS);
|
---|
867 | outb(crtc_addr,0x0c);
|
---|
868 | outb(crtc_addr+1,(address&0xff00)>>8);
|
---|
869 | outb(crtc_addr,0x0d);
|
---|
870 | outb(crtc_addr+1,address&0x00ff);
|
---|
871 |
|
---|
872 | // And change the BIOS page
|
---|
873 | write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE,page);
|
---|
874 |
|
---|
875 | #ifdef VGA_DEBUG
|
---|
876 | printf("Set active page %02x address %04x\n",page,address);
|
---|
877 | #endif
|
---|
878 |
|
---|
879 | // Display the cursor, now the page is active
|
---|
880 | biosfn_set_cursor_pos(page,cursor);
|
---|
881 | }
|
---|
882 |
|
---|
883 | /// Recursive BIOS invocation, uses vector 6Dh
|
---|
884 | extern void vga_font_set(uint8_t function, uint8_t data);
|
---|
885 | #pragma aux vga_font_set = \
|
---|
886 | "mov ah, 11h" \
|
---|
887 | "int 6Dh" \
|
---|
888 | parm [al] [bl];
|
---|
889 |
|
---|
890 | // ============================================================================================
|
---|
891 | //
|
---|
892 | // BIOS functions
|
---|
893 | //
|
---|
894 | // ============================================================================================
|
---|
895 |
|
---|
896 | /* CGA-compatible MSR (0x3D8) register values for first modes 0-7. */
|
---|
897 | uint8_t cga_msr[8] = {
|
---|
898 | 0x2C, 0x28, 0x2D, 0x29, 0x2A, 0x2E, 0x1E, 0x29
|
---|
899 | };
|
---|
900 |
|
---|
901 | /* Convert index in vga_modes[] to index in video_param_table[] for 200-line (CGA) text modes. */
|
---|
902 | static int8_t line_to_vpti_200[8] = {
|
---|
903 | 0x00, 0x01, 0x02, 0x03, -1, -1, -1, 0x07
|
---|
904 | };
|
---|
905 |
|
---|
906 | /* Same for 350-line (EGA) text modes. */
|
---|
907 | static int8_t line_to_vpti_350[8] = {
|
---|
908 | 0x13, 0x14, 0x15, 0x16, -1, -1, -1, 0x07
|
---|
909 | };
|
---|
910 |
|
---|
911 | /* Same for 400-line (VGA) text modes. */
|
---|
912 | static int8_t line_to_vpti_400[8] = {
|
---|
913 | 0x17, 0x17, 0x18, 0x18, -1, -1, -1, 0x19
|
---|
914 | };
|
---|
915 |
|
---|
916 | int find_vpti(uint8_t line)
|
---|
917 | {
|
---|
918 | int idx;
|
---|
919 | uint8_t mctl;
|
---|
920 |
|
---|
921 | if (vga_modes[line].class == TEXT) {
|
---|
922 | mctl = read_byte(BIOSMEM_SEG, BIOSMEM_MODESET_CTL);
|
---|
923 | if (mctl & 0x10)
|
---|
924 | idx = line_to_vpti_400[line];
|
---|
925 | else if (mctl & 0x80)
|
---|
926 | idx = line_to_vpti_200[line];
|
---|
927 | else
|
---|
928 | idx = line_to_vpti_350[line];
|
---|
929 | } else
|
---|
930 | idx = line_to_vpti[line];
|
---|
931 |
|
---|
932 | return idx;
|
---|
933 | }
|
---|
934 |
|
---|
935 | static void biosfn_load_text_user_pat(uint8_t AL, uint16_t ES, uint16_t BP, uint16_t CX, uint16_t DX, uint8_t BL, uint8_t BH);
|
---|
936 | static void load_text_patch(uint16_t ES, uint16_t BP, uint8_t BL, uint8_t BH);
|
---|
937 |
|
---|
938 | void biosfn_set_video_mode(uint8_t mode)
|
---|
939 | {// mode: Bit 7 is 1 if no clear screen
|
---|
940 |
|
---|
941 | // Should we clear the screen ?
|
---|
942 | uint8_t noclearmem=mode&0x80;
|
---|
943 | uint8_t line,mmask,vpti;
|
---|
944 | uint8_t modeset_ctl;
|
---|
945 | uint8_t *palette;
|
---|
946 | uint16_t i;
|
---|
947 | uint16_t crtc_addr;
|
---|
948 | void __far * __far *save_area;
|
---|
949 | VideoParamTableEntry __far *vpt;
|
---|
950 |
|
---|
951 | #ifdef VBE
|
---|
952 | if (vbe_has_vbe_display()) {
|
---|
953 | // Force controller into VGA mode
|
---|
954 | outb(VGAREG_SEQU_ADDRESS,7);
|
---|
955 | outb(VGAREG_SEQU_DATA,0x00);
|
---|
956 | }
|
---|
957 | #endif // def VBE
|
---|
958 |
|
---|
959 | // The real mode
|
---|
960 | mode=mode&0x7f;
|
---|
961 |
|
---|
962 | // Display switching is not supported; mono monitors aren't really either,
|
---|
963 | // but requests to set mode 7 are honored.
|
---|
964 |
|
---|
965 | // find the entry in the video modes
|
---|
966 | line=find_vga_entry(mode);
|
---|
967 |
|
---|
968 | #ifdef VGA_DEBUG
|
---|
969 | printf("mode search %02x found line %02x\n",mode,line);
|
---|
970 | #endif
|
---|
971 |
|
---|
972 | if(line==0xFF)
|
---|
973 | return;
|
---|
974 |
|
---|
975 | // Read the save area pointer.
|
---|
976 | save_area = (void __far *)read_dword(BIOSMEM_SEG, BIOSMEM_VS_POINTER);
|
---|
977 |
|
---|
978 | vpti = find_vpti(line);
|
---|
979 | vpt = save_area[0];
|
---|
980 | vpt += vpti;
|
---|
981 |
|
---|
982 | #if 0 // These are unused, but perhaps they shouldn't be?
|
---|
983 | // Read the bios vga control
|
---|
984 | video_ctl=read_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL);
|
---|
985 |
|
---|
986 | // Read the bios vga switches
|
---|
987 | vga_switches=read_byte(BIOSMEM_SEG,BIOSMEM_SWITCHES);
|
---|
988 | #endif
|
---|
989 |
|
---|
990 | // Read the bios mode set control
|
---|
991 | modeset_ctl=read_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL);
|
---|
992 |
|
---|
993 | // Then we know the number of lines
|
---|
994 | // FIXME
|
---|
995 |
|
---|
996 | // if palette loading (bit 3 of modeset ctl = 0)
|
---|
997 | if((modeset_ctl&0x08)==0)
|
---|
998 | {// Set the PEL mask
|
---|
999 | outb(VGAREG_PEL_MASK,vga_modes[line].pelmask);
|
---|
1000 |
|
---|
1001 | // Set the whole dac always, from 0
|
---|
1002 | outb(VGAREG_DAC_WRITE_ADDRESS,0x00);
|
---|
1003 |
|
---|
1004 | // From which palette
|
---|
1005 | switch(vga_modes[line].dacmodel)
|
---|
1006 | {case 0:
|
---|
1007 | palette=&palette0[0];
|
---|
1008 | break;
|
---|
1009 | case 1:
|
---|
1010 | palette=&palette1[0];
|
---|
1011 | break;
|
---|
1012 | case 2:
|
---|
1013 | palette=&palette2[0];
|
---|
1014 | break;
|
---|
1015 | case 3:
|
---|
1016 | palette=&palette3[0];
|
---|
1017 | break;
|
---|
1018 | }
|
---|
1019 | // Override for CGA text modes.
|
---|
1020 | if(vga_modes[line].class==TEXT)
|
---|
1021 | {
|
---|
1022 | if(vpt->cheight == 8) // CGA
|
---|
1023 | palette=&palette1[0];
|
---|
1024 | }
|
---|
1025 | // Always 256*3 values
|
---|
1026 | for(i=0;i<0x0100;i++)
|
---|
1027 | {if(i<=dac_regs[vga_modes[line].dacmodel])
|
---|
1028 | {outb(VGAREG_DAC_DATA,palette[(i*3)+0]);
|
---|
1029 | outb(VGAREG_DAC_DATA,palette[(i*3)+1]);
|
---|
1030 | outb(VGAREG_DAC_DATA,palette[(i*3)+2]);
|
---|
1031 | }
|
---|
1032 | else
|
---|
1033 | {outb(VGAREG_DAC_DATA,0);
|
---|
1034 | outb(VGAREG_DAC_DATA,0);
|
---|
1035 | outb(VGAREG_DAC_DATA,0);
|
---|
1036 | }
|
---|
1037 | }
|
---|
1038 | if((modeset_ctl&0x02)==0x02)
|
---|
1039 | {
|
---|
1040 | biosfn_perform_gray_scale_summing(0x00, 0x100);
|
---|
1041 | }
|
---|
1042 | }
|
---|
1043 |
|
---|
1044 | // Reset Attribute Ctl flip-flop
|
---|
1045 | inb(VGAREG_ACTL_RESET);
|
---|
1046 |
|
---|
1047 | // Set Attribute Ctl
|
---|
1048 | for(i=0;i<=0x13;i++)
|
---|
1049 | {outb(VGAREG_ACTL_ADDRESS,i);
|
---|
1050 | outb(VGAREG_ACTL_WRITE_DATA,vpt->actl_regs[i]);
|
---|
1051 | }
|
---|
1052 | outb(VGAREG_ACTL_ADDRESS,0x14);
|
---|
1053 | outb(VGAREG_ACTL_WRITE_DATA,0x00);
|
---|
1054 |
|
---|
1055 | // Save palette into the save area if it exists.
|
---|
1056 | if(save_area[1])
|
---|
1057 | {
|
---|
1058 | uint8_t __far *dyn_save;
|
---|
1059 |
|
---|
1060 | dyn_save = save_area[1];
|
---|
1061 | for (i = 0; i < 16; ++i)
|
---|
1062 | dyn_save[i] = vpt->actl_regs[i];
|
---|
1063 | dyn_save[16] = vpt->actl_regs[17];
|
---|
1064 | }
|
---|
1065 |
|
---|
1066 | // Set Sequencer Ctl
|
---|
1067 | outb(VGAREG_SEQU_ADDRESS,0);
|
---|
1068 | outb(VGAREG_SEQU_DATA,0x03);
|
---|
1069 | for(i=1;i<=4;i++)
|
---|
1070 | {outb(VGAREG_SEQU_ADDRESS,i);
|
---|
1071 | outb(VGAREG_SEQU_DATA,vpt->sequ_regs[i - 1]);
|
---|
1072 | }
|
---|
1073 |
|
---|
1074 | // Set Grafx Ctl
|
---|
1075 | for(i=0;i<=8;i++)
|
---|
1076 | {outb(VGAREG_GRDC_ADDRESS,i);
|
---|
1077 | outb(VGAREG_GRDC_DATA,vpt->grdc_regs[i]);
|
---|
1078 | }
|
---|
1079 |
|
---|
1080 | // Set CRTC address VGA or MDA
|
---|
1081 | crtc_addr=vga_modes[line].memmodel==MTEXT?VGAREG_MDA_CRTC_ADDRESS:VGAREG_VGA_CRTC_ADDRESS;
|
---|
1082 |
|
---|
1083 | // Set the misc register; may change CRTC base!
|
---|
1084 | outb(VGAREG_WRITE_MISC_OUTPUT,vpt->miscreg);
|
---|
1085 |
|
---|
1086 | // Disable CRTC write protection
|
---|
1087 | outw(crtc_addr,0x0011);
|
---|
1088 | // Set CRTC regs
|
---|
1089 | for(i=0;i<=0x18;i++)
|
---|
1090 | {outb(crtc_addr,i);
|
---|
1091 | outb(crtc_addr+1,vpt->crtc_regs[i]);
|
---|
1092 | }
|
---|
1093 |
|
---|
1094 | // Enable video
|
---|
1095 | outb(VGAREG_ACTL_ADDRESS,0x20);
|
---|
1096 | inb(crtc_addr + VGAREG_ACTL_RESET - VGAREG_VGA_CRTC_ADDRESS);
|
---|
1097 |
|
---|
1098 | if(noclearmem==0x00)
|
---|
1099 | {
|
---|
1100 | if(vga_modes[line].class==TEXT)
|
---|
1101 | {
|
---|
1102 | memsetw(vga_modes[line].sstart,0,0x0720,0x4000); // 32k
|
---|
1103 | }
|
---|
1104 | else
|
---|
1105 | {
|
---|
1106 | if(mode<0x0d)
|
---|
1107 | {
|
---|
1108 | memsetw(vga_modes[line].sstart,0,0x0000,0x4000); // 32k
|
---|
1109 | }
|
---|
1110 | else
|
---|
1111 | {
|
---|
1112 | outb( VGAREG_SEQU_ADDRESS, 0x02 );
|
---|
1113 | mmask = inb( VGAREG_SEQU_DATA );
|
---|
1114 | outb( VGAREG_SEQU_DATA, 0x0f ); // all planes
|
---|
1115 | memsetw(vga_modes[line].sstart,0,0x0000,0x8000); // 64k
|
---|
1116 | outb( VGAREG_SEQU_DATA, mmask );
|
---|
1117 | }
|
---|
1118 | }
|
---|
1119 | }
|
---|
1120 |
|
---|
1121 | // Set the BIOS mem
|
---|
1122 | write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE,mode);
|
---|
1123 | write_word(BIOSMEM_SEG,BIOSMEM_NB_COLS,vpt->twidth);
|
---|
1124 | write_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE,vpt->slength);
|
---|
1125 | write_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS,crtc_addr);
|
---|
1126 | write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS,vpt->theightm1);
|
---|
1127 | write_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT,vpt->cheight);
|
---|
1128 | write_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL,(0x60|noclearmem));
|
---|
1129 | write_byte(BIOSMEM_SEG,BIOSMEM_SWITCHES,0xF9);
|
---|
1130 |
|
---|
1131 | // FIXME We nearly have the good tables. to be reworked
|
---|
1132 | write_byte(BIOSMEM_SEG,BIOSMEM_DCC_INDEX,0x08); // 8 is VGA should be ok for now
|
---|
1133 |
|
---|
1134 | if (mode <= 7)
|
---|
1135 | {
|
---|
1136 | write_byte(BIOSMEM_SEG, BIOSMEM_CURRENT_MSR, cga_msr[mode]); /* Like CGA reg. 0x3D8 */
|
---|
1137 | write_byte(BIOSMEM_SEG, BIOSMEM_CURRENT_PAL, mode == 6 ? 0x3F : 0x30); /* Like CGA reg. 0x3D9*/
|
---|
1138 | }
|
---|
1139 |
|
---|
1140 | // Set cursor shape
|
---|
1141 | if(vga_modes[line].class==TEXT)
|
---|
1142 | {
|
---|
1143 | biosfn_set_cursor_shape(0x06,0x07);
|
---|
1144 | }
|
---|
1145 |
|
---|
1146 | /// @todo Could be optimized to a memset since only BDA needs updating.
|
---|
1147 | // Set cursor pos for page 0..7
|
---|
1148 | for(i=0;i<8;i++)
|
---|
1149 | biosfn_set_cursor_pos(i,0x0000);
|
---|
1150 |
|
---|
1151 | // Set active page 0
|
---|
1152 | biosfn_set_active_page(0x00);
|
---|
1153 |
|
---|
1154 | // Write the fonts in memory
|
---|
1155 | if(vga_modes[line].class==TEXT)
|
---|
1156 | {
|
---|
1157 | cso_txt __far *ovr = save_area[2];
|
---|
1158 |
|
---|
1159 | switch (vpt->cheight) {
|
---|
1160 | case 8:
|
---|
1161 | biosfn_load_text_user_pat(0, 0xC000, (uint16_t)vgafont8, 256, 0, 0, vpt->cheight);
|
---|
1162 | break;
|
---|
1163 | case 14:
|
---|
1164 | biosfn_load_text_user_pat(0, 0xC000, (uint16_t)vgafont14, 256, 0, 0, vpt->cheight);
|
---|
1165 | if (mode == 7) /* 350-line EGA modes are 640 wide, only mono EGA mode is 720 wide. */
|
---|
1166 | load_text_patch(0xC000, (uint16_t)vgafont14alt, 0, 14);
|
---|
1167 | break;
|
---|
1168 | default:
|
---|
1169 | biosfn_load_text_user_pat(0, 0xC000, (uint16_t)vgafont16, 256, 0, 0, vpt->cheight);
|
---|
1170 | load_text_patch(0xC000, (uint16_t)vgafont16alt, 0, 16);
|
---|
1171 | }
|
---|
1172 | if (ovr)
|
---|
1173 | {
|
---|
1174 | #ifdef VGA_DEBUG
|
---|
1175 | printf("Charmap override found, font at %04x:%04x\n", ovr->font_seg, ovr->font_ofs);
|
---|
1176 | #endif
|
---|
1177 | i = 0;
|
---|
1178 | // Does the override support current mode?
|
---|
1179 | while (ovr->modes[i] != 0xff)
|
---|
1180 | {
|
---|
1181 | if (ovr->modes[i] == mode)
|
---|
1182 | break;
|
---|
1183 | ++i;
|
---|
1184 | }
|
---|
1185 | // If there is a valid font override, apply it.
|
---|
1186 | if (ovr->modes[i] == mode)
|
---|
1187 | {
|
---|
1188 | #ifdef VGA_DEBUG
|
---|
1189 | printf("Loading override, %04x chars, height %02x\n", ovr->char_num, ovr->c_height);
|
---|
1190 | #endif
|
---|
1191 | biosfn_load_text_user_pat(0x10, ovr->font_seg, ovr->font_ofs, ovr->char_num,
|
---|
1192 | ovr->char_1st, ovr->cgen_bank, ovr->c_height);
|
---|
1193 | }
|
---|
1194 | }
|
---|
1195 | vga_font_set(0x03, 0); /* Select font page mode 0. */
|
---|
1196 | }
|
---|
1197 |
|
---|
1198 | // Set the ints 0x1F and 0x43
|
---|
1199 | set_int_vector(0x1f, vgafont8+128*8);
|
---|
1200 |
|
---|
1201 | switch(vpt->cheight)
|
---|
1202 | {case 8:
|
---|
1203 | set_int_vector(0x43, vgafont8);
|
---|
1204 | break;
|
---|
1205 | case 14:
|
---|
1206 | set_int_vector(0x43, vgafont14);
|
---|
1207 | break;
|
---|
1208 | case 16:
|
---|
1209 | set_int_vector(0x43, vgafont16);
|
---|
1210 | break;
|
---|
1211 | }
|
---|
1212 | }
|
---|
1213 |
|
---|
1214 | // --------------------------------------------------------------------------------------------
|
---|
1215 | static void vgamem_copy_pl4(uint8_t xstart, uint8_t ysrc, uint8_t ydest,
|
---|
1216 | uint8_t cols, uint8_t nbcols, uint8_t cheight)
|
---|
1217 | {
|
---|
1218 | uint16_t src,dest;
|
---|
1219 | uint8_t i;
|
---|
1220 |
|
---|
1221 | src=ysrc*cheight*nbcols+xstart;
|
---|
1222 | dest=ydest*cheight*nbcols+xstart;
|
---|
1223 | outw(VGAREG_GRDC_ADDRESS, 0x0105);
|
---|
1224 | for(i=0;i<cheight;i++)
|
---|
1225 | {
|
---|
1226 | memcpyb(0xa000,dest+i*nbcols,0xa000,src+i*nbcols,cols);
|
---|
1227 | }
|
---|
1228 | outw(VGAREG_GRDC_ADDRESS, 0x0005);
|
---|
1229 | }
|
---|
1230 |
|
---|
1231 | // --------------------------------------------------------------------------------------------
|
---|
1232 | static void vgamem_fill_pl4(uint8_t xstart, uint8_t ystart, uint8_t cols,
|
---|
1233 | uint8_t nbcols, uint8_t cheight, uint8_t attr)
|
---|
1234 | {
|
---|
1235 | uint16_t dest;
|
---|
1236 | uint8_t i;
|
---|
1237 |
|
---|
1238 | dest=ystart*cheight*nbcols+xstart;
|
---|
1239 | outw(VGAREG_GRDC_ADDRESS, 0x0205);
|
---|
1240 | for(i=0;i<cheight;i++)
|
---|
1241 | {
|
---|
1242 | memsetb(0xa000,dest+i*nbcols,attr,cols);
|
---|
1243 | }
|
---|
1244 | outw(VGAREG_GRDC_ADDRESS, 0x0005);
|
---|
1245 | }
|
---|
1246 |
|
---|
1247 | // --------------------------------------------------------------------------------------------
|
---|
1248 | static void vgamem_copy_cga(uint8_t xstart, uint8_t ysrc, uint8_t ydest,
|
---|
1249 | uint8_t cols, uint8_t nbcols, uint8_t cheight)
|
---|
1250 | {
|
---|
1251 | uint16_t src,dest;
|
---|
1252 | uint8_t i;
|
---|
1253 |
|
---|
1254 | src=((ysrc*cheight*nbcols)>>1)+xstart;
|
---|
1255 | dest=((ydest*cheight*nbcols)>>1)+xstart;
|
---|
1256 | for(i=0;i<cheight/2;i++)
|
---|
1257 | {
|
---|
1258 | memcpyb(0xb800,dest+i*nbcols,0xb800,src+i*nbcols,cols);
|
---|
1259 | memcpyb(0xb800,0x2000+dest+i*nbcols,0xb800,0x2000+src+i*nbcols,cols);
|
---|
1260 | }
|
---|
1261 | }
|
---|
1262 |
|
---|
1263 | // --------------------------------------------------------------------------------------------
|
---|
1264 | static void vgamem_fill_cga(uint8_t xstart, uint8_t ystart, uint8_t cols,
|
---|
1265 | uint8_t nbcols, uint8_t cheight, uint8_t attr)
|
---|
1266 | {
|
---|
1267 | uint16_t dest;
|
---|
1268 | uint8_t i;
|
---|
1269 |
|
---|
1270 | dest=((ystart*cheight*nbcols)>>1)+xstart;
|
---|
1271 | for(i=0;i<cheight/2;i++)
|
---|
1272 | {
|
---|
1273 | memsetb(0xb800,dest+i*nbcols,attr,cols);
|
---|
1274 | memsetb(0xb800,0x2000+dest+i*nbcols,attr,cols);
|
---|
1275 | }
|
---|
1276 | }
|
---|
1277 |
|
---|
1278 | // --------------------------------------------------------------------------------------------
|
---|
1279 | static void vgamem_copy_linear(uint8_t xstart, uint8_t ysrc, uint8_t ydest,
|
---|
1280 | uint16_t cols, uint16_t nbcols, uint8_t cheight)
|
---|
1281 | {
|
---|
1282 | uint16_t src,dest;
|
---|
1283 | uint8_t i;
|
---|
1284 |
|
---|
1285 | src=((ysrc*cheight*nbcols)+xstart)*8;
|
---|
1286 | dest=((ydest*cheight*nbcols)+xstart)*8;
|
---|
1287 | cols*=8;
|
---|
1288 | nbcols*=8;
|
---|
1289 | for(i=0;i<cheight;i++)
|
---|
1290 | {
|
---|
1291 | memcpyb(0xa000,dest+i*nbcols,0xa000,src+i*nbcols,cols);
|
---|
1292 | }
|
---|
1293 | }
|
---|
1294 |
|
---|
1295 | // --------------------------------------------------------------------------------------------
|
---|
1296 | static void vgamem_fill_linear(uint8_t xstart, uint8_t ystart, uint16_t cols,
|
---|
1297 | uint16_t nbcols, uint8_t cheight, uint8_t attr)
|
---|
1298 | {
|
---|
1299 | uint16_t dest;
|
---|
1300 | uint8_t i;
|
---|
1301 |
|
---|
1302 | dest=((ystart*cheight*nbcols)+xstart)*8;
|
---|
1303 | cols*=8;
|
---|
1304 | nbcols*=8;
|
---|
1305 | for(i=0;i<cheight;i++)
|
---|
1306 | {
|
---|
1307 | memsetb(0xa000,dest+i*nbcols,attr,cols);
|
---|
1308 | }
|
---|
1309 | }
|
---|
1310 |
|
---|
1311 | // --------------------------------------------------------------------------------------------
|
---|
1312 | static void biosfn_scroll(uint8_t nblines, uint8_t attr, uint8_t rul, uint8_t cul,
|
---|
1313 | uint8_t rlr, uint8_t clr, uint8_t page, uint8_t dir)
|
---|
1314 | {
|
---|
1315 | // page == 0xFF if current
|
---|
1316 |
|
---|
1317 | uint8_t mode,line,cheight,bpp,cols;
|
---|
1318 | uint16_t nbcols,nbrows,i;
|
---|
1319 | uint16_t address;
|
---|
1320 |
|
---|
1321 | if(rul>rlr)return;
|
---|
1322 | if(cul>clr)return;
|
---|
1323 |
|
---|
1324 | // Get the mode
|
---|
1325 | mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE);
|
---|
1326 | line=find_vga_entry(mode);
|
---|
1327 | if(line==0xFF)return;
|
---|
1328 |
|
---|
1329 | // Get the dimensions
|
---|
1330 | nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1;
|
---|
1331 | nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
1332 |
|
---|
1333 | // Get the current page
|
---|
1334 | if(page==0xFF)
|
---|
1335 | page=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE);
|
---|
1336 |
|
---|
1337 | if(rlr>=nbrows)rlr=nbrows-1;
|
---|
1338 | if(clr>=nbcols)clr=nbcols-1;
|
---|
1339 | if(nblines>nbrows)nblines=0;
|
---|
1340 | cols=clr-cul+1;
|
---|
1341 |
|
---|
1342 | if(vga_modes[line].class==TEXT)
|
---|
1343 | {
|
---|
1344 | // Compute the address
|
---|
1345 | address=SCREEN_MEM_START(nbcols,nbrows,page);
|
---|
1346 | #ifdef VGA_DEBUG
|
---|
1347 | printf("Scroll, address %04x (%04x %04x %02x)\n",address,nbrows,nbcols,page);
|
---|
1348 | #endif
|
---|
1349 |
|
---|
1350 | if(nblines==0&&rul==0&&cul==0&&rlr==nbrows-1&&clr==nbcols-1)
|
---|
1351 | {
|
---|
1352 | memsetw(vga_modes[line].sstart,address,(uint16_t)attr*0x100+' ',nbrows*nbcols);
|
---|
1353 | }
|
---|
1354 | else
|
---|
1355 | {// if Scroll up
|
---|
1356 | if(dir==SCROLL_UP)
|
---|
1357 | {for(i=rul;i<=rlr;i++)
|
---|
1358 | {
|
---|
1359 | if((i+nblines>rlr)||(nblines==0))
|
---|
1360 | memsetw(vga_modes[line].sstart,address+(i*nbcols+cul)*2,(uint16_t)attr*0x100+' ',cols);
|
---|
1361 | else
|
---|
1362 | memcpyw(vga_modes[line].sstart,address+(i*nbcols+cul)*2,vga_modes[line].sstart,((i+nblines)*nbcols+cul)*2,cols);
|
---|
1363 | }
|
---|
1364 | }
|
---|
1365 | else
|
---|
1366 | {for(i=rlr;i>=rul;i--)
|
---|
1367 | {
|
---|
1368 | if((i<rul+nblines)||(nblines==0))
|
---|
1369 | memsetw(vga_modes[line].sstart,address+(i*nbcols+cul)*2,(uint16_t)attr*0x100+' ',cols);
|
---|
1370 | else
|
---|
1371 | memcpyw(vga_modes[line].sstart,address+(i*nbcols+cul)*2,vga_modes[line].sstart,((i-nblines)*nbcols+cul)*2,cols);
|
---|
1372 | if (i>rlr) break;
|
---|
1373 | }
|
---|
1374 | }
|
---|
1375 | }
|
---|
1376 | }
|
---|
1377 | else
|
---|
1378 | {
|
---|
1379 | cheight=video_param_table[line_to_vpti[line]].cheight;
|
---|
1380 | switch(vga_modes[line].memmodel)
|
---|
1381 | {
|
---|
1382 | case PLANAR4:
|
---|
1383 | case PLANAR1:
|
---|
1384 | if(nblines==0&&rul==0&&cul==0&&rlr==nbrows-1&&clr==nbcols-1)
|
---|
1385 | {
|
---|
1386 | outw(VGAREG_GRDC_ADDRESS, 0x0205);
|
---|
1387 | memsetb(vga_modes[line].sstart,0,attr,nbrows*nbcols*cheight);
|
---|
1388 | outw(VGAREG_GRDC_ADDRESS, 0x0005);
|
---|
1389 | }
|
---|
1390 | else
|
---|
1391 | {// if Scroll up
|
---|
1392 | if(dir==SCROLL_UP)
|
---|
1393 | {for(i=rul;i<=rlr;i++)
|
---|
1394 | {
|
---|
1395 | if((i+nblines>rlr)||(nblines==0))
|
---|
1396 | vgamem_fill_pl4(cul,i,cols,nbcols,cheight,attr);
|
---|
1397 | else
|
---|
1398 | vgamem_copy_pl4(cul,i+nblines,i,cols,nbcols,cheight);
|
---|
1399 | }
|
---|
1400 | }
|
---|
1401 | else
|
---|
1402 | {for(i=rlr;i>=rul;i--)
|
---|
1403 | {
|
---|
1404 | if((i<rul+nblines)||(nblines==0))
|
---|
1405 | vgamem_fill_pl4(cul,i,cols,nbcols,cheight,attr);
|
---|
1406 | else
|
---|
1407 | vgamem_copy_pl4(cul,i-nblines,i,cols,nbcols,cheight);
|
---|
1408 | if (i>rlr) break;
|
---|
1409 | }
|
---|
1410 | }
|
---|
1411 | }
|
---|
1412 | break;
|
---|
1413 | case CGA:
|
---|
1414 | bpp=vga_modes[line].pixbits;
|
---|
1415 | if(nblines==0&&rul==0&&cul==0&&rlr==nbrows-1&&clr==nbcols-1)
|
---|
1416 | {
|
---|
1417 | memsetb(vga_modes[line].sstart,0,attr,nbrows*nbcols*cheight*bpp);
|
---|
1418 | }
|
---|
1419 | else
|
---|
1420 | {
|
---|
1421 | if(bpp==2)
|
---|
1422 | {
|
---|
1423 | cul<<=1;
|
---|
1424 | cols<<=1;
|
---|
1425 | nbcols<<=1;
|
---|
1426 | }
|
---|
1427 | // if Scroll up
|
---|
1428 | if(dir==SCROLL_UP)
|
---|
1429 | {for(i=rul;i<=rlr;i++)
|
---|
1430 | {
|
---|
1431 | if((i+nblines>rlr)||(nblines==0))
|
---|
1432 | vgamem_fill_cga(cul,i,cols,nbcols,cheight,attr);
|
---|
1433 | else
|
---|
1434 | vgamem_copy_cga(cul,i+nblines,i,cols,nbcols,cheight);
|
---|
1435 | }
|
---|
1436 | }
|
---|
1437 | else
|
---|
1438 | {for(i=rlr;i>=rul;i--)
|
---|
1439 | {
|
---|
1440 | if((i<rul+nblines)||(nblines==0))
|
---|
1441 | vgamem_fill_cga(cul,i,cols,nbcols,cheight,attr);
|
---|
1442 | else
|
---|
1443 | vgamem_copy_cga(cul,i-nblines,i,cols,nbcols,cheight);
|
---|
1444 | if (i>rlr) break;
|
---|
1445 | }
|
---|
1446 | }
|
---|
1447 | }
|
---|
1448 | break;
|
---|
1449 | case LINEAR8:
|
---|
1450 | if(nblines==0&&rul==0&&cul==0&&rlr==nbrows-1&&clr==nbcols-1)
|
---|
1451 | {
|
---|
1452 | memsetb(vga_modes[line].sstart,0,attr,nbrows*nbcols*cheight*8);
|
---|
1453 | }
|
---|
1454 | else
|
---|
1455 | {
|
---|
1456 | // if Scroll up
|
---|
1457 | if(dir==SCROLL_UP)
|
---|
1458 | {for(i=rul;i<=rlr;i++)
|
---|
1459 | {
|
---|
1460 | if((i+nblines>rlr)||(nblines==0))
|
---|
1461 | vgamem_fill_linear(cul,i,cols,nbcols,cheight,attr);
|
---|
1462 | else
|
---|
1463 | vgamem_copy_linear(cul,i+nblines,i,cols,nbcols,cheight);
|
---|
1464 | }
|
---|
1465 | }
|
---|
1466 | else
|
---|
1467 | {for(i=rlr;i>=rul;i--)
|
---|
1468 | {
|
---|
1469 | if((i<rul+nblines)||(nblines==0))
|
---|
1470 | vgamem_fill_linear(cul,i,cols,nbcols,cheight,attr);
|
---|
1471 | else
|
---|
1472 | vgamem_copy_linear(cul,i-nblines,i,cols,nbcols,cheight);
|
---|
1473 | if (i>rlr) break;
|
---|
1474 | }
|
---|
1475 | }
|
---|
1476 | }
|
---|
1477 | break;
|
---|
1478 | #ifdef VGA_DEBUG
|
---|
1479 | default:
|
---|
1480 | printf("Scroll in graphics mode ");
|
---|
1481 | unimplemented();
|
---|
1482 | #endif
|
---|
1483 | }
|
---|
1484 | }
|
---|
1485 | }
|
---|
1486 |
|
---|
1487 | // --------------------------------------------------------------------------------------------
|
---|
1488 | static void write_gfx_char_pl4(uint8_t car, uint8_t attr, uint8_t xcurs,
|
---|
1489 | uint8_t ycurs, uint8_t nbcols, uint8_t cheight, uint8_t page)
|
---|
1490 | {
|
---|
1491 | uint8_t i,j,mask;
|
---|
1492 | uint8_t __far *fdata;
|
---|
1493 | uint16_t addr,dest,src;
|
---|
1494 |
|
---|
1495 | fdata = (void __far *)read_dword(0x00, 0x43 * 4);
|
---|
1496 |
|
---|
1497 | addr=xcurs+ycurs*cheight*nbcols;
|
---|
1498 | addr+=read_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE)*page;
|
---|
1499 | src = car * cheight;
|
---|
1500 | outw(VGAREG_SEQU_ADDRESS, 0x0f02);
|
---|
1501 | outw(VGAREG_GRDC_ADDRESS, 0x0205);
|
---|
1502 | if(attr&0x80)
|
---|
1503 | {
|
---|
1504 | outw(VGAREG_GRDC_ADDRESS, 0x1803);
|
---|
1505 | }
|
---|
1506 | else
|
---|
1507 | {
|
---|
1508 | outw(VGAREG_GRDC_ADDRESS, 0x0003);
|
---|
1509 | }
|
---|
1510 | for(i=0;i<cheight;i++)
|
---|
1511 | {
|
---|
1512 | dest=addr+i*nbcols;
|
---|
1513 | for(j=0;j<8;j++)
|
---|
1514 | {
|
---|
1515 | mask=0x80>>j;
|
---|
1516 | outw(VGAREG_GRDC_ADDRESS, (mask << 8) | 0x08);
|
---|
1517 | readx_byte(0xa000,dest);
|
---|
1518 | if(fdata[src+i]&mask)
|
---|
1519 | {
|
---|
1520 | write_byte(0xa000,dest,attr&0x0f);
|
---|
1521 | }
|
---|
1522 | else
|
---|
1523 | {
|
---|
1524 | write_byte(0xa000,dest,0x00);
|
---|
1525 | }
|
---|
1526 | }
|
---|
1527 | }
|
---|
1528 | outw(VGAREG_GRDC_ADDRESS, 0xff08);
|
---|
1529 | outw(VGAREG_GRDC_ADDRESS, 0x0005);
|
---|
1530 | outw(VGAREG_GRDC_ADDRESS, 0x0003);
|
---|
1531 | }
|
---|
1532 |
|
---|
1533 | // --------------------------------------------------------------------------------------------
|
---|
1534 | static void write_gfx_char_cga(uint8_t car, uint8_t attr, uint8_t xcurs,
|
---|
1535 | uint8_t ycurs, uint8_t nbcols, uint8_t bpp)
|
---|
1536 | {
|
---|
1537 | uint8_t i,j,mask,data;
|
---|
1538 | uint8_t *fdata;
|
---|
1539 | uint16_t addr,dest,src;
|
---|
1540 |
|
---|
1541 | fdata = &vgafont8;
|
---|
1542 | addr=(xcurs*bpp)+ycurs*320;
|
---|
1543 | src = car * 8;
|
---|
1544 | for(i=0;i<8;i++)
|
---|
1545 | {
|
---|
1546 | dest=addr+(i>>1)*80;
|
---|
1547 | if (i & 1) dest += 0x2000;
|
---|
1548 | mask = 0x80;
|
---|
1549 | /* NB: In 1bpp modes, the attribute is ignored, only the XOR flag has meaning. */
|
---|
1550 | if (bpp == 1)
|
---|
1551 | {
|
---|
1552 | if (attr & 0x80)
|
---|
1553 | {
|
---|
1554 | data = read_byte(0xb800,dest);
|
---|
1555 | data ^= fdata[src+i];
|
---|
1556 | }
|
---|
1557 | else
|
---|
1558 | {
|
---|
1559 | data = fdata[src+i];
|
---|
1560 | }
|
---|
1561 | write_byte(0xb800,dest,data);
|
---|
1562 | }
|
---|
1563 | else
|
---|
1564 | {
|
---|
1565 | while (mask > 0)
|
---|
1566 | {
|
---|
1567 | if (attr & 0x80)
|
---|
1568 | {
|
---|
1569 | data = read_byte(0xb800,dest);
|
---|
1570 | }
|
---|
1571 | else
|
---|
1572 | {
|
---|
1573 | data = 0x00;
|
---|
1574 | }
|
---|
1575 | for(j=0;j<4;j++)
|
---|
1576 | {
|
---|
1577 | if (fdata[src+i] & mask)
|
---|
1578 | {
|
---|
1579 | if (attr & 0x80)
|
---|
1580 | {
|
---|
1581 | data ^= (attr & 0x03) << ((3-j)*2);
|
---|
1582 | }
|
---|
1583 | else
|
---|
1584 | {
|
---|
1585 | data |= (attr & 0x03) << ((3-j)*2);
|
---|
1586 | }
|
---|
1587 | }
|
---|
1588 | mask >>= 1;
|
---|
1589 | }
|
---|
1590 | write_byte(0xb800,dest,data);
|
---|
1591 | dest += 1;
|
---|
1592 | }
|
---|
1593 | }
|
---|
1594 | }
|
---|
1595 | }
|
---|
1596 |
|
---|
1597 | // --------------------------------------------------------------------------------------------
|
---|
1598 | static void write_gfx_char_lin(uint8_t car, uint8_t attr, uint8_t xcurs,
|
---|
1599 | uint8_t ycurs, uint8_t nbcols)
|
---|
1600 | {
|
---|
1601 | uint8_t i,j,mask,data;
|
---|
1602 | uint8_t *fdata;
|
---|
1603 | uint16_t addr,dest,src;
|
---|
1604 |
|
---|
1605 | fdata = &vgafont8;
|
---|
1606 | addr=xcurs*8+ycurs*nbcols*64;
|
---|
1607 | src = car * 8;
|
---|
1608 | for(i=0;i<8;i++)
|
---|
1609 | {
|
---|
1610 | dest=addr+i*nbcols*8;
|
---|
1611 | mask = 0x80;
|
---|
1612 | for(j=0;j<8;j++)
|
---|
1613 | {
|
---|
1614 | data = 0x00;
|
---|
1615 | if (fdata[src+i] & mask)
|
---|
1616 | {
|
---|
1617 | data = attr;
|
---|
1618 | }
|
---|
1619 | write_byte(0xa000,dest+j,data);
|
---|
1620 | mask >>= 1;
|
---|
1621 | }
|
---|
1622 | }
|
---|
1623 | }
|
---|
1624 |
|
---|
1625 | // --------------------------------------------------------------------------------------------
|
---|
1626 | static void biosfn_write_char_attr(uint8_t car, uint8_t page, uint8_t attr, uint16_t count)
|
---|
1627 | {
|
---|
1628 | uint8_t cheight,xcurs,ycurs,mode,line,bpp;
|
---|
1629 | uint16_t nbcols,nbrows,address;
|
---|
1630 | uint16_t cursor,dummy;
|
---|
1631 |
|
---|
1632 | // Get the mode
|
---|
1633 | mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE);
|
---|
1634 | line=find_vga_entry(mode);
|
---|
1635 | if(line==0xFF)return;
|
---|
1636 |
|
---|
1637 | // Get the cursor pos for the page
|
---|
1638 | vga_get_cursor_pos(page,&dummy,&cursor);
|
---|
1639 | xcurs=cursor&0x00ff;ycurs=(cursor&0xff00)>>8;
|
---|
1640 |
|
---|
1641 | // Get the dimensions
|
---|
1642 | nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1;
|
---|
1643 | nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
1644 |
|
---|
1645 | if(vga_modes[line].class==TEXT)
|
---|
1646 | {
|
---|
1647 | // Compute the address
|
---|
1648 | address=SCREEN_MEM_START(nbcols,nbrows,page)+(xcurs+ycurs*nbcols)*2;
|
---|
1649 |
|
---|
1650 | dummy=((uint16_t)attr<<8)+car;
|
---|
1651 | memsetw(vga_modes[line].sstart,address,dummy,count);
|
---|
1652 | }
|
---|
1653 | else
|
---|
1654 | {
|
---|
1655 | // FIXME gfx mode not complete
|
---|
1656 | cheight=video_param_table[line_to_vpti[line]].cheight;
|
---|
1657 | bpp=vga_modes[line].pixbits;
|
---|
1658 | while(count-->0)
|
---|
1659 | {
|
---|
1660 | switch(vga_modes[line].memmodel)
|
---|
1661 | {
|
---|
1662 | case PLANAR1:
|
---|
1663 | attr |= 0x01; /* Color is ignored in 1bpp modes, always foreground. */
|
---|
1664 | case PLANAR4:
|
---|
1665 | write_gfx_char_pl4(car,attr,xcurs,ycurs,nbcols,cheight,page);
|
---|
1666 | break;
|
---|
1667 | case CGA:
|
---|
1668 | write_gfx_char_cga(car,attr,xcurs,ycurs,nbcols,bpp);
|
---|
1669 | break;
|
---|
1670 | case LINEAR8:
|
---|
1671 | write_gfx_char_lin(car,attr,xcurs,ycurs,nbcols);
|
---|
1672 | break;
|
---|
1673 | #ifdef VGA_DEBUG
|
---|
1674 | default:
|
---|
1675 | unimplemented();
|
---|
1676 | #endif
|
---|
1677 | }
|
---|
1678 | xcurs++;
|
---|
1679 | }
|
---|
1680 | }
|
---|
1681 | }
|
---|
1682 |
|
---|
1683 | // --------------------------------------------------------------------------------------------
|
---|
1684 | static void biosfn_write_char_only(uint8_t car, uint8_t page, uint8_t attr, uint16_t count)
|
---|
1685 | {
|
---|
1686 | uint8_t cheight,xcurs,ycurs,mode,line,bpp;
|
---|
1687 | uint16_t nbcols,nbrows,address;
|
---|
1688 | uint16_t cursor,dummy;
|
---|
1689 |
|
---|
1690 | // Get the mode
|
---|
1691 | mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE);
|
---|
1692 | line=find_vga_entry(mode);
|
---|
1693 | if(line==0xFF)return;
|
---|
1694 |
|
---|
1695 | // Get the cursor pos for the page
|
---|
1696 | vga_get_cursor_pos(page,&dummy,&cursor);
|
---|
1697 | xcurs=cursor&0x00ff;ycurs=(cursor&0xff00)>>8;
|
---|
1698 |
|
---|
1699 | // Get the dimensions
|
---|
1700 | nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1;
|
---|
1701 | nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
1702 |
|
---|
1703 | if(vga_modes[line].class==TEXT)
|
---|
1704 | {
|
---|
1705 | // Compute the address
|
---|
1706 | address=SCREEN_MEM_START(nbcols,nbrows,page)+(xcurs+ycurs*nbcols)*2;
|
---|
1707 |
|
---|
1708 | while(count-->0)
|
---|
1709 | {write_byte(vga_modes[line].sstart,address,car);
|
---|
1710 | address+=2;
|
---|
1711 | }
|
---|
1712 | }
|
---|
1713 | else
|
---|
1714 | {
|
---|
1715 | // FIXME gfx mode not complete
|
---|
1716 | cheight=video_param_table[line_to_vpti[line]].cheight;
|
---|
1717 | bpp=vga_modes[line].pixbits;
|
---|
1718 | while(count-->0)
|
---|
1719 | {
|
---|
1720 | switch(vga_modes[line].memmodel)
|
---|
1721 | {
|
---|
1722 | case PLANAR1:
|
---|
1723 | attr |= 0x01; /* Color is ignored in 1bpp modes, always foreground. */
|
---|
1724 | case PLANAR4:
|
---|
1725 | write_gfx_char_pl4(car,attr,xcurs,ycurs,nbcols,cheight,page);
|
---|
1726 | break;
|
---|
1727 | case CGA:
|
---|
1728 | write_gfx_char_cga(car,attr,xcurs,ycurs,nbcols,bpp);
|
---|
1729 | break;
|
---|
1730 | case LINEAR8:
|
---|
1731 | write_gfx_char_lin(car,attr,xcurs,ycurs,nbcols);
|
---|
1732 | break;
|
---|
1733 | #ifdef VGA_DEBUG
|
---|
1734 | default:
|
---|
1735 | unimplemented();
|
---|
1736 | #endif
|
---|
1737 | }
|
---|
1738 | xcurs++;
|
---|
1739 | }
|
---|
1740 | }
|
---|
1741 | }
|
---|
1742 |
|
---|
1743 | // --------------------------------------------------------------------------------------------
|
---|
1744 | static void biosfn_write_pixel(uint8_t BH, uint8_t AL, uint16_t CX, uint16_t DX)
|
---|
1745 | {
|
---|
1746 | uint8_t mode,line,mask,attr,data;
|
---|
1747 | uint16_t addr;
|
---|
1748 |
|
---|
1749 | // Get the mode
|
---|
1750 | mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE);
|
---|
1751 | line=find_vga_entry(mode);
|
---|
1752 | if(line==0xFF)return;
|
---|
1753 | if(vga_modes[line].class==TEXT)return;
|
---|
1754 |
|
---|
1755 | switch(vga_modes[line].memmodel)
|
---|
1756 | {
|
---|
1757 | case PLANAR4:
|
---|
1758 | case PLANAR1:
|
---|
1759 | addr = CX/8+DX*read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
1760 | addr += read_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE) * BH;
|
---|
1761 | mask = 0x80 >> (CX & 0x07);
|
---|
1762 | outw(VGAREG_GRDC_ADDRESS, (mask << 8) | 0x08);
|
---|
1763 | outw(VGAREG_GRDC_ADDRESS, 0x0205);
|
---|
1764 | data = readx_byte(0xa000,addr);
|
---|
1765 | if (AL & 0x80)
|
---|
1766 | {
|
---|
1767 | outw(VGAREG_GRDC_ADDRESS, 0x1803);
|
---|
1768 | }
|
---|
1769 | write_byte(0xa000,addr,AL);
|
---|
1770 | outw(VGAREG_GRDC_ADDRESS, 0xff08);
|
---|
1771 | outw(VGAREG_GRDC_ADDRESS, 0x0005);
|
---|
1772 | outw(VGAREG_GRDC_ADDRESS, 0x0003);
|
---|
1773 | break;
|
---|
1774 | case CGA:
|
---|
1775 | if(vga_modes[line].pixbits==2)
|
---|
1776 | {
|
---|
1777 | addr=(CX>>2)+(DX>>1)*80;
|
---|
1778 | }
|
---|
1779 | else
|
---|
1780 | {
|
---|
1781 | addr=(CX>>3)+(DX>>1)*80;
|
---|
1782 | }
|
---|
1783 | if (DX & 1) addr += 0x2000;
|
---|
1784 | data = read_byte(0xb800,addr);
|
---|
1785 | if(vga_modes[line].pixbits==2)
|
---|
1786 | {
|
---|
1787 | attr = (AL & 0x03) << ((3 - (CX & 0x03)) * 2);
|
---|
1788 | mask = 0x03 << ((3 - (CX & 0x03)) * 2);
|
---|
1789 | }
|
---|
1790 | else
|
---|
1791 | {
|
---|
1792 | attr = (AL & 0x01) << (7 - (CX & 0x07));
|
---|
1793 | mask = 0x01 << (7 - (CX & 0x07));
|
---|
1794 | }
|
---|
1795 | if (AL & 0x80)
|
---|
1796 | {
|
---|
1797 | data ^= attr;
|
---|
1798 | }
|
---|
1799 | else
|
---|
1800 | {
|
---|
1801 | data &= ~mask;
|
---|
1802 | data |= attr;
|
---|
1803 | }
|
---|
1804 | write_byte(0xb800,addr,data);
|
---|
1805 | break;
|
---|
1806 | case LINEAR8:
|
---|
1807 | addr=CX+DX*(read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS)*8);
|
---|
1808 | write_byte(0xa000,addr,AL);
|
---|
1809 | break;
|
---|
1810 | #ifdef VGA_DEBUG
|
---|
1811 | default:
|
---|
1812 | unimplemented();
|
---|
1813 | #endif
|
---|
1814 | }
|
---|
1815 | }
|
---|
1816 |
|
---|
1817 | // --------------------------------------------------------------------------------------------
|
---|
1818 | static void biosfn_write_teletype(uint8_t car, uint8_t page, uint8_t attr, uint8_t flag)
|
---|
1819 | {// flag = WITH_ATTR / NO_ATTR
|
---|
1820 |
|
---|
1821 | uint8_t cheight,xcurs,ycurs,mode,line,bpp;
|
---|
1822 | uint16_t nbcols,nbrows,address;
|
---|
1823 | uint16_t cursor,dummy;
|
---|
1824 |
|
---|
1825 | // special case if page is 0xff, use current page
|
---|
1826 | if(page==0xff)
|
---|
1827 | page=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE);
|
---|
1828 |
|
---|
1829 | // Get the mode
|
---|
1830 | mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE);
|
---|
1831 | line=find_vga_entry(mode);
|
---|
1832 | if(line==0xFF)return;
|
---|
1833 |
|
---|
1834 | // Get the cursor pos for the page
|
---|
1835 | vga_get_cursor_pos(page,&dummy,&cursor);
|
---|
1836 | xcurs=cursor&0x00ff;ycurs=(cursor&0xff00)>>8;
|
---|
1837 |
|
---|
1838 | // Get the dimensions
|
---|
1839 | nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1;
|
---|
1840 | nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
1841 |
|
---|
1842 | switch(car)
|
---|
1843 | {
|
---|
1844 | case '\a': // ASCII 0x07, BEL
|
---|
1845 | //FIXME should beep
|
---|
1846 | break;
|
---|
1847 |
|
---|
1848 | case '\b': // ASCII 0x08, BS
|
---|
1849 | if(xcurs>0)xcurs--;
|
---|
1850 | break;
|
---|
1851 |
|
---|
1852 | case '\n': // ASCII 0x0A, LF
|
---|
1853 | ycurs++;
|
---|
1854 | break;
|
---|
1855 |
|
---|
1856 | case '\r': // ASCII 0x0D, CR
|
---|
1857 | xcurs=0;
|
---|
1858 | break;
|
---|
1859 |
|
---|
1860 | default:
|
---|
1861 |
|
---|
1862 | if(vga_modes[line].class==TEXT)
|
---|
1863 | {
|
---|
1864 | // Compute the address
|
---|
1865 | address=SCREEN_MEM_START(nbcols,nbrows,page)+(xcurs+ycurs*nbcols)*2;
|
---|
1866 |
|
---|
1867 | // Write the char
|
---|
1868 | write_byte(vga_modes[line].sstart,address,car);
|
---|
1869 |
|
---|
1870 | if(flag==WITH_ATTR)
|
---|
1871 | write_byte(vga_modes[line].sstart,address+1,attr);
|
---|
1872 | }
|
---|
1873 | else
|
---|
1874 | {
|
---|
1875 | // FIXME gfx mode not complete
|
---|
1876 | cheight=video_param_table[line_to_vpti[line]].cheight;
|
---|
1877 | bpp=vga_modes[line].pixbits;
|
---|
1878 | switch(vga_modes[line].memmodel)
|
---|
1879 | {
|
---|
1880 | case PLANAR1:
|
---|
1881 | attr |= 0x01; /* Color is ignored in 1bpp modes, always foreground. */
|
---|
1882 | case PLANAR4:
|
---|
1883 | write_gfx_char_pl4(car,attr,xcurs,ycurs,nbcols,cheight,page);
|
---|
1884 | break;
|
---|
1885 | case CGA:
|
---|
1886 | write_gfx_char_cga(car,attr,xcurs,ycurs,nbcols,bpp);
|
---|
1887 | break;
|
---|
1888 | case LINEAR8:
|
---|
1889 | write_gfx_char_lin(car,attr,xcurs,ycurs,nbcols);
|
---|
1890 | break;
|
---|
1891 | #ifdef VGA_DEBUG
|
---|
1892 | default:
|
---|
1893 | unimplemented();
|
---|
1894 | #endif
|
---|
1895 | }
|
---|
1896 | }
|
---|
1897 | xcurs++;
|
---|
1898 | // Do we need to wrap ?
|
---|
1899 | if(xcurs==nbcols)
|
---|
1900 | {xcurs=0;
|
---|
1901 | ycurs++;
|
---|
1902 | }
|
---|
1903 | }
|
---|
1904 |
|
---|
1905 | // Do we need to scroll ?
|
---|
1906 | if(ycurs==nbrows)
|
---|
1907 | {
|
---|
1908 | if(vga_modes[line].class==TEXT)
|
---|
1909 | {
|
---|
1910 | address=SCREEN_MEM_START(nbcols,nbrows,page)+(xcurs+(ycurs-1)*nbcols)*2;
|
---|
1911 | attr=read_byte(vga_modes[line].sstart,address+1);
|
---|
1912 | biosfn_scroll(0x01,attr,0,0,nbrows-1,nbcols-1,page,SCROLL_UP);
|
---|
1913 | }
|
---|
1914 | else
|
---|
1915 | {
|
---|
1916 | biosfn_scroll(0x01,0x00,0,0,nbrows-1,nbcols-1,page,SCROLL_UP);
|
---|
1917 | }
|
---|
1918 | ycurs-=1;
|
---|
1919 | }
|
---|
1920 |
|
---|
1921 | // Set the cursor for the page
|
---|
1922 | cursor=ycurs; cursor<<=8; cursor+=xcurs;
|
---|
1923 | biosfn_set_cursor_pos(page,cursor);
|
---|
1924 | }
|
---|
1925 |
|
---|
1926 | // --------------------------------------------------------------------------------------------
|
---|
1927 | static void get_font_access(void)
|
---|
1928 | {
|
---|
1929 | outw(VGAREG_GRDC_ADDRESS, 0x0005);
|
---|
1930 | outb(VGAREG_GRDC_ADDRESS, 0x06);
|
---|
1931 | outw(VGAREG_GRDC_ADDRESS, (((0x04 | (inb(VGAREG_GRDC_DATA) & 0x01)) << 8) | 0x06));
|
---|
1932 | outw(VGAREG_SEQU_ADDRESS, 0x0402);
|
---|
1933 | outw(VGAREG_SEQU_ADDRESS, 0x0604);
|
---|
1934 | }
|
---|
1935 |
|
---|
1936 | static void release_font_access(void)
|
---|
1937 | {
|
---|
1938 | outw(VGAREG_GRDC_ADDRESS, (((0x0a | ((inb(VGAREG_READ_MISC_OUTPUT) & 0x01) << 2)) << 8) | 0x06));
|
---|
1939 | outw(VGAREG_GRDC_ADDRESS, 0x1005);
|
---|
1940 | outw(VGAREG_SEQU_ADDRESS, 0x0302);
|
---|
1941 | outw(VGAREG_SEQU_ADDRESS, 0x0204);
|
---|
1942 | }
|
---|
1943 |
|
---|
1944 | static void set_scan_lines(uint8_t lines)
|
---|
1945 | {
|
---|
1946 | uint16_t crtc_addr,cols,vde;
|
---|
1947 | uint8_t crtc_r9,ovl,rows;
|
---|
1948 |
|
---|
1949 | crtc_addr = read_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS);
|
---|
1950 | outb(crtc_addr, 0x09);
|
---|
1951 | crtc_r9 = inb(crtc_addr+1);
|
---|
1952 | crtc_r9 = (crtc_r9 & 0xe0) | (lines - 1);
|
---|
1953 | outb(crtc_addr+1, crtc_r9);
|
---|
1954 | if(lines==8)
|
---|
1955 | {
|
---|
1956 | biosfn_set_cursor_shape(0x06,0x07);
|
---|
1957 | }
|
---|
1958 | else
|
---|
1959 | {
|
---|
1960 | biosfn_set_cursor_shape(lines-4,lines-3);
|
---|
1961 | }
|
---|
1962 | write_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT, lines);
|
---|
1963 | outb(crtc_addr, 0x12);
|
---|
1964 | vde = inb(crtc_addr+1);
|
---|
1965 | outb(crtc_addr, 0x07);
|
---|
1966 | ovl = inb(crtc_addr+1);
|
---|
1967 | vde += (((ovl & 0x02) << 7) + ((ovl & 0x40) << 3) + 1);
|
---|
1968 | rows = vde / lines;
|
---|
1969 | write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, rows-1);
|
---|
1970 | cols = read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
|
---|
1971 | write_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE, rows * cols * 2);
|
---|
1972 | }
|
---|
1973 |
|
---|
1974 | static void biosfn_set_font_block(uint8_t BL)
|
---|
1975 | {
|
---|
1976 | outw(VGAREG_SEQU_ADDRESS, 0x0100);
|
---|
1977 | outw(VGAREG_SEQU_ADDRESS, 0x0003 | (BL << 8));
|
---|
1978 | outw(VGAREG_SEQU_ADDRESS, 0x0300);
|
---|
1979 | }
|
---|
1980 |
|
---|
1981 | static void load_text_patch(uint16_t ES, uint16_t BP, uint8_t BL, uint8_t BH)
|
---|
1982 | {
|
---|
1983 | uint16_t blockaddr, dest, src;
|
---|
1984 | uint8_t __far *pat;
|
---|
1985 |
|
---|
1986 | get_font_access();
|
---|
1987 |
|
---|
1988 | blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
|
---|
1989 | pat = ES :> (uint8_t *)BP;
|
---|
1990 | src = BP + 1;
|
---|
1991 | while (*pat) {
|
---|
1992 | dest = blockaddr + *pat * 32;
|
---|
1993 | memcpyb(0xA000, dest, ES, src, BH);
|
---|
1994 | src += BH + 1;
|
---|
1995 | pat += BH + 1;
|
---|
1996 | }
|
---|
1997 |
|
---|
1998 | release_font_access();
|
---|
1999 | }
|
---|
2000 |
|
---|
2001 | static void biosfn_load_text_user_pat(uint8_t AL, uint16_t ES, uint16_t BP, uint16_t CX,
|
---|
2002 | uint16_t DX, uint8_t BL, uint8_t BH)
|
---|
2003 | {
|
---|
2004 | uint16_t blockaddr,dest,i,src;
|
---|
2005 |
|
---|
2006 | get_font_access();
|
---|
2007 | blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
|
---|
2008 | for(i=0;i<CX;i++)
|
---|
2009 | {
|
---|
2010 | src = BP + i * BH;
|
---|
2011 | dest = blockaddr + (DX + i) * 32;
|
---|
2012 | memcpyb(0xA000, dest, ES, src, BH);
|
---|
2013 | }
|
---|
2014 | release_font_access();
|
---|
2015 | if(AL>=0x10)
|
---|
2016 | {
|
---|
2017 | set_scan_lines(BH);
|
---|
2018 | }
|
---|
2019 | }
|
---|
2020 |
|
---|
2021 | static void biosfn_load_gfx_8_8_chars(uint16_t ES, uint16_t BP)
|
---|
2022 | {
|
---|
2023 | set_int_vector(0x1F, ES:>BP);
|
---|
2024 | }
|
---|
2025 |
|
---|
2026 | static void set_gfx_font(void _far *font, uint16_t cheight, uint8_t row_code, uint8_t rows)
|
---|
2027 | {
|
---|
2028 | static uint8_t row_tbl[] = { 0, 14, 25, 43 };
|
---|
2029 |
|
---|
2030 | set_int_vector(0x43, font);
|
---|
2031 | if (row_code) {
|
---|
2032 | if (row_code > 3)
|
---|
2033 | row_code = 2; /* Default to 25 rows. */
|
---|
2034 | rows = row_tbl[row_code];
|
---|
2035 | }
|
---|
2036 | /* Else 'rows' used as is. */
|
---|
2037 |
|
---|
2038 | write_word(BIOSMEM_SEG, BIOSMEM_CHAR_HEIGHT, cheight);
|
---|
2039 | write_word(BIOSMEM_SEG, BIOSMEM_NB_ROWS, rows - 1);
|
---|
2040 | }
|
---|
2041 |
|
---|
2042 | static void biosfn_load_gfx_user_chars(uint16_t ES, uint16_t BP, uint16_t CX,
|
---|
2043 | uint8_t BL, uint8_t DL)
|
---|
2044 | {
|
---|
2045 | set_gfx_font(ES:>BP, CX, BL, DL);
|
---|
2046 | }
|
---|
2047 |
|
---|
2048 | /* Some references (RBIL) suggest that only BL is used; that is wrong,
|
---|
2049 | * all of these subfunctions will use DL if BL is zero.
|
---|
2050 | */
|
---|
2051 | static void biosfn_load_gfx_8_14_chars(uint8_t BL, uint8_t DL)
|
---|
2052 | {
|
---|
2053 | set_gfx_font(vgafont14, 14, BL, DL);
|
---|
2054 | }
|
---|
2055 | static void biosfn_load_gfx_8_8_dd_chars(uint8_t BL, uint8_t DL)
|
---|
2056 | {
|
---|
2057 | set_gfx_font(vgafont8, 8, BL, DL);
|
---|
2058 | }
|
---|
2059 | static void biosfn_load_gfx_8_16_chars(uint8_t BL, uint8_t DL)
|
---|
2060 | {
|
---|
2061 | set_gfx_font(vgafont16, 16, BL, DL);
|
---|
2062 | }
|
---|
2063 | // --------------------------------------------------------------------------------------------
|
---|
2064 | static void biosfn_alternate_prtsc(void)
|
---|
2065 | {
|
---|
2066 | #ifdef VGA_DEBUG
|
---|
2067 | unimplemented();
|
---|
2068 | #endif
|
---|
2069 | }
|
---|
2070 | // --------------------------------------------------------------------------------------------
|
---|
2071 | static void biosfn_set_txt_lines(uint8_t AL)
|
---|
2072 | {
|
---|
2073 | uint8_t mctl;
|
---|
2074 |
|
---|
2075 | /* Read byte at 40:89. */
|
---|
2076 | mctl = read_byte(BIOSMEM_SEG, BIOSMEM_MODESET_CTL);
|
---|
2077 | mctl = mctl & 0x6F; /* Clear 400/200 line flags. */
|
---|
2078 |
|
---|
2079 | switch (AL) /* AL was already validated to be in 0-2 range. */
|
---|
2080 | {
|
---|
2081 | case 0: /* 200 lines. */
|
---|
2082 | mctl |= 0x80;
|
---|
2083 | break;
|
---|
2084 | case 2: /* 400 lines. */
|
---|
2085 | mctl |= 0x10;
|
---|
2086 | break;
|
---|
2087 | }
|
---|
2088 | write_byte(BIOSMEM_SEG, BIOSMEM_MODESET_CTL, mctl);
|
---|
2089 | }
|
---|
2090 |
|
---|
2091 | // --------------------------------------------------------------------------------------------
|
---|
2092 | static void biosfn_switch_video_interface (AL,ES,DX) uint8_t AL;uint16_t ES;uint16_t DX;
|
---|
2093 | {
|
---|
2094 | #ifdef VGA_DEBUG
|
---|
2095 | unimplemented();
|
---|
2096 | #endif
|
---|
2097 | }
|
---|
2098 | static void biosfn_enable_video_refresh_control(uint8_t AL)
|
---|
2099 | {
|
---|
2100 | #ifdef VGA_DEBUG
|
---|
2101 | unimplemented();
|
---|
2102 | #endif
|
---|
2103 | }
|
---|
2104 |
|
---|
2105 | // --------------------------------------------------------------------------------------------
|
---|
2106 | static void biosfn_write_string(uint8_t flag, uint8_t page, uint8_t attr, uint16_t count,
|
---|
2107 | uint8_t row, uint8_t col, uint16_t seg, uint16_t offset)
|
---|
2108 | {
|
---|
2109 | uint16_t newcurs,oldcurs,dummy;
|
---|
2110 | uint8_t car;
|
---|
2111 |
|
---|
2112 | // Read curs info for the page
|
---|
2113 | vga_get_cursor_pos(page,&dummy,&oldcurs);
|
---|
2114 |
|
---|
2115 | // if row=0xff special case : use current cursor position
|
---|
2116 | if(row==0xff)
|
---|
2117 | {col=oldcurs&0x00ff;
|
---|
2118 | row=(oldcurs&0xff00)>>8;
|
---|
2119 | }
|
---|
2120 |
|
---|
2121 | newcurs=row; newcurs<<=8; newcurs+=col;
|
---|
2122 | biosfn_set_cursor_pos(page,newcurs);
|
---|
2123 |
|
---|
2124 | while(count--!=0)
|
---|
2125 | {
|
---|
2126 | car=read_byte(seg,offset++);
|
---|
2127 | if((flag&0x02)!=0)
|
---|
2128 | attr=read_byte(seg,offset++);
|
---|
2129 |
|
---|
2130 | biosfn_write_teletype(car,page,attr,WITH_ATTR);
|
---|
2131 | }
|
---|
2132 |
|
---|
2133 | // Set back curs pos
|
---|
2134 | if((flag&0x01)==0)
|
---|
2135 | biosfn_set_cursor_pos(page,oldcurs);
|
---|
2136 | }
|
---|
2137 |
|
---|
2138 | // --------------------------------------------------------------------------------------------
|
---|
2139 | static void biosfn_read_state_info(uint16_t BX, uint16_t ES, uint16_t DI)
|
---|
2140 | {
|
---|
2141 | uint16_t pg_sz;
|
---|
2142 | uint16_t scans;
|
---|
2143 | uint8_t mode;
|
---|
2144 | uint8_t mctl;
|
---|
2145 | uint8_t temp;
|
---|
2146 |
|
---|
2147 | mode = read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE);
|
---|
2148 | pg_sz = read_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE);
|
---|
2149 | // Address of static functionality table
|
---|
2150 | write_dword(ES,DI+0x00, (uint32_t)(void __far *)static_functionality);
|
---|
2151 |
|
---|
2152 | // A lot is a straight copy from the BDA. Note that the number
|
---|
2153 | // of character rows in the BDA is zero-based but one-based in
|
---|
2154 | // the dynamic state area
|
---|
2155 | memcpyb(ES,DI+0x04,BIOSMEM_SEG,BIOSMEM_CURRENT_MODE,30);
|
---|
2156 | write_byte(ES,DI+0x22,read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1);
|
---|
2157 | memcpyb(ES,DI+0x23,BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT,2);
|
---|
2158 |
|
---|
2159 | write_byte(ES,DI+0x25,read_byte(BIOSMEM_SEG,BIOSMEM_DCC_INDEX));
|
---|
2160 | write_byte(ES,DI+0x26,0); // Alternate display code
|
---|
2161 | write_word(ES,DI+0x27,16); // Number of colors
|
---|
2162 | write_byte(ES,DI+0x29,8); // Number of pages
|
---|
2163 | write_byte(ES,DI+0x2a,2); // Vertical resolution specifier
|
---|
2164 | write_byte(ES,DI+0x2b,0); // Primary font block
|
---|
2165 | write_byte(ES,DI+0x2c,0); // Secondary font block
|
---|
2166 | write_byte(ES,DI+0x2d,0x21);
|
---|
2167 | write_byte(ES,DI+0x31,3); // 256K video RAM
|
---|
2168 | write_byte(ES,DI+0x32,0); // Save pointer state information
|
---|
2169 |
|
---|
2170 | mctl = read_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL);
|
---|
2171 |
|
---|
2172 | /* Extract and write the vertical resolution specifier bits. */
|
---|
2173 | scans = ((mctl & 0x80) >> 6) | ((mctl & 0x10) >> 4);
|
---|
2174 | switch (scans) {
|
---|
2175 | case 0: temp = 1; break; /* 350 lines */
|
---|
2176 | case 1: temp = 2; break; /* 400 lines */
|
---|
2177 | default:
|
---|
2178 | case 2: temp = 0; break; /* 200 lines */
|
---|
2179 | }
|
---|
2180 | write_byte(ES,DI+0x2a,temp);
|
---|
2181 |
|
---|
2182 | /* Patch up the data for graphics modes. */
|
---|
2183 | if (mode >= 0x0E && mode <= 0x12) {
|
---|
2184 | if (pg_sz)
|
---|
2185 | write_byte(ES,DI+0x29,16384/(pg_sz >> 2));
|
---|
2186 | } else if (mode == 0x13) {
|
---|
2187 | write_byte(ES,DI+0x29,1); /* Just one page due to chaining */
|
---|
2188 | write_word(ES,DI+0x27,256); /* But 256!! colors!!! */
|
---|
2189 | } else if (mode >= 4 && mode <= 6) {
|
---|
2190 | /* CGA modes. */
|
---|
2191 | if (pg_sz)
|
---|
2192 | write_byte(ES,DI+0x29,16384/pg_sz);
|
---|
2193 | write_word(ES,DI+0x27,4);
|
---|
2194 | }
|
---|
2195 | if (mode == 6 || mode == 0x11)
|
---|
2196 | write_word(ES,DI+0x27,2); /* 2-color modes. */
|
---|
2197 |
|
---|
2198 | if ((mode >= 4) && (mode != 7)) {
|
---|
2199 | write_byte(ES,DI+0x2d,0x01);
|
---|
2200 | scans = (read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1) * read_byte(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT);
|
---|
2201 | switch (scans) {
|
---|
2202 | case 200: temp = 0; break;
|
---|
2203 | case 350: temp = 1; break;
|
---|
2204 | case 400: temp = 2; break;
|
---|
2205 | default:
|
---|
2206 | case 480: temp = 3; break;
|
---|
2207 | }
|
---|
2208 | write_byte(ES,DI+0x2a,temp);
|
---|
2209 | }
|
---|
2210 |
|
---|
2211 | memsetb(ES,DI+0x33,0,13);
|
---|
2212 | }
|
---|
2213 |
|
---|
2214 | // --------------------------------------------------------------------------------------------
|
---|
2215 | uint16_t biosfn_read_video_state_size2(uint16_t state)
|
---|
2216 | {
|
---|
2217 | uint16_t size;
|
---|
2218 |
|
---|
2219 | size = 0;
|
---|
2220 | if (state & 1)
|
---|
2221 | size += 0x46;
|
---|
2222 |
|
---|
2223 | if (state & 2)
|
---|
2224 | size += (5 + 8 + 5) * 2 + 6;
|
---|
2225 |
|
---|
2226 | if (state & 4)
|
---|
2227 | size += 3 + 256 * 3 + 1;
|
---|
2228 |
|
---|
2229 | return size;
|
---|
2230 | }
|
---|
2231 |
|
---|
2232 | static void vga_get_video_state_size(uint16_t state, uint16_t STACK_BASED *size)
|
---|
2233 | {
|
---|
2234 | /* The size is the number of 64-byte blocks required to save the state. */
|
---|
2235 | *size = (biosfn_read_video_state_size2(state) + 63) / 64;
|
---|
2236 | }
|
---|
2237 |
|
---|
2238 | uint16_t biosfn_save_video_state(uint16_t CX, uint16_t ES, uint16_t BX)
|
---|
2239 | {
|
---|
2240 | uint16_t i, crtc_addr, ar_index;
|
---|
2241 |
|
---|
2242 | crtc_addr = read_word(BIOSMEM_SEG, BIOSMEM_CRTC_ADDRESS);
|
---|
2243 | if (CX & 1) {
|
---|
2244 | write_byte(ES, BX, inb(VGAREG_SEQU_ADDRESS)); BX++;
|
---|
2245 | write_byte(ES, BX, inb(crtc_addr)); BX++;
|
---|
2246 | write_byte(ES, BX, inb(VGAREG_GRDC_ADDRESS)); BX++;
|
---|
2247 | inb(VGAREG_ACTL_RESET);
|
---|
2248 | ar_index = inb(VGAREG_ACTL_ADDRESS);
|
---|
2249 | write_byte(ES, BX, ar_index); BX++;
|
---|
2250 | write_byte(ES, BX, inb(VGAREG_READ_FEATURE_CTL)); BX++;
|
---|
2251 |
|
---|
2252 | for(i=1;i<=4;i++){
|
---|
2253 | outb(VGAREG_SEQU_ADDRESS, i);
|
---|
2254 | write_byte(ES, BX, inb(VGAREG_SEQU_DATA)); BX++;
|
---|
2255 | }
|
---|
2256 | outb(VGAREG_SEQU_ADDRESS, 0);
|
---|
2257 | write_byte(ES, BX, inb(VGAREG_SEQU_DATA)); BX++;
|
---|
2258 |
|
---|
2259 | for(i=0;i<=0x18;i++) {
|
---|
2260 | outb(crtc_addr,i);
|
---|
2261 | write_byte(ES, BX, inb(crtc_addr+1)); BX++;
|
---|
2262 | }
|
---|
2263 |
|
---|
2264 | for(i=0;i<=0x13;i++) {
|
---|
2265 | inb(VGAREG_ACTL_RESET); /* Reads do not toggle flip-flop! */
|
---|
2266 | outb(VGAREG_ACTL_ADDRESS, i | (ar_index & 0x20));
|
---|
2267 | write_byte(ES, BX, inb(VGAREG_ACTL_READ_DATA)); BX++;
|
---|
2268 | }
|
---|
2269 | inb(VGAREG_ACTL_RESET);
|
---|
2270 |
|
---|
2271 | for(i=0;i<=8;i++) {
|
---|
2272 | outb(VGAREG_GRDC_ADDRESS,i);
|
---|
2273 | write_byte(ES, BX, inb(VGAREG_GRDC_DATA)); BX++;
|
---|
2274 | }
|
---|
2275 |
|
---|
2276 | write_word(ES, BX, crtc_addr); BX+= 2;
|
---|
2277 |
|
---|
2278 | /* XXX: read plane latches */
|
---|
2279 | write_byte(ES, BX, 0); BX++;
|
---|
2280 | write_byte(ES, BX, 0); BX++;
|
---|
2281 | write_byte(ES, BX, 0); BX++;
|
---|
2282 | write_byte(ES, BX, 0); BX++;
|
---|
2283 | }
|
---|
2284 | if (CX & 2) {
|
---|
2285 | write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE)); BX++;
|
---|
2286 | write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS)); BX += 2;
|
---|
2287 | write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE)); BX += 2;
|
---|
2288 | write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS)); BX += 2;
|
---|
2289 | write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)); BX++;
|
---|
2290 | write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT)); BX += 2;
|
---|
2291 | write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL)); BX++;
|
---|
2292 | write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_SWITCHES)); BX++;
|
---|
2293 | write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL)); BX++;
|
---|
2294 | write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CURSOR_TYPE)); BX += 2;
|
---|
2295 | for(i=0;i<8;i++) {
|
---|
2296 | write_word(ES, BX, read_word(BIOSMEM_SEG, BIOSMEM_CURSOR_POS+2*i));
|
---|
2297 | BX += 2;
|
---|
2298 | }
|
---|
2299 | write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CURRENT_START)); BX += 2;
|
---|
2300 | write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE)); BX++;
|
---|
2301 | /* current font */
|
---|
2302 | write_word(ES, BX, read_word(0, 0x1f * 4)); BX += 2;
|
---|
2303 | write_word(ES, BX, read_word(0, 0x1f * 4 + 2)); BX += 2;
|
---|
2304 | write_word(ES, BX, read_word(0, 0x43 * 4)); BX += 2;
|
---|
2305 | write_word(ES, BX, read_word(0, 0x43 * 4 + 2)); BX += 2;
|
---|
2306 | }
|
---|
2307 | if (CX & 4) {
|
---|
2308 | /* XXX: check this */
|
---|
2309 | write_byte(ES, BX, inb(VGAREG_DAC_STATE)); BX++; /* read/write mode dac */
|
---|
2310 | write_byte(ES, BX, inb(VGAREG_DAC_WRITE_ADDRESS)); BX++; /* pix address */
|
---|
2311 | write_byte(ES, BX, inb(VGAREG_PEL_MASK)); BX++;
|
---|
2312 | // Set the whole dac always, from 0
|
---|
2313 | outb(VGAREG_DAC_WRITE_ADDRESS,0x00);
|
---|
2314 | for(i=0;i<256*3;i++) {
|
---|
2315 | write_byte(ES, BX, inb(VGAREG_DAC_DATA)); BX++;
|
---|
2316 | }
|
---|
2317 | write_byte(ES, BX, 0); BX++; /* color select register */
|
---|
2318 | }
|
---|
2319 | return BX;
|
---|
2320 | }
|
---|
2321 |
|
---|
2322 | uint16_t biosfn_restore_video_state(uint16_t CX, uint16_t ES, uint16_t BX)
|
---|
2323 | {
|
---|
2324 | uint16_t i, crtc_addr, v, addr1, ar_index;
|
---|
2325 |
|
---|
2326 | if (CX & 1) {
|
---|
2327 | // Reset Attribute Ctl flip-flop
|
---|
2328 | inb(VGAREG_ACTL_RESET);
|
---|
2329 |
|
---|
2330 | crtc_addr = read_word(ES, BX + 0x40);
|
---|
2331 | addr1 = BX;
|
---|
2332 | BX += 5;
|
---|
2333 |
|
---|
2334 | for(i=1;i<=4;i++){
|
---|
2335 | outb(VGAREG_SEQU_ADDRESS, i);
|
---|
2336 | outb(VGAREG_SEQU_DATA, read_byte(ES, BX)); BX++;
|
---|
2337 | }
|
---|
2338 | outb(VGAREG_SEQU_ADDRESS, 0);
|
---|
2339 | outb(VGAREG_SEQU_DATA, read_byte(ES, BX)); BX++;
|
---|
2340 |
|
---|
2341 | // select crtc base address
|
---|
2342 | v = inb(VGAREG_READ_MISC_OUTPUT) & ~0x01;
|
---|
2343 | if (crtc_addr == 0x3d4)
|
---|
2344 | v |= 0x01;
|
---|
2345 | outb(VGAREG_WRITE_MISC_OUTPUT, v);
|
---|
2346 |
|
---|
2347 | // Disable CRTC write protection
|
---|
2348 | outw(crtc_addr,0x0011);
|
---|
2349 | // Set CRTC regs
|
---|
2350 | for(i=0;i<=0x18;i++) {
|
---|
2351 | if (i != 0x11) {
|
---|
2352 | outb(crtc_addr,i);
|
---|
2353 | outb(crtc_addr+1, read_byte(ES, BX));
|
---|
2354 | }
|
---|
2355 | BX++;
|
---|
2356 | }
|
---|
2357 | // enable write protection if needed
|
---|
2358 | outb(crtc_addr, 0x11);
|
---|
2359 | outb(crtc_addr+1, read_byte(ES, BX - 0x18 + 0x11));
|
---|
2360 |
|
---|
2361 | // Set Attribute Ctl
|
---|
2362 | ar_index = read_byte(ES, addr1 + 0x03);
|
---|
2363 | inb(VGAREG_ACTL_RESET);
|
---|
2364 | for(i=0;i<=0x13;i++) {
|
---|
2365 | outb(VGAREG_ACTL_ADDRESS, i | (ar_index & 0x20));
|
---|
2366 | outb(VGAREG_ACTL_WRITE_DATA, read_byte(ES, BX)); BX++;
|
---|
2367 | }
|
---|
2368 | outb(VGAREG_ACTL_ADDRESS, ar_index);
|
---|
2369 | inb(VGAREG_ACTL_RESET);
|
---|
2370 |
|
---|
2371 | for(i=0;i<=8;i++) {
|
---|
2372 | outb(VGAREG_GRDC_ADDRESS,i);
|
---|
2373 | outb(VGAREG_GRDC_DATA, read_byte(ES, BX)); BX++;
|
---|
2374 | }
|
---|
2375 | BX += 2; /* crtc_addr */
|
---|
2376 | BX += 4; /* plane latches */
|
---|
2377 |
|
---|
2378 | outb(VGAREG_SEQU_ADDRESS, read_byte(ES, addr1)); addr1++;
|
---|
2379 | outb(crtc_addr, read_byte(ES, addr1)); addr1++;
|
---|
2380 | outb(VGAREG_GRDC_ADDRESS, read_byte(ES, addr1)); addr1++;
|
---|
2381 | addr1++;
|
---|
2382 | outb(crtc_addr - 0x4 + 0xa, read_byte(ES, addr1)); addr1++;
|
---|
2383 | }
|
---|
2384 | if (CX & 2) {
|
---|
2385 | write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE, read_byte(ES, BX)); BX++;
|
---|
2386 | write_word(BIOSMEM_SEG,BIOSMEM_NB_COLS, read_word(ES, BX)); BX += 2;
|
---|
2387 | write_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE, read_word(ES, BX)); BX += 2;
|
---|
2388 | write_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS, read_word(ES, BX)); BX += 2;
|
---|
2389 | write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, read_byte(ES, BX)); BX++;
|
---|
2390 | write_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT, read_word(ES, BX)); BX += 2;
|
---|
2391 | write_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL, read_byte(ES, BX)); BX++;
|
---|
2392 | write_byte(BIOSMEM_SEG,BIOSMEM_SWITCHES, read_byte(ES, BX)); BX++;
|
---|
2393 | write_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL, read_byte(ES, BX)); BX++;
|
---|
2394 | write_word(BIOSMEM_SEG,BIOSMEM_CURSOR_TYPE, read_word(ES, BX)); BX += 2;
|
---|
2395 | for(i=0;i<8;i++) {
|
---|
2396 | write_word(BIOSMEM_SEG, BIOSMEM_CURSOR_POS+2*i, read_word(ES, BX));
|
---|
2397 | BX += 2;
|
---|
2398 | }
|
---|
2399 | write_word(BIOSMEM_SEG,BIOSMEM_CURRENT_START, read_word(ES, BX)); BX += 2;
|
---|
2400 | write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE, read_byte(ES, BX)); BX++;
|
---|
2401 | /* current font */
|
---|
2402 | write_word(0, 0x1f * 4, read_word(ES, BX)); BX += 2;
|
---|
2403 | write_word(0, 0x1f * 4 + 2, read_word(ES, BX)); BX += 2;
|
---|
2404 | write_word(0, 0x43 * 4, read_word(ES, BX)); BX += 2;
|
---|
2405 | write_word(0, 0x43 * 4 + 2, read_word(ES, BX)); BX += 2;
|
---|
2406 | }
|
---|
2407 | if (CX & 4) {
|
---|
2408 | BX++;
|
---|
2409 | v = read_byte(ES, BX); BX++;
|
---|
2410 | outb(VGAREG_PEL_MASK, read_byte(ES, BX)); BX++;
|
---|
2411 | // Set the whole dac always, from 0
|
---|
2412 | outb(VGAREG_DAC_WRITE_ADDRESS,0x00);
|
---|
2413 | for(i=0;i<256*3;i++) {
|
---|
2414 | outb(VGAREG_DAC_DATA, read_byte(ES, BX)); BX++;
|
---|
2415 | }
|
---|
2416 | BX++;
|
---|
2417 | outb(VGAREG_DAC_WRITE_ADDRESS, v);
|
---|
2418 | }
|
---|
2419 | return BX;
|
---|
2420 | }
|
---|
2421 |
|
---|
2422 | // ============================================================================================
|
---|
2423 | //
|
---|
2424 | // Video Utils
|
---|
2425 | //
|
---|
2426 | // ============================================================================================
|
---|
2427 |
|
---|
2428 | // --------------------------------------------------------------------------------------------
|
---|
2429 | static uint8_t find_vga_entry(uint8_t mode)
|
---|
2430 | {
|
---|
2431 | uint8_t i,line=0xFF;
|
---|
2432 | for(i=0;i<=MODE_MAX;i++)
|
---|
2433 | if(vga_modes[i].svgamode==mode)
|
---|
2434 | {line=i;
|
---|
2435 | break;
|
---|
2436 | }
|
---|
2437 | return line;
|
---|
2438 | }
|
---|
2439 |
|
---|
2440 | /* =========================================================== */
|
---|
2441 | /*
|
---|
2442 | * Misc Utils
|
---|
2443 | */
|
---|
2444 | /* =========================================================== */
|
---|
2445 |
|
---|
2446 | /* This function is used for planar VGA memory reads to defeat the
|
---|
2447 | * optimizer. We must read exactly one byte, otherwise the screen
|
---|
2448 | * may be corrupted.
|
---|
2449 | */
|
---|
2450 | uint8_t readx_byte(uint16_t seg, uint16_t offset)
|
---|
2451 | {
|
---|
2452 | return( *(seg:>(uint8_t *)offset) );
|
---|
2453 | }
|
---|
2454 |
|
---|
2455 | #ifdef VGA_DEBUG
|
---|
2456 | void __cdecl unimplemented()
|
---|
2457 | {
|
---|
2458 | printf("--> Unimplemented\n");
|
---|
2459 | }
|
---|
2460 |
|
---|
2461 | void __cdecl unknown()
|
---|
2462 | {
|
---|
2463 | printf("--> Unknown int10\n");
|
---|
2464 | }
|
---|
2465 |
|
---|
2466 | #undef VBE_PRINTF_PORT
|
---|
2467 | #define VBE_PRINTF_PORT 0x504
|
---|
2468 |
|
---|
2469 | // --------------------------------------------------------------------------------------------
|
---|
2470 | void __cdecl printf(char *s, ...)
|
---|
2471 | {
|
---|
2472 | char c;
|
---|
2473 | Boolean in_format;
|
---|
2474 | unsigned format_width, i;
|
---|
2475 | uint16_t arg, digit, nibble;
|
---|
2476 | uint16_t STACK_BASED *arg_ptr;
|
---|
2477 |
|
---|
2478 | arg_ptr = (uint16_t STACK_BASED *)&s;
|
---|
2479 |
|
---|
2480 | in_format = 0;
|
---|
2481 | format_width = 0;
|
---|
2482 |
|
---|
2483 | while (c = *s) {
|
---|
2484 | if (c == '%') {
|
---|
2485 | in_format = 1;
|
---|
2486 | format_width = 0;
|
---|
2487 | } else if (in_format) {
|
---|
2488 | if ((c >= '0') && (c <= '9')) {
|
---|
2489 | format_width = (format_width * 10) + (c - '0');
|
---|
2490 | } else if (c == 'x') {
|
---|
2491 | arg_ptr++; // increment to next arg
|
---|
2492 | arg = *arg_ptr;
|
---|
2493 | if (format_width == 0)
|
---|
2494 | format_width = 4;
|
---|
2495 | i = 0;
|
---|
2496 | digit = format_width - 1;
|
---|
2497 | for (i = 0; i < format_width; i++) {
|
---|
2498 | nibble = (arg >> (4 * digit)) & 0x000f;
|
---|
2499 | if (nibble <= 9)
|
---|
2500 | outb(VBE_PRINTF_PORT, nibble + '0');
|
---|
2501 | else
|
---|
2502 | outb(VBE_PRINTF_PORT, (nibble - 10) + 'A');
|
---|
2503 | digit--;
|
---|
2504 | }
|
---|
2505 | in_format = 0;
|
---|
2506 | }
|
---|
2507 | //else if (c == 'd') {
|
---|
2508 | // in_format = 0;
|
---|
2509 | // }
|
---|
2510 | } else {
|
---|
2511 | outb(VBE_PRINTF_PORT, c);
|
---|
2512 | }
|
---|
2513 | ++s;
|
---|
2514 | }
|
---|
2515 | }
|
---|
2516 | #endif
|
---|
2517 |
|
---|
2518 | /// @todo rearrange, call only from VBE module?
|
---|
2519 | extern void vbe_biosfn_return_controller_information(uint16_t STACK_BASED *AX, uint16_t ES, uint16_t DI);
|
---|
2520 | extern void vbe_biosfn_return_mode_information(uint16_t STACK_BASED *AX, uint16_t CX, uint16_t ES, uint16_t DI);
|
---|
2521 | extern void vbe_biosfn_set_mode(uint16_t STACK_BASED *AX, uint16_t BX, uint16_t ES, uint16_t DI);
|
---|
2522 | extern void vbe_biosfn_save_restore_state(uint16_t STACK_BASED *AX, uint16_t CX, uint16_t DX, uint16_t ES, uint16_t STACK_BASED *BX);
|
---|
2523 | extern void vbe_biosfn_get_set_scanline_length(uint16_t STACK_BASED *AX, uint16_t STACK_BASED *BX, uint16_t STACK_BASED *CX, uint16_t STACK_BASED *DX);
|
---|
2524 | extern void private_biosfn_custom_mode(uint16_t STACK_BASED *AX, uint16_t STACK_BASED *BX, uint16_t STACK_BASED *CX, uint16_t STACK_BASED *DX);
|
---|
2525 |
|
---|
2526 |
|
---|
2527 | // --------------------------------------------------------------------------------------------
|
---|
2528 | /*
|
---|
2529 | * int10 main dispatcher
|
---|
2530 | */
|
---|
2531 | void __cdecl int10_func(uint16_t DI, uint16_t SI, uint16_t BP, uint16_t SP, uint16_t BX,
|
---|
2532 | uint16_t DX, uint16_t CX, uint16_t AX, uint16_t DS, uint16_t ES, uint16_t FLAGS)
|
---|
2533 | {
|
---|
2534 |
|
---|
2535 | // BIOS functions
|
---|
2536 | switch(GET_AH())
|
---|
2537 | {
|
---|
2538 | case 0x00:
|
---|
2539 | biosfn_set_video_mode(GET_AL());
|
---|
2540 | switch(GET_AL()&0x7F)
|
---|
2541 | {case 6:
|
---|
2542 | SET_AL(0x3F);
|
---|
2543 | break;
|
---|
2544 | case 0:
|
---|
2545 | case 1:
|
---|
2546 | case 2:
|
---|
2547 | case 3:
|
---|
2548 | case 4:
|
---|
2549 | case 5:
|
---|
2550 | case 7:
|
---|
2551 | SET_AL(0x30);
|
---|
2552 | break;
|
---|
2553 | default:
|
---|
2554 | SET_AL(0x20);
|
---|
2555 | }
|
---|
2556 | break;
|
---|
2557 | case 0x01:
|
---|
2558 | biosfn_set_cursor_shape(GET_CH(),GET_CL());
|
---|
2559 | break;
|
---|
2560 | case 0x02:
|
---|
2561 | biosfn_set_cursor_pos(GET_BH(),DX);
|
---|
2562 | break;
|
---|
2563 | case 0x03:
|
---|
2564 | vga_get_cursor_pos(GET_BH(), &CX, &DX);
|
---|
2565 | break;
|
---|
2566 | case 0x04:
|
---|
2567 | // Read light pen pos (unimplemented)
|
---|
2568 | #ifdef VGA_DEBUG
|
---|
2569 | unimplemented();
|
---|
2570 | #endif
|
---|
2571 | AX=0x00;
|
---|
2572 | BX=0x00;
|
---|
2573 | CX=0x00;
|
---|
2574 | DX=0x00;
|
---|
2575 | break;
|
---|
2576 | case 0x05:
|
---|
2577 | biosfn_set_active_page(GET_AL());
|
---|
2578 | break;
|
---|
2579 | case 0x06:
|
---|
2580 | biosfn_scroll(GET_AL(),GET_BH(),GET_CH(),GET_CL(),GET_DH(),GET_DL(),0xFF,SCROLL_UP);
|
---|
2581 | break;
|
---|
2582 | case 0x07:
|
---|
2583 | biosfn_scroll(GET_AL(),GET_BH(),GET_CH(),GET_CL(),GET_DH(),GET_DL(),0xFF,SCROLL_DOWN);
|
---|
2584 | break;
|
---|
2585 | case 0x08:
|
---|
2586 | vga_read_char_attr(GET_BH(), &AX);
|
---|
2587 | break;
|
---|
2588 | case 0x09:
|
---|
2589 | biosfn_write_char_attr(GET_AL(),GET_BH(),GET_BL(),CX);
|
---|
2590 | break;
|
---|
2591 | case 0x0A:
|
---|
2592 | biosfn_write_char_only(GET_AL(),GET_BH(),GET_BL(),CX);
|
---|
2593 | break;
|
---|
2594 | case 0x0C:
|
---|
2595 | biosfn_write_pixel(GET_BH(),GET_AL(),CX,DX);
|
---|
2596 | break;
|
---|
2597 | case 0x0D:
|
---|
2598 | vga_read_pixel(GET_BH(), CX, DX, &AX);
|
---|
2599 | break;
|
---|
2600 | case 0x0E:
|
---|
2601 | // Ralf Brown Interrupt list is WRONG on bh(page)
|
---|
2602 | // We do output only on the current page !
|
---|
2603 | #ifdef VGA_DEBUG
|
---|
2604 | printf("write_teletype %02x\n", GET_AL());
|
---|
2605 | #endif
|
---|
2606 |
|
---|
2607 | biosfn_write_teletype(GET_AL(),0xff,GET_BL(),NO_ATTR);
|
---|
2608 | break;
|
---|
2609 | case 0x10:
|
---|
2610 | // All other functions of group AH=0x10 rewritten in assembler
|
---|
2611 | biosfn_perform_gray_scale_summing(BX,CX);
|
---|
2612 | break;
|
---|
2613 | case 0x11:
|
---|
2614 | switch(GET_AL())
|
---|
2615 | {
|
---|
2616 | case 0x00:
|
---|
2617 | case 0x10:
|
---|
2618 | biosfn_load_text_user_pat(GET_AL(),ES,BP,CX,DX,GET_BL(),GET_BH());
|
---|
2619 | break;
|
---|
2620 | case 0x01:
|
---|
2621 | case 0x11:
|
---|
2622 | biosfn_load_text_user_pat(GET_AL(), 0xC000, (uint16_t)vgafont14, 256, 0, GET_BL(), 14);
|
---|
2623 | break;
|
---|
2624 | case 0x02:
|
---|
2625 | case 0x12:
|
---|
2626 | biosfn_load_text_user_pat(GET_AL(), 0xC000, (uint16_t)vgafont8, 256, 0, GET_BL(), 8);
|
---|
2627 | break;
|
---|
2628 | case 0x03:
|
---|
2629 | biosfn_set_font_block(GET_BL());
|
---|
2630 | break;
|
---|
2631 | case 0x04:
|
---|
2632 | case 0x14:
|
---|
2633 | biosfn_load_text_user_pat(GET_AL(), 0xC000, (uint16_t)vgafont16, 256, 0, GET_BL(), 16);
|
---|
2634 | break;
|
---|
2635 | case 0x20:
|
---|
2636 | biosfn_load_gfx_8_8_chars(ES,BP);
|
---|
2637 | break;
|
---|
2638 | case 0x21:
|
---|
2639 | biosfn_load_gfx_user_chars(ES,BP,CX,GET_BL(),GET_DL());
|
---|
2640 | break;
|
---|
2641 | case 0x22:
|
---|
2642 | biosfn_load_gfx_8_14_chars(GET_BL(),GET_DL());
|
---|
2643 | break;
|
---|
2644 | case 0x23:
|
---|
2645 | biosfn_load_gfx_8_8_dd_chars(GET_BL(),GET_DL());
|
---|
2646 | break;
|
---|
2647 | case 0x24:
|
---|
2648 | biosfn_load_gfx_8_16_chars(GET_BL(),GET_DL());
|
---|
2649 | break;
|
---|
2650 | case 0x30:
|
---|
2651 | vga_get_font_info(GET_BH(), &ES, &BP, &CX, &DX);
|
---|
2652 | break;
|
---|
2653 | #ifdef VGA_DEBUG
|
---|
2654 | default:
|
---|
2655 | unknown();
|
---|
2656 | #endif
|
---|
2657 | }
|
---|
2658 |
|
---|
2659 | break;
|
---|
2660 | case 0x12:
|
---|
2661 | switch(GET_BL())
|
---|
2662 | {
|
---|
2663 | case 0x20:
|
---|
2664 | biosfn_alternate_prtsc();
|
---|
2665 | break;
|
---|
2666 | case 0x30:
|
---|
2667 | if (GET_AL() <= 2) {
|
---|
2668 | biosfn_set_txt_lines(GET_AL());
|
---|
2669 | SET_AL(0x12);
|
---|
2670 | }
|
---|
2671 | break;
|
---|
2672 | case 0x34: /* CGA text cursor emulation control. */
|
---|
2673 | if (GET_AL() < 2) {
|
---|
2674 | write_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL,
|
---|
2675 | (read_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL) & ~1) | GET_AL());
|
---|
2676 | SET_AL(0x12);
|
---|
2677 | }
|
---|
2678 | else
|
---|
2679 | SET_AL(0); /* Invalid argument. */
|
---|
2680 | break;
|
---|
2681 | case 0x35:
|
---|
2682 | biosfn_switch_video_interface(GET_AL(),ES,DX);
|
---|
2683 | SET_AL(0x12);
|
---|
2684 | break;
|
---|
2685 | case 0x36:
|
---|
2686 | biosfn_enable_video_refresh_control(GET_AL());
|
---|
2687 | SET_AL(0x12);
|
---|
2688 | break;
|
---|
2689 | #ifdef VGA_DEBUG
|
---|
2690 | default:
|
---|
2691 | unknown();
|
---|
2692 | #endif
|
---|
2693 | }
|
---|
2694 | break;
|
---|
2695 | case 0x13:
|
---|
2696 | biosfn_write_string(GET_AL(),GET_BH(),GET_BL(),CX,GET_DH(),GET_DL(),ES,BP);
|
---|
2697 | break;
|
---|
2698 | case 0x1B:
|
---|
2699 | biosfn_read_state_info(BX,ES,DI);
|
---|
2700 | SET_AL(0x1B);
|
---|
2701 | break;
|
---|
2702 | case 0x1C:
|
---|
2703 | switch(GET_AL())
|
---|
2704 | {
|
---|
2705 | case 0x00:
|
---|
2706 | vga_get_video_state_size(CX,&BX);
|
---|
2707 | break;
|
---|
2708 | case 0x01:
|
---|
2709 | biosfn_save_video_state(CX,ES,BX);
|
---|
2710 | break;
|
---|
2711 | case 0x02:
|
---|
2712 | biosfn_restore_video_state(CX,ES,BX);
|
---|
2713 | break;
|
---|
2714 | #ifdef VGA_DEBUG
|
---|
2715 | default:
|
---|
2716 | unknown();
|
---|
2717 | #endif
|
---|
2718 | }
|
---|
2719 | SET_AL(0x1C);
|
---|
2720 | break;
|
---|
2721 |
|
---|
2722 | #ifdef VBE
|
---|
2723 | case 0x4f:
|
---|
2724 | if (vbe_has_vbe_display()) {
|
---|
2725 | switch(GET_AL())
|
---|
2726 | {
|
---|
2727 | case 0x00:
|
---|
2728 | vbe_biosfn_return_controller_information(&AX,ES,DI);
|
---|
2729 | break;
|
---|
2730 | case 0x01:
|
---|
2731 | vbe_biosfn_return_mode_information(&AX,CX,ES,DI);
|
---|
2732 | break;
|
---|
2733 | case 0x02:
|
---|
2734 | vbe_biosfn_set_mode(&AX,BX,ES,DI);
|
---|
2735 | break;
|
---|
2736 | case 0x04:
|
---|
2737 | vbe_biosfn_save_restore_state(&AX, CX, DX, ES, &BX);
|
---|
2738 | break;
|
---|
2739 | case 0x06:
|
---|
2740 | vbe_biosfn_get_set_scanline_length(&AX, &BX, &CX, &DX);
|
---|
2741 | break;
|
---|
2742 | case 0x09:
|
---|
2743 | //FIXME
|
---|
2744 | #ifdef VGA_DEBUG
|
---|
2745 | unimplemented();
|
---|
2746 | #endif
|
---|
2747 | // function failed
|
---|
2748 | AX=0x100;
|
---|
2749 | break;
|
---|
2750 | case 0x0A:
|
---|
2751 | //FIXME
|
---|
2752 | #ifdef VGA_DEBUG
|
---|
2753 | unimplemented();
|
---|
2754 | #endif
|
---|
2755 | // function failed
|
---|
2756 | AX=0x100;
|
---|
2757 | break;
|
---|
2758 | default:
|
---|
2759 | #ifdef VGA_DEBUG
|
---|
2760 | unknown();
|
---|
2761 | #endif
|
---|
2762 | // function failed
|
---|
2763 | AX=0x100;
|
---|
2764 | }
|
---|
2765 | }
|
---|
2766 | else {
|
---|
2767 | // No VBE display
|
---|
2768 | AX=0x0100;
|
---|
2769 | }
|
---|
2770 | break;
|
---|
2771 | case 0x56:
|
---|
2772 | if (vbe_has_vbe_display()) {
|
---|
2773 | switch(GET_AL())
|
---|
2774 | {
|
---|
2775 | case 0x42:
|
---|
2776 | private_biosfn_custom_mode(&AX,&BX,&CX,&DX);
|
---|
2777 | break;
|
---|
2778 | default:
|
---|
2779 | AX=0x0100;
|
---|
2780 | break;
|
---|
2781 | }
|
---|
2782 | } else {
|
---|
2783 | // No VBE display
|
---|
2784 | AX=0x0100;
|
---|
2785 | }
|
---|
2786 | break;
|
---|
2787 | #endif
|
---|
2788 |
|
---|
2789 | #ifdef VGA_DEBUG
|
---|
2790 | default:
|
---|
2791 | unknown();
|
---|
2792 | #endif
|
---|
2793 | }
|
---|
2794 | }
|
---|
2795 |
|
---|
2796 | #ifdef VBE
|
---|
2797 | //#include "vbe.c"
|
---|
2798 | #endif
|
---|
2799 |
|
---|
2800 | #ifdef CIRRUS
|
---|
2801 | #include "clext.c"
|
---|
2802 | #endif
|
---|
2803 |
|
---|
2804 | // --------------------------------------------------------------------------------------------
|
---|
2805 |
|
---|