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annotate src/video/nds/SDL_ndsvideo.c @ 2690:ca01c20274c0 gsoc2008_nds

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More work and some bugfixes on the graphics driver.
author Darren Alton <dalton@stevens.edu>
date Sat, 16 Aug 2008 07:44:35 +0000
parents 71c56e900f8b
children c04a266c277a
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* SDL Nintendo DS video driver implementation
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25 * based on dummy driver:
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26 * Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion
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27 * of this was cut-and-pasted from Stephane Peter's work in the AAlib
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28 * SDL video driver. Renamed to "DUMMY" by Sam Lantinga.
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29 */
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30
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31 #include <stdio.h>
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32 #include <stdlib.h>
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33 #include <nds.h>
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34 #include <nds/arm9/video.h>
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35
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36 #include "SDL_video.h"
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37 #include "SDL_mouse.h"
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38 #include "../SDL_sysvideo.h"
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39 #include "../SDL_pixels_c.h"
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40 #include "../../events/SDL_events_c.h"
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41
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42 #include "SDL_ndsvideo.h"
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43 #include "SDL_ndsevents_c.h"
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44 #include "SDL_ndsrender_c.h"
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45
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46
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47
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48 #define TRACE
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49 //#define TRACE printf
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50
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51
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52
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53 #define NDSVID_DRIVER_NAME "nds"
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54
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55 /* Initialization/Query functions */
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56 static int NDS_VideoInit(_THIS);
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57 static int NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode);
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58 static void NDS_VideoQuit(_THIS);
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59
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60
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61 /* SDL NDS driver bootstrap functions */
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62 static int
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63 NDS_Available(void)
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64 {
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65 /*const char *envr = SDL_getenv("SDL_VIDEODRIVER");*/
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66 /*printf("NDS_Available()\n"); */
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67 return (1);
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68 }
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69
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70 static void
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71 NDS_DeleteDevice(SDL_VideoDevice * device)
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72 {
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73 SDL_free(device);
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74 }
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75
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76 static SDL_VideoDevice *
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77 NDS_CreateDevice(int devindex)
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78 {
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79 SDL_VideoDevice *device;
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80 /*printf("NDS_CreateDevice(%d)\n", devindex); */
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81
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82 TRACE("+NDS_CreateDevice\n");
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83 /* Initialize all variables that we clean on shutdown */
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84 device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
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85 if (!device) {
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86 SDL_OutOfMemory();
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87 if (device) {
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88 SDL_free(device);
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89 }
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90 return (0);
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91 }
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92
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93 /* Set the function pointers */
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94 device->VideoInit = NDS_VideoInit;
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95 device->VideoQuit = NDS_VideoQuit;
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96 device->SetDisplayMode = NDS_SetDisplayMode;
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97 device->PumpEvents = NDS_PumpEvents;
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98
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99 device->num_displays = 2; /* DS = dual screens */
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100
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101 device->free = NDS_DeleteDevice;
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102
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103 TRACE("-NDS_CreateDevice\n");
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104 return device;
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105 }
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106
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107 VideoBootStrap NDS_bootstrap = {
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108 NDSVID_DRIVER_NAME, "SDL NDS video driver",
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109 NDS_Available, NDS_CreateDevice
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110 };
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111
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112 int
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113 NDS_VideoInit(_THIS)
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114 {
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115 SDL_DisplayMode mode;
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116 int i;
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117
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118 TRACE("+NDS_VideoInit\n");
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119 /* simple 256x192x16x60 for now */
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120 mode.w = 256;
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121 mode.h = 192;
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122 mode.format = SDL_PIXELFORMAT_ABGR1555;
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123 mode.refresh_rate = 60;
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124 mode.driverdata = NULL;
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125
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126 SDL_AddBasicVideoDisplay(&mode);
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127 SDL_AddRenderDriver(0, &NDS_RenderDriver);
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128 /*SDL_AddBasicVideoDisplay(&mode); two screens, same mode. uncomment later
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129 SDL_AddRenderDriver(1, &NDS_RenderDriver);*/
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130
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131 SDL_zero(mode);
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132 SDL_AddDisplayMode(0, &mode);
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133
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134 /* hackish stuff to get things up and running for now, and for a console */
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135 powerON(POWER_ALL_2D);
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136 irqInit();
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137 irqEnable(IRQ_VBLANK);
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138 NDS_SetDisplayMode(_this, &mode);
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139
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140 TRACE("-NDS_VideoInit\n");
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141 return 0;
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142 }
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143
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144 static int
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145 NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
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146 {
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147 TRACE("+NDS_SetDisplayMode\n");
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148 /* right now this function is just hard-coded for 256x192 ABGR1555 */
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149 videoSetMode(MODE_5_2D |
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150 DISPLAY_BG2_ACTIVE |
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151 DISPLAY_BG3_ACTIVE |
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152 DISPLAY_BG_EXT_PALETTE |
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153 DISPLAY_SPR_1D_LAYOUT |
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154 DISPLAY_SPR_ACTIVE |
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155 DISPLAY_SPR_EXT_PALETTE); /* display on main core
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156 with lots of flags set for
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157 flexibility/capacity to render */
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158
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159 /* hopefully these cover all the various things we might need to do */
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160 vramSetBankA(VRAM_A_MAIN_BG_0x06000000);
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161 vramSetBankB(VRAM_B_MAIN_BG_0x06020000);
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162 vramSetBankC(VRAM_C_SUB_BG_0x06200000);
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163 vramSetBankD(VRAM_D_MAIN_BG_0x06040000); /* not a typo. vram d can't sub */
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164 vramSetBankE(VRAM_E_MAIN_SPRITE);
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165 vramSetBankF(VRAM_F_OBJ_EXT_PALETTE);
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166 vramSetBankG(VRAM_G_BG_EXT_PALETTE);
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167 vramSetBankH(VRAM_H_SUB_BG_EXT_PALETTE);
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168 vramSetBankI(VRAM_I_SUB_SPRITE);
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169
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170 videoSetModeSub(MODE_0_2D | DISPLAY_BG0_ACTIVE); /* debug text on sub
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171 TODO: this will change
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172 when multi-head is
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173 introduced in render */
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174
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175 TRACE("-NDS_SetDisplayMode\n");
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176 return 0;
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177 }
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178
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179 void
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180 NDS_VideoQuit(_THIS)
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181 {
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182 TRACE("+NDS_VideoQuit\n");
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183 videoSetMode(DISPLAY_SCREEN_OFF);
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184 videoSetModeSub(DISPLAY_SCREEN_OFF);
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185 vramSetMainBanks(VRAM_A_LCD, VRAM_B_LCD, VRAM_C_LCD, VRAM_D_LCD);
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186 vramSetBankE(VRAM_E_LCD);
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187 vramSetBankF(VRAM_F_LCD);
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188 vramSetBankG(VRAM_G_LCD);
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189 vramSetBankH(VRAM_H_LCD);
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190 vramSetBankI(VRAM_I_LCD);
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191 TRACE("-NDS_VideoQuit\n");
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192 }
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193