2 * All this is mostly based on rlyeh's minimal library.
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3 * Copied here to review all his code and understand what's going on.
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8 GP2X minimal library v0.A by rlyeh, (c) 2005. emulnation.info@rlyeh (swap it!)
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10 Thanks to Squidge, Robster, snaff, Reesy and NK, for the help & previous work! :-)
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15 Free for non-commercial projects (it would be nice receiving a mail from you).
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16 Other cases, ask me first.
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18 GamePark Holdings is not allowed to use this library and/or use parts from it.
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28 #include <sys/mman.h>
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29 #include <sys/types.h>
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30 #include <sys/stat.h>
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35 #include "../linux/sndout_oss.h"
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36 #include "../common/arm_utils.h"
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37 #include "../common/arm_linux.h"
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38 #include "../common/emu.h"
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40 volatile unsigned short *gp2x_memregs;
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42 volatile unsigned long *gp2x_memregl;
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43 static void *gp2x_screens[4];
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44 static int screensel = 0;
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47 static int touchdev = -1;
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48 static int touchcal[7] = { 6203, 0, -1501397, 0, -4200, 16132680, 65536 };
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50 #define FRAMEBUFF_WHOLESIZE (0x30000*4) // 320*240*2 + some more
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51 #define FRAMEBUFF_ADDR0 (0x4000000-FRAMEBUFF_WHOLESIZE)
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52 #define FRAMEBUFF_ADDR1 (FRAMEBUFF_ADDR0+0x30000)
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53 #define FRAMEBUFF_ADDR2 (FRAMEBUFF_ADDR1+0x30000)
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54 #define FRAMEBUFF_ADDR3 (FRAMEBUFF_ADDR2+0x30000)
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56 static const int gp2x_screenaddrs[4] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };
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57 static int gp2x_screenaddrs_use[4];
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58 static unsigned short gp2x_screenaddr_old[4];
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62 void gp2x_video_flip(void)
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64 unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3];
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65 unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16);
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67 gp2x_memregs[0x2910>>1] = msw;
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68 gp2x_memregs[0x2914>>1] = msw;
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69 gp2x_memregs[0x290E>>1] = lsw;
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70 gp2x_memregs[0x2912>>1] = lsw;
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72 // jump to other buffer:
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73 g_screen_ptr = gp2x_screens[++screensel&3];
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76 /* doulblebuffered flip */
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77 void gp2x_video_flip2(void)
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79 unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16);
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81 gp2x_memregs[0x2910>>1] = msw;
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82 gp2x_memregs[0x2914>>1] = msw;
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83 gp2x_memregs[0x290E>>1] = 0;
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84 gp2x_memregs[0x2912>>1] = 0;
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86 // jump to other buffer:
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87 g_screen_ptr = gp2x_screens[++screensel&1];
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91 void gp2x_video_changemode2(int bpp)
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93 gp2x_memregs[0x28DA>>1]=(((bpp+1)/8)<<9)|0xAB; /*8/15/16/24bpp...*/
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94 gp2x_memregs[0x290C>>1]=320*((bpp+1)/8); /*line width in bytes*/
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98 void gp2x_video_changemode(int bpp)
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100 gp2x_video_changemode2(bpp);
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102 gp2x_memset_all_buffers(0, 0, 320*240*2);
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107 void gp2x_video_setpalette(int *pal, int len)
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109 unsigned short *g=(unsigned short *)pal;
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110 volatile unsigned short *memreg = &gp2x_memregs[0x295A>>1];
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111 gp2x_memregs[0x2958>>1] = 0;
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114 while(len--) *memreg=*g++;
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118 // TV Compatible function //
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119 void gp2x_video_RGB_setscaling(int ln_offs, int W, int H)
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121 float escalaw, escalah;
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122 int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;
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123 unsigned short scalw;
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126 gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp;
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127 gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp;
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128 gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp;
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129 gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp;
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131 escalaw = 1024.0; // RGB Horiz LCD
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132 escalah = 320.0; // RGB Vert LCD
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134 if(gp2x_memregs[0x2800>>1]&0x100) //TV-Out
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136 escalaw=489.0; // RGB Horiz TV (PAL, NTSC)
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137 if (gp2x_memregs[0x2818>>1] == 287) //PAL
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138 escalah=274.0; // RGB Vert TV PAL
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139 else if (gp2x_memregs[0x2818>>1] == 239) //NTSC
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140 escalah=331.0; // RGB Vert TV NTSC
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143 // scale horizontal
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144 scalw = (unsigned short)((float)escalaw *(W/320.0));
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145 /* if there is no horizontal scaling, vertical doesn't work. Here is a nasty wrokaround... */
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146 if (H != 240 && W == 320) scalw--;
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147 gp2x_memregs[0x2906>>1]=scalw;
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149 gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah *bpp *(H/240.0));
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153 void gp2x_video_wait_vsync(void)
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155 unsigned short v = gp2x_memregs[0x1182>>1];
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156 while (!((v ^ gp2x_memregs[0x1182>>1]) & 0x10)) spend_cycles(1024);
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160 void gp2x_video_flush_cache(void)
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162 // since we are using the mmu hack, we must flush the cache first
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163 cache_flush_d_inval_i(g_screen_ptr, (char *)g_screen_ptr + 320*240*2);
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167 void gp2x_memcpy_buffers(int buffers, void *data, int offset, int len)
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170 if (buffers & (1<<0)) { dst = (char *)gp2x_screens[0] + offset; if (dst != data) memcpy(dst, data, len); }
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171 if (buffers & (1<<1)) { dst = (char *)gp2x_screens[1] + offset; if (dst != data) memcpy(dst, data, len); }
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172 if (buffers & (1<<2)) { dst = (char *)gp2x_screens[2] + offset; if (dst != data) memcpy(dst, data, len); }
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173 if (buffers & (1<<3)) { dst = (char *)gp2x_screens[3] + offset; if (dst != data) memcpy(dst, data, len); }
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177 void gp2x_memcpy_all_buffers(void *data, int offset, int len)
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179 gp2x_memcpy_buffers(0xf, data, offset, len);
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183 void gp2x_memset_all_buffers(int offset, int byte, int len)
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185 memset((char *)gp2x_screens[0] + offset, byte, len);
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186 memset((char *)gp2x_screens[1] + offset, byte, len);
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187 memset((char *)gp2x_screens[2] + offset, byte, len);
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188 memset((char *)gp2x_screens[3] + offset, byte, len);
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192 void gp2x_pd_clone_buffer2(void)
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194 memcpy(g_screen_ptr, gp2x_screens[2], 320*240*2);
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198 unsigned long gp2x_joystick_read(int unused)
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200 unsigned long value=(gp2x_memregs[0x1198>>1] & 0x00FF); // GPIO M
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201 if(value==0xFD) value=0xFA;
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202 if(value==0xF7) value=0xEB;
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203 if(value==0xDF) value=0xAF;
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204 if(value==0x7F) value=0xBE;
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205 value = ~((gp2x_memregs[0x1184>>1] & 0xFF00) | value | (gp2x_memregs[0x1186>>1] << 16)); // C D
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210 typedef struct ucb1x00_ts_event
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212 unsigned short pressure;
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215 unsigned short pad;
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216 struct timeval stamp;
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217 } UCB1X00_TS_EVENT;
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219 int gp2x_touchpad_read(int *x, int *y)
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221 UCB1X00_TS_EVENT event;
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222 static int zero_seen = 0;
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225 if (touchdev < 0) return -1;
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227 retval = read(touchdev, &event, sizeof(event));
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229 printf("touch read failed %i %i\n", retval, errno);
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232 // this is to ignore the messed-up 4.1.x driver
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233 if (event.pressure == 0) zero_seen = 1;
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235 if (x) *x = (event.x * touchcal[0] + touchcal[2]) >> 16;
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236 if (y) *y = (event.y * touchcal[4] + touchcal[5]) >> 16;
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237 // printf("read %i %i %i\n", event.pressure, *x, *y);
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239 return zero_seen ? event.pressure : 0;
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244 void Pause940(int yes)
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247 gp2x_memregs[0x0904>>1] &= 0xFFFE;
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249 gp2x_memregs[0x0904>>1] |= 1;
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253 void Reset940(int yes, int bank)
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255 gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) | (bank & 0x03);
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258 static void proc_set(const char *path, const char *val)
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263 f = fopen(path, "w");
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265 printf("failed to open: %s\n", path);
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272 printf("\"%s\" is set to: ", path);
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273 f = fopen(path, "r");
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275 printf("(open failed)\n");
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279 fgets(tmp, sizeof(tmp), f);
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286 void gp2x_init(void)
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288 printf("entering init()\n"); fflush(stdout);
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290 memdev = open("/dev/mem", O_RDWR);
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293 perror("open(\"/dev/mem\")");
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297 gp2x_memregs = mmap(0, 0x10000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);
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298 printf("memregs are @ %p\n", gp2x_memregs);
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299 if(gp2x_memregs == MAP_FAILED)
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301 perror("mmap(memregs)");
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304 gp2x_memregl = (unsigned long *) gp2x_memregs;
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306 gp2x_memregs[0x2880>>1] &= ~0x383; // disable cursor, subpict, osd, video layers
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308 gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED, memdev, FRAMEBUFF_ADDR0);
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309 if(gp2x_screens[0] == MAP_FAILED)
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311 perror("mmap(g_screen_ptr)");
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314 printf("framebuffers point to %p\n", gp2x_screens[0]);
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315 gp2x_screens[1] = (char *) gp2x_screens[0]+0x30000;
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316 gp2x_screens[2] = (char *) gp2x_screens[1]+0x30000;
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317 gp2x_screens[3] = (char *) gp2x_screens[2]+0x30000;
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319 g_screen_ptr = gp2x_screens[0];
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322 gp2x_screenaddr_old[0] = gp2x_memregs[0x290E>>1];
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323 gp2x_screenaddr_old[1] = gp2x_memregs[0x2910>>1];
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324 gp2x_screenaddr_old[2] = gp2x_memregs[0x2912>>1];
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325 gp2x_screenaddr_old[3] = gp2x_memregs[0x2914>>1];
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327 memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));
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328 gp2x_memset_all_buffers(0, 0, 320*240*2);
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334 touchdev = open("/dev/touchscreen/wm97xx", O_RDONLY);
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335 if (touchdev >= 0) {
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336 FILE *pcf = fopen("/etc/pointercal", "r");
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338 fscanf(pcf, "%d %d %d %d %d %d %d", &touchcal[0], &touchcal[1],
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339 &touchcal[2], &touchcal[3], &touchcal[4], &touchcal[5], &touchcal[6]);
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342 printf("found touchscreen/wm97xx\n");
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345 /* disable Linux read-ahead */
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346 proc_set("/proc/sys/vm/max-readahead", "0\n");
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347 proc_set("/proc/sys/vm/min-readahead", "0\n");
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349 printf("exitting init()\n"); fflush(stdout);
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352 char *ext_menu = 0, *ext_state = 0;
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354 void gp2x_deinit(void)
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359 gp2x_video_changemode(15);
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360 gp2x_memregs[0x290E>>1] = gp2x_screenaddr_old[0];
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361 gp2x_memregs[0x2910>>1] = gp2x_screenaddr_old[1];
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362 gp2x_memregs[0x2912>>1] = gp2x_screenaddr_old[2];
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363 gp2x_memregs[0x2914>>1] = gp2x_screenaddr_old[3];
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365 munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);
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366 munmap((void *)gp2x_memregs, 0x10000);
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368 if (touchdev >= 0) close(touchdev);
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372 printf("all done, running ");
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374 // Zaq121's alternative frontend support from MAME
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375 if (ext_menu && ext_state) {
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376 printf("%s -state %s\n", ext_menu, ext_state);
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377 execl(ext_menu, ext_menu, "-state", ext_state, NULL);
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378 } else if(ext_menu) {
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379 printf("%s\n", ext_menu);
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380 execl(ext_menu, ext_menu, NULL);
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382 printf("gp2xmenu\n");
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383 chdir("/usr/gp2x");
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384 execl("gp2xmenu", "gp2xmenu", NULL);
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389 void lprintf(const char *fmt, ...)
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