5 #include <sys/mman.h>
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6 #include <sys/ioctl.h>
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10 #include "code940/940shared.h"
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14 #include "asmutils.h"
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16 #include "../../Pico/PicoInt.h"
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17 #include "../../Pico/sound/mix.h"
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19 /* we will need some gp2x internals here */
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20 extern volatile unsigned short *gp2x_memregs; /* from minimal library rlyeh */
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21 extern volatile unsigned long *gp2x_memregl;
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23 static unsigned char *shared_mem = 0;
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24 static _940_data_t *shared_data = 0;
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25 _940_ctl_t *shared_ctl = 0;
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26 unsigned char *mp3_mem = 0;
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28 #define MP3_SIZE_MAX (0x1000000 - 4*640*480)
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30 int crashed_940 = 0;
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32 static FILE *loaded_mp3 = 0;
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34 /***********************************************************/
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36 #define MAXOUT (+32767)
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37 #define MINOUT (-32768)
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40 #define Limit(val, max,min) { \
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41 if ( val > max ) val = max; \
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42 else if ( val < min ) val = min; \
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45 /* these will be managed locally on our side */
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46 extern int *ym2612_dacen;
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47 extern INT32 *ym2612_dacout;
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48 extern void *ym2612_regs;
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50 static UINT8 *REGS = 0; /* we will also keep local copy of regs for savestates and such */
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51 static INT32 addr_A1; /* address line A1 */
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53 static INT32 dacout;
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54 static UINT8 ST_address; /* address register */
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55 static UINT8 ST_status; /* status flag */
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56 static UINT8 ST_mode; /* mode CSM / 3SLOT */
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57 static int ST_TA; /* timer a */
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58 static int ST_TAC; /* timer a maxval */
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59 static int ST_TAT; /* timer a ticker */
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60 static UINT8 ST_TB; /* timer b */
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61 static int ST_TBC; /* timer b maxval */
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62 static int ST_TBT; /* timer b ticker */
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64 static int writebuff_ptr = 0;
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67 /* OPN Mode Register Write */
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68 static void set_timers( int v )
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71 /* b6 = 3 slot mode */
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74 /* b3 = timer enable b */
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75 /* b2 = timer enable a */
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80 /* reset Timer b flag */
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84 /* reset Timer a flag */
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92 /* returns 1 if sample affecting state changed */
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93 int YM2612Write_940(unsigned int a, unsigned int v)
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95 int addr; //, ret=1;
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97 v &= 0xff; /* adjust to 8 bit bus */
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101 case 0: /* address port 0 */
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107 case 1: /* data port 0 */
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108 if (addr_A1 != 0) {
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109 return 0; /* verified on real YM2608 */
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115 switch( addr & 0xf0 )
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117 case 0x20: /* 0x20-0x2f Mode */
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120 case 0x24: { // timer A High 8
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121 int TAnew = (ST_TA & 0x03)|(((int)v)<<2);
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122 if(ST_TA != TAnew) {
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123 // we should reset ticker only if new value is written. Outrun requires this.
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125 ST_TAC = (1024-TAnew)*18;
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130 case 0x25: { // timer A Low 2
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131 int TAnew = (ST_TA & 0x3fc)|(v&3);
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132 if(ST_TA != TAnew) {
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134 ST_TAC = (1024-TAnew)*18;
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139 case 0x26: // timer B
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142 ST_TBC = (256-v)<<4;
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147 case 0x27: /* mode, timer control */
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149 break; // other side needs ST.mode for 3slot mode
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150 case 0x2a: /* DAC data (YM2612) */
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151 dacout = ((int)v - 0x80) << 6; /* level unknown (notaz: 8 seems to be too much) */
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153 case 0x2b: /* DAC Sel (YM2612) */
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154 /* b7 = dac enable */
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156 break; // other side has to know this
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164 case 2: /* address port 1 */
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170 case 3: /* data port 1 */
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171 if (addr_A1 != 1) {
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172 return 0; /* verified on real YM2608 */
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175 addr = ST_address | 0x100;
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180 if(currentConfig.EmuOpt & 4) {
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181 /* queue this write for 940 */
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182 if (writebuff_ptr < 2047) {
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183 if (shared_ctl->writebuffsel == 1) {
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184 shared_ctl->writebuff0[writebuff_ptr++] = (a<<8)|v;
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186 shared_ctl->writebuff1[writebuff_ptr++] = (a<<8)|v;
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189 printf("warning: writebuff_ptr > 2047\n");
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193 return 0; // cause the engine to do updates once per frame only
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196 UINT8 YM2612Read_940(void)
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202 int YM2612PicoTick_940(int n)
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207 if(ST_mode & 0x01 && (ST_TAT+=64*n) >= ST_TAC) {
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209 if(ST_mode & 0x04) ST_status |= 1;
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210 // CSM mode total level latch and auto key on
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212 if(ST_mode & 0x80) {
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213 CSMKeyControll( &(ym2612_940->CH[2]) ); // Vectorman2, etc.
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220 if(ST_mode & 0x02 && (ST_TBT+=64*n) >= ST_TBC) {
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222 if(ST_mode & 0x08) ST_status |= 2;
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229 #define CHECK_BUSY(job) \
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230 (gp2x_memregs[0x3b46>>1] & (1<<(job-1)))
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232 static void wait_busy_940(int job)
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237 for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)
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238 spend_cycles(8*1024); // tested to be best for mp3 dec
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239 if (i < 0x10000) return;
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242 printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);
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243 for (i = 0; i < 8; i++)
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244 printf("%i ", shared_ctl->vstarts[i]);
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246 printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",
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247 gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);
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248 printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);
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249 printf("trying to interrupt..\n");
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250 gp2x_memregs[0x3B3E>>1] = 0xffff;
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251 for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)
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252 spend_cycles(8*1024);
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253 printf("i = 0x%x\n", i);
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254 printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",
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255 gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);
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256 printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);
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258 strcpy(menuErrorMsg, "940 crashed.");
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259 engineState = PGS_Menu;
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264 static void add_job_940(int job)
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266 if (job <= 0 || job > 16) {
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267 printf("add_job_940: bad job: %i\n", job);
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271 // generate interrupt for this job
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273 gp2x_memregs[(0x3B20+job*2)>>1] = 1;
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275 // printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);
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279 void YM2612PicoStateLoad_940(void)
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281 int i, old_A1 = addr_A1;
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283 // feed all the registers and update internal state
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284 for(i = 0; i < 0x100; i++) {
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285 YM2612Write_940(0, i);
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286 YM2612Write_940(1, REGS[i]);
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288 for(i = 0; i < 0x100; i++) {
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289 YM2612Write_940(2, i);
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290 YM2612Write_940(3, REGS[i|0x100]);
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295 add_job_940(JOB940_PICOSTATELOAD);
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299 static void internal_reset(void)
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303 ST_status = 0; /* normal mode */
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312 /* this must be called after mmu hack, the allocated regions must not get cached */
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313 void sharedmem_init(void)
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315 if (shared_mem != NULL) return;
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317 shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);
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318 if(shared_mem == MAP_FAILED)
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320 printf("mmap(shared_data) failed with %i\n", errno);
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323 shared_data = (_940_data_t *) (shared_mem+0x100000);
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324 /* this area must not get buffered on either side */
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325 shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);
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326 mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x3000000);
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327 if (mp3_mem == MAP_FAILED)
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329 printf("mmap(mp3_mem) failed with %i\n", errno);
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336 void sharedmem_deinit(void)
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338 munmap(shared_mem, 0x210000);
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339 munmap(mp3_mem, MP3_SIZE_MAX);
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340 shared_mem = mp3_mem = NULL;
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341 shared_data = NULL;
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346 extern char **g_argv;
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348 /* none of the functions in this file should be called before this one */
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349 void YM2612Init_940(int baseclock, int rate)
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351 printf("YM2612Init_940()\n");
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352 printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));
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357 gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920
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358 gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940
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360 gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated
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361 gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller
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366 unsigned char ucData[1024];
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367 int nRead, i, nLen = 0;
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368 char binpath[1024];
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371 strncpy(binpath, g_argv[0], 1023);
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373 for (i = strlen(binpath); i > 0; i--)
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374 if (binpath[i] == '/') { binpath[i] = 0; break; }
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375 strcat(binpath, "/code940.bin");
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377 fp = fopen(binpath, "rb");
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380 memset(gp2x_screen, 0, 320*240);
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381 gp2x_text_out8(10, 100, "failed to open required file:");
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382 gp2x_text_out8(10, 110, "code940.bin");
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384 printf("failed to open %s\n", binpath);
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390 nRead = fread(ucData, 1, 1024, fp);
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393 memcpy(shared_mem + nLen, ucData, nRead);
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400 memset(shared_data, 0, sizeof(*shared_data));
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401 memset(shared_ctl, 0, sizeof(*shared_ctl));
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403 REGS = YM2612GetRegs();
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405 ym2612_dacen = &dacen;
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406 ym2612_dacout = &dacout;
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412 gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940
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413 gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND
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414 gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND
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416 /* start the 940 */
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420 // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT
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422 /* now cause 940 to init it's ym2612 stuff */
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423 shared_ctl->baseclock = baseclock;
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424 shared_ctl->rate = rate;
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425 add_job_940(JOB940_INITALL);
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429 void YM2612ResetChip_940(void)
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431 printf("YM2612ResetChip_940()\n");
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432 if (shared_data == NULL) {
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433 printf("YM2612ResetChip_940: reset before init?\n");
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439 add_job_940(JOB940_YM2612RESETCHIP);
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443 int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)
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445 int *ym_buf = shared_data->ym_buffer;
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448 //printf("YM2612UpdateOne_940()\n");
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450 if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);
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452 ym_active_chs = shared_ctl->ym_active_chs;
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454 // mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash
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455 if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);
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456 else memset32(buffer, 0, length<<stereo);
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458 if (shared_ctl->writebuffsel == 1) {
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459 shared_ctl->writebuff0[writebuff_ptr] = 0xffff;
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461 shared_ctl->writebuff1[writebuff_ptr] = 0xffff;
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465 /* predict sample counter for next frame */
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466 if (PsndLen_exc_add) {
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467 if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length = PsndLen + 1;
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468 else length = PsndLen;
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471 /* give 940 ym job */
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472 shared_ctl->writebuffsel ^= 1;
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473 shared_ctl->length = length;
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474 shared_ctl->stereo = stereo;
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476 add_job_940(JOB940_YM2612UPDATEONE);
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478 return ym_active_chs;
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482 static int mp3_samples_ready = 0, mp3_buffer_offs = 0;
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483 static int mp3_play_bufsel = 0, mp3_job_started = 0;
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485 void mp3_update(int *buffer, int length, int stereo)
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490 // not data track, CDC is reading, playback was started, track not ended
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491 cdda_on = !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1) &&
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492 loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;
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494 if (!cdda_on) return;
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496 if (!(PicoOpt&0x200)) {
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497 mp3_update_local(buffer, length, stereo);
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501 length_mp3 = length;
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502 if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo
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503 else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish
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505 /* do we have to wait? */
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506 if (mp3_job_started && mp3_samples_ready < length_mp3) {
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507 if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);
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508 mp3_job_started = 0;
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509 mp3_samples_ready += 1152;
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512 /* mix mp3 data, only stereo */
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513 if (mp3_samples_ready >= length_mp3)
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516 void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;
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517 if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }
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518 else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }
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520 if (1152 - mp3_buffer_offs >= length_mp3) {
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521 mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);
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523 mp3_buffer_offs += length_mp3;
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525 // collect samples from both buffers..
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526 int left = 1152 - mp3_buffer_offs;
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527 if (mp3_play_bufsel == 0)
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529 mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);
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530 mp3_buffer_offs = length_mp3 - left;
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531 mp3_play_bufsel = 1;
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533 mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);
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534 mp3_buffer_offs = length_mp3 - left;
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535 mix_samples(buffer + ((left>>shr)<<1),
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536 shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);
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537 mp3_play_bufsel = 0;
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540 mp3_samples_ready -= length_mp3;
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543 // ask to decode more if we already can
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544 if (!mp3_job_started)
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546 mp3_job_started = 1;
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547 shared_ctl->mp3_buffsel ^= 1;
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548 add_job_940(JOB940_MP3DECODE);
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553 /***********************************************************/
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555 void mp3_start_play(FILE *f, int pos) // pos is 0-1023
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559 if (!(PicoOpt&0x800)) { // cdda disabled?
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563 if (loaded_mp3 != f)
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565 // printf("loading mp3... "); fflush(stdout);
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566 fseek(f, 0, SEEK_SET);
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567 fread(mp3_mem, 1, MP3_SIZE_MAX, f);
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568 // if (feof(f)) printf("done.\n");
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569 // else printf("done. mp3 too large, not all data loaded.\n");
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570 shared_ctl->mp3_len = ftell(f);
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573 if (PicoOpt&0x200) {
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574 // as we are going to change 940's cacheable area, we must invalidate it's cache..
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575 if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);
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576 add_job_940(JOB940_INVALIDATE_DCACHE);
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582 byte_offs = (shared_ctl->mp3_len << 6) >> 10;
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586 // printf("mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);
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588 shared_ctl->mp3_offs = byte_offs;
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590 // reset buffer pointers and stuff..
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591 mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;
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592 mp3_job_started = 0;
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593 shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode
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595 if (!(PicoOpt&0x200)) mp3_start_local();
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599 int mp3_get_offset(void)
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604 cdda_on = (PicoMCD & 1) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&
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605 (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;
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608 offs1024 = shared_ctl->mp3_offs << 7;
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609 offs1024 /= shared_ctl->mp3_len;
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612 printf("offs1024=%i (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);
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