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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102 if (!addr_A1 && ST_address == v)
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103 return 0; /* address already selected, don't send this command to 940 */
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105 /* don't send DAC or timer related address changes to 940 */
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106 if (!addr_A1 && (v & 0xf0) == 0x20 &&
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107 (v == 0x24 || v == 0x25 || v == 0x26 || v == 0x2a))
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113 case 1: /* data port 0 */
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114 if (addr_A1 != 0) {
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115 return 0; /* verified on real YM2608 */
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121 switch( addr & 0xf0 )
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123 case 0x20: /* 0x20-0x2f Mode */
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126 case 0x24: { // timer A High 8
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127 int TAnew = (ST_TA & 0x03)|(((int)v)<<2);
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128 if(ST_TA != TAnew) {
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129 // we should reset ticker only if new value is written. Outrun requires this.
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131 ST_TAC = (1024-TAnew)*18;
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136 case 0x25: { // timer A Low 2
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137 int TAnew = (ST_TA & 0x3fc)|(v&3);
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138 if(ST_TA != TAnew) {
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140 ST_TAC = (1024-TAnew)*18;
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145 case 0x26: // timer B
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148 ST_TBC = (256-v)<<4;
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153 case 0x27: /* mode, timer control */
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155 break; // other side needs ST.mode for 3slot mode
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156 case 0x2a: /* DAC data (YM2612) */
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157 dacout = ((int)v - 0x80) << 6; /* level unknown (notaz: 8 seems to be too much) */
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159 case 0x2b: /* DAC Sel (YM2612) */
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160 /* b7 = dac enable */
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162 break; // other side has to know this
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170 case 2: /* address port 1 */
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171 if (addr_A1 && ST_address == v)
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178 case 3: /* data port 1 */
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179 if (addr_A1 != 1) {
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180 return 0; /* verified on real YM2608 */
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183 addr = ST_address | 0x100;
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188 if(currentConfig.EmuOpt & 4) {
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189 /* queue this write for 940 */
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190 if (writebuff_ptr < 2047) {
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191 if (shared_ctl->writebuffsel == 1) {
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192 shared_ctl->writebuff0[writebuff_ptr++] = (a<<8)|v;
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194 shared_ctl->writebuff1[writebuff_ptr++] = (a<<8)|v;
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197 printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);
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201 return 0; // cause the engine to do updates once per frame only
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204 UINT8 YM2612Read_940(void)
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210 int YM2612PicoTick_940(int n)
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215 if(ST_mode & 0x01 && (ST_TAT+=64*n) >= ST_TAC) {
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217 if(ST_mode & 0x04) ST_status |= 1;
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218 // CSM mode total level latch and auto key on
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220 if(ST_mode & 0x80) {
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221 CSMKeyControll( &(ym2612_940->CH[2]) ); // Vectorman2, etc.
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228 if(ST_mode & 0x02 && (ST_TBT+=64*n) >= ST_TBC) {
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230 if(ST_mode & 0x08) ST_status |= 2;
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237 #define CHECK_BUSY(job) \
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238 (gp2x_memregs[0x3b46>>1] & (1<<(job-1)))
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240 static void wait_busy_940(int job)
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245 for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)
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246 spend_cycles(8*1024); // tested to be best for mp3 dec
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247 if (i < 0x10000) return;
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250 printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);
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251 for (i = 0; i < 8; i++)
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252 printf("%i ", shared_ctl->vstarts[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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257 printf("trying to interrupt..\n");
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258 gp2x_memregs[0x3B3E>>1] = 0xffff;
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259 for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)
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260 spend_cycles(8*1024);
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261 printf("i = 0x%x\n", i);
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262 printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",
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263 gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);
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264 printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);
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266 strcpy(menuErrorMsg, "940 crashed.");
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267 engineState = PGS_Menu;
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272 static void add_job_940(int job)
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274 if (job <= 0 || job > 16) {
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275 printf("add_job_940: bad job: %i\n", job);
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279 // generate interrupt for this job
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281 gp2x_memregs[(0x3B20+job*2)>>1] = 1;
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283 // printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);
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287 void YM2612PicoStateLoad_940(void)
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289 int i, old_A1 = addr_A1;
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291 // feed all the registers and update internal state
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292 for(i = 0; i < 0x100; i++) {
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293 YM2612Write_940(0, i);
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294 YM2612Write_940(1, REGS[i]);
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296 for(i = 0; i < 0x100; i++) {
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297 YM2612Write_940(2, i);
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298 YM2612Write_940(3, REGS[i|0x100]);
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303 add_job_940(JOB940_PICOSTATELOAD);
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307 static void internal_reset(void)
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311 ST_status = 0; /* normal mode */
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320 /* this must be called after mmu hack, the allocated regions must not get cached */
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321 void sharedmem_init(void)
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323 if (shared_mem != NULL) return;
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325 shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);
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326 if(shared_mem == MAP_FAILED)
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328 printf("mmap(shared_data) failed with %i\n", errno);
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331 shared_data = (_940_data_t *) (shared_mem+0x100000);
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332 /* this area must not get buffered on either side */
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333 shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);
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334 mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x3000000);
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335 if (mp3_mem == MAP_FAILED)
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337 printf("mmap(mp3_mem) failed with %i\n", errno);
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344 void sharedmem_deinit(void)
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346 munmap(shared_mem, 0x210000);
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347 munmap(mp3_mem, MP3_SIZE_MAX);
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348 shared_mem = mp3_mem = NULL;
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349 shared_data = NULL;
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354 extern char **g_argv;
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356 /* none of the functions in this file should be called before this one */
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357 void YM2612Init_940(int baseclock, int rate)
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359 printf("YM2612Init_940()\n");
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360 printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));
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365 gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920
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366 gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940
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368 gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated
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369 gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller
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374 unsigned char ucData[1024];
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375 int nRead, i, nLen = 0;
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376 char binpath[1024];
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379 strncpy(binpath, g_argv[0], 1023);
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381 for (i = strlen(binpath); i > 0; i--)
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382 if (binpath[i] == '/') { binpath[i] = 0; break; }
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383 strcat(binpath, "/code940.bin");
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385 fp = fopen(binpath, "rb");
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388 memset(gp2x_screen, 0, 320*240);
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389 gp2x_text_out8(10, 100, "failed to open required file:");
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390 gp2x_text_out8(10, 110, "code940.bin");
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392 printf("failed to open %s\n", binpath);
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398 nRead = fread(ucData, 1, 1024, fp);
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401 memcpy(shared_mem + nLen, ucData, nRead);
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408 memset(shared_data, 0, sizeof(*shared_data));
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409 memset(shared_ctl, 0, sizeof(*shared_ctl));
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411 REGS = YM2612GetRegs();
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413 ym2612_dacen = &dacen;
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414 ym2612_dacout = &dacout;
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420 gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940
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421 gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND
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422 gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND
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424 /* start the 940 */
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428 // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT
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430 /* now cause 940 to init it's ym2612 stuff */
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431 shared_ctl->baseclock = baseclock;
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432 shared_ctl->rate = rate;
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433 add_job_940(JOB940_INITALL);
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437 void YM2612ResetChip_940(void)
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439 printf("YM2612ResetChip_940()\n");
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440 if (shared_data == NULL) {
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441 printf("YM2612ResetChip_940: reset before init?\n");
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447 add_job_940(JOB940_YM2612RESETCHIP);
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451 int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)
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453 int *ym_buf = shared_data->ym_buffer;
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456 //printf("YM2612UpdateOne_940()\n");
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458 if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);
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460 ym_active_chs = shared_ctl->ym_active_chs;
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462 // mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash
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463 if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);
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464 else memset32(buffer, 0, length<<stereo);
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466 if (shared_ctl->writebuffsel == 1) {
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467 shared_ctl->writebuff0[writebuff_ptr] = 0xffff;
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469 shared_ctl->writebuff1[writebuff_ptr] = 0xffff;
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473 /* predict sample counter for next frame */
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474 if (PsndLen_exc_add) {
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475 if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length = PsndLen + 1;
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476 else length = PsndLen;
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479 /* give 940 ym job */
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480 shared_ctl->writebuffsel ^= 1;
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481 shared_ctl->length = length;
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482 shared_ctl->stereo = stereo;
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484 add_job_940(JOB940_YM2612UPDATEONE);
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486 return ym_active_chs;
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490 static int mp3_samples_ready = 0, mp3_buffer_offs = 0;
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491 static int mp3_play_bufsel = 0, mp3_job_started = 0;
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493 void mp3_update(int *buffer, int length, int stereo)
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498 // not data track, CDC is reading, playback was started, track not ended
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499 cdda_on = !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1) &&
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500 loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;
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502 if (!cdda_on) return;
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504 if (!(PicoOpt&0x200)) {
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505 mp3_update_local(buffer, length, stereo);
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509 length_mp3 = length;
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510 if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo
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511 else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish
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513 /* do we have to wait? */
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514 if (mp3_job_started && mp3_samples_ready < length_mp3) {
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515 if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);
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516 mp3_job_started = 0;
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517 mp3_samples_ready += 1152;
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520 /* mix mp3 data, only stereo */
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521 if (mp3_samples_ready >= length_mp3)
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524 void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;
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525 if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }
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526 else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }
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528 if (1152 - mp3_buffer_offs >= length_mp3) {
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529 mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);
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531 mp3_buffer_offs += length_mp3;
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533 // collect samples from both buffers..
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534 int left = 1152 - mp3_buffer_offs;
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535 if (mp3_play_bufsel == 0)
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537 mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);
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538 mp3_buffer_offs = length_mp3 - left;
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539 mp3_play_bufsel = 1;
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541 mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);
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542 mp3_buffer_offs = length_mp3 - left;
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543 mix_samples(buffer + ((left>>shr)<<1),
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544 shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);
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545 mp3_play_bufsel = 0;
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548 mp3_samples_ready -= length_mp3;
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551 // ask to decode more if we already can
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552 if (!mp3_job_started)
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554 mp3_job_started = 1;
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555 shared_ctl->mp3_buffsel ^= 1;
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556 add_job_940(JOB940_MP3DECODE);
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561 /***********************************************************/
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563 void mp3_start_play(FILE *f, int pos) // pos is 0-1023
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567 if (!(PicoOpt&0x800)) { // cdda disabled?
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571 if (loaded_mp3 != f)
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573 // printf("loading mp3... "); fflush(stdout);
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574 if (PicoMessage != NULL)
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576 fseek(f, 0, SEEK_END);
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577 if (ftell(f) > 2*1024*1024)
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578 PicoMessage("Loading MP3...");
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580 fseek(f, 0, SEEK_SET);
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581 fread(mp3_mem, 1, MP3_SIZE_MAX, f);
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582 // if (feof(f)) printf("done.\n");
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583 // else printf("done. mp3 too large, not all data loaded.\n");
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584 shared_ctl->mp3_len = ftell(f);
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587 if (PicoOpt&0x200) {
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588 // as we are going to change 940's cacheable area, we must invalidate it's cache..
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589 if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);
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590 add_job_940(JOB940_INVALIDATE_DCACHE);
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596 byte_offs = (shared_ctl->mp3_len << 6) >> 10;
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600 // printf("mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);
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602 shared_ctl->mp3_offs = byte_offs;
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604 // reset buffer pointers and stuff..
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605 mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;
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606 mp3_job_started = 0;
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607 shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode
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609 if (!(PicoOpt&0x200)) mp3_start_local();
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613 int mp3_get_offset(void)
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618 cdda_on = (PicoMCD & 1) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&
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619 (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;
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622 offs1024 = shared_ctl->mp3_offs << 7;
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623 offs1024 /= shared_ctl->mp3_len;
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626 printf("offs1024=%i (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);
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