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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15 #include "../../Pico/PicoInt.h"
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17 /* we will need some gp2x internals here */
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18 extern volatile unsigned short *gp2x_memregs; /* from minimal library rlyeh */
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19 extern volatile unsigned long *gp2x_memregl;
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21 static unsigned char *shared_mem = 0;
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22 static _940_data_t *shared_data = 0;
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23 static _940_ctl_t *shared_ctl = 0;
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24 static unsigned char *mp3_mem = 0;
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26 #define MP3_SIZE_MAX (0x1000000 - 4*640*480)
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28 int crashed_940 = 0;
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31 /***********************************************************/
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33 #define MAXOUT (+32767)
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34 #define MINOUT (-32768)
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37 #define Limit(val, max,min) { \
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38 if ( val > max ) val = max; \
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39 else if ( val < min ) val = min; \
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42 /* these will be managed locally on our side */
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43 extern int *ym2612_dacen;
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44 extern INT32 *ym2612_dacout;
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45 extern void *ym2612_regs;
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47 static UINT8 *REGS = 0; /* we will also keep local copy of regs for savestates and such */
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48 static INT32 addr_A1; /* address line A1 */
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50 static INT32 dacout;
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51 static UINT8 ST_address; /* address register */
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52 static UINT8 ST_status; /* status flag */
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53 static UINT8 ST_mode; /* mode CSM / 3SLOT */
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54 static int ST_TA; /* timer a */
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55 static int ST_TAC; /* timer a maxval */
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56 static int ST_TAT; /* timer a ticker */
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57 static UINT8 ST_TB; /* timer b */
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58 static int ST_TBC; /* timer b maxval */
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59 static int ST_TBT; /* timer b ticker */
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61 static int writebuff_ptr = 0;
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64 /* OPN Mode Register Write */
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65 static void set_timers( int v )
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68 /* b6 = 3 slot mode */
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71 /* b3 = timer enable b */
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72 /* b2 = timer enable a */
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77 /* reset Timer b flag */
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81 /* reset Timer a flag */
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89 /* returns 1 if sample affecting state changed */
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90 int YM2612Write_940(unsigned int a, unsigned int v)
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92 int addr; //, ret=1;
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94 v &= 0xff; /* adjust to 8 bit bus */
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98 case 0: /* address port 0 */
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104 case 1: /* data port 0 */
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105 if (addr_A1 != 0) {
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106 return 0; /* verified on real YM2608 */
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112 switch( addr & 0xf0 )
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114 case 0x20: /* 0x20-0x2f Mode */
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117 case 0x24: { // timer A High 8
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118 int TAnew = (ST_TA & 0x03)|(((int)v)<<2);
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119 if(ST_TA != TAnew) {
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120 // we should reset ticker only if new value is written. Outrun requires this.
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122 ST_TAC = (1024-TAnew)*18;
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127 case 0x25: { // timer A Low 2
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128 int TAnew = (ST_TA & 0x3fc)|(v&3);
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129 if(ST_TA != TAnew) {
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131 ST_TAC = (1024-TAnew)*18;
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136 case 0x26: // timer B
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139 ST_TBC = (256-v)<<4;
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144 case 0x27: /* mode, timer control */
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146 break; // other side needs ST.mode for 3slot mode
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147 case 0x2a: /* DAC data (YM2612) */
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148 dacout = ((int)v - 0x80) << 6; /* level unknown (notaz: 8 seems to be too much) */
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150 case 0x2b: /* DAC Sel (YM2612) */
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151 /* b7 = dac enable */
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153 break; // other side has to know this
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161 case 2: /* address port 1 */
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167 case 3: /* data port 1 */
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168 if (addr_A1 != 1) {
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169 return 0; /* verified on real YM2608 */
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172 addr = ST_address | 0x100;
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177 if(currentConfig.EmuOpt & 4) {
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178 /* queue this write for 940 */
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179 if (writebuff_ptr < 2047) {
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180 if (shared_ctl->writebuffsel == 1) {
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181 shared_ctl->writebuff0[writebuff_ptr++] = (a<<8)|v;
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183 shared_ctl->writebuff1[writebuff_ptr++] = (a<<8)|v;
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186 printf("warning: writebuff_ptr > 2047\n");
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190 return 0; // cause the engine to do updates once per frame only
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193 UINT8 YM2612Read_940(void)
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199 int YM2612PicoTick_940(int n)
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204 if(ST_mode & 0x01 && (ST_TAT+=64*n) >= ST_TAC) {
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206 if(ST_mode & 0x04) ST_status |= 1;
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207 // CSM mode total level latch and auto key on
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209 if(ST_mode & 0x80) {
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210 CSMKeyControll( &(ym2612_940->CH[2]) ); // Vectorman2, etc.
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217 if(ST_mode & 0x02 && (ST_TBT+=64*n) >= ST_TBC) {
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219 if(ST_mode & 0x08) ST_status |= 2;
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226 static void wait_busy_940(void)
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230 printf("940 busy, entering wait loop.. (cnt: %i, wc: %i, ve: ", shared_ctl->loopc, shared_ctl->waitc);
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231 for (i = 0; i < 8; i++)
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232 printf("%i ", shared_ctl->vstarts[i]);
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235 for (i = 0; shared_ctl->busy; i++)
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237 spend_cycles(1024); /* needs tuning */
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239 printf("wait iterations: %i\n", i);
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241 for (i = 0; shared_ctl->busy && i < 0x10000; i++)
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242 spend_cycles(8*1024); // tested to be best for mp3 dec
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243 if (i < 0x10000) return;
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246 printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);
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247 for (i = 0; i < 8; i++)
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248 printf("%i ", shared_ctl->vstarts[i]);
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250 strcpy(menuErrorMsg, "940 crashed.");
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251 engineState = PGS_Menu;
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257 static void add_job_940(int job0, int job1)
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259 shared_ctl->jobs[0] = job0;
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260 shared_ctl->jobs[1] = job1;
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261 shared_ctl->busy = 1;
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262 gp2x_memregs[0x3B3E>>1] = 0xffff; // cause an IRQ for 940
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266 void YM2612PicoStateLoad_940(void)
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268 int i, old_A1 = addr_A1;
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270 if (shared_ctl->busy) wait_busy_940();
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272 // feed all the registers and update internal state
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273 for(i = 0; i < 0x100; i++) {
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274 YM2612Write_940(0, i);
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275 YM2612Write_940(1, REGS[i]);
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277 for(i = 0; i < 0x100; i++) {
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278 YM2612Write_940(2, i);
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279 YM2612Write_940(3, REGS[i|0x100]);
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284 add_job_940(JOB940_PICOSTATELOAD, 0);
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288 static void internal_reset(void)
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292 ST_status = 0; /* normal mode */
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301 extern char **g_argv;
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303 /* none of the functions in this file should be called before this one */
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304 void YM2612Init_940(int baseclock, int rate)
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306 printf("YM2612Init_940()\n");
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307 printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));
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312 gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940
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313 gp2x_memregs[0x3B42>>1] = 0xffff; // enable DUALCPU interrupts for 940
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315 gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller
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317 if (shared_mem == NULL)
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319 shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);
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320 if(shared_mem == MAP_FAILED)
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322 printf("mmap(shared_data) failed with %i\n", errno);
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325 shared_data = (_940_data_t *) (shared_mem+0x100000);
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326 /* this area must not get buffered on either side */
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327 shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);
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328 mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x3000000);
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329 if (mp3_mem == MAP_FAILED)
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331 printf("mmap(mp3_mem) failed with %i\n", errno);
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339 unsigned char ucData[1024];
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340 int nRead, i, nLen = 0;
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341 char binpath[1024];
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344 strncpy(binpath, g_argv[0], 1023);
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346 for (i = strlen(binpath); i > 0; i--)
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347 if (binpath[i] == '/') { binpath[i] = 0; break; }
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348 strcat(binpath, "/code940.bin");
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350 fp = fopen(binpath, "rb");
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353 memset(gp2x_screen, 0, 320*240);
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354 gp2x_text_out8(10, 100, "failed to open required file:");
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355 gp2x_text_out8(10, 110, "code940.bin");
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357 printf("failed to open %s\n", binpath);
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363 nRead = fread(ucData, 1, 1024, fp);
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366 memcpy(shared_mem + nLen, ucData, nRead);
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373 memset(shared_data, 0, sizeof(*shared_data));
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374 memset(shared_ctl, 0, sizeof(*shared_ctl));
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376 REGS = YM2612GetRegs();
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378 ym2612_dacen = &dacen;
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379 ym2612_dacout = &dacout;
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383 /* now cause 940 to init it's ym2612 stuff */
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384 shared_ctl->baseclock = baseclock;
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385 shared_ctl->rate = rate;
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386 shared_ctl->jobs[0] = JOB940_INITALL;
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387 shared_ctl->jobs[1] = 0;
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388 shared_ctl->busy = 1;
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390 /* start the 940 */
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394 // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT
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398 void YM2612ResetChip_940(void)
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400 printf("YM2612ResetChip_940()\n");
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401 if (shared_data == NULL) {
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402 printf("YM2612ResetChip_940: reset before init?\n");
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406 if (shared_ctl->busy) wait_busy_940();
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410 add_job_940(JOB940_YM2612RESETCHIP, 0);
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414 static void mix_samples(short *dest_buf, int *ym_buf, short *mp3_buf, int len, int stereo)
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420 for (; len > 0; len--)
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424 l += *ym_buf++; r += *ym_buf++;
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425 lm = *mp3_buf++; rm = *mp3_buf++;
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426 l += lm - lm/2; r += rm - rm/2;
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427 Limit( l, MAXOUT, MINOUT );
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428 Limit( r, MAXOUT, MINOUT );
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429 *dest_buf++ = l; *dest_buf++ = r;
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432 for (; len > 0; len--)
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438 Limit( l, MAXOUT, MINOUT );
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447 for (; len > 0; len--)
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451 l += *ym_buf++, r += *ym_buf++;
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452 Limit( l, MAXOUT, MINOUT );
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453 Limit( r, MAXOUT, MINOUT );
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454 *dest_buf++ = l; *dest_buf++ = r;
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457 for (; len > 0; len--)
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461 Limit( l, MAXOUT, MINOUT );
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469 // here we assume that length is different between games, but constant in one game
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471 static FILE *loaded_mp3 = 0;
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473 void YM2612UpdateOne_940(short *buffer, int length, int stereo)
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475 int cdda_on, *ym_buffer = shared_data->mix_buffer, mp3_job = 0;
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476 static int mp3_samples_ready = 0, mp3_buffer_offs = 0;
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477 static int mp3_play_bufsel = 1;
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479 //printf("YM2612UpdateOne_940()\n");
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480 if (shared_ctl->busy) wait_busy_940();
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482 //printf("940 (cnt: %i, wc: %i, ve: ", shared_ctl->loopc, shared_ctl->waitc);
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483 //for (i = 0; i < 8; i++)
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484 // printf("%i ", shared_ctl->vstarts[i]);
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487 // emulatind MCD, cdda enabled in config, not data track, CDC is reading, playback was started, track not ended
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488 cdda_on = (PicoMCD & 1) && (currentConfig.EmuOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&
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489 (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;
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491 /* mix data from previous go */
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492 if (cdda_on && mp3_samples_ready >= length)
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494 if (1152 - mp3_buffer_offs >= length) {
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495 mix_samples(buffer, ym_buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length, stereo);
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497 mp3_buffer_offs += length;
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499 // collect from both buffers..
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500 int left = 1152 - mp3_buffer_offs;
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501 mix_samples(buffer, ym_buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, left, stereo);
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502 mp3_play_bufsel ^= 1;
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503 mp3_buffer_offs = length - left;
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504 mix_samples(buffer + left * 2, ym_buffer + left * 2,
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505 shared_data->mp3_buffer[mp3_play_bufsel], mp3_buffer_offs, stereo);
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507 mp3_samples_ready -= length;
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509 mix_samples(buffer, ym_buffer, 0, length, stereo);
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512 //printf("new writes: %i\n", writebuff_ptr);
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513 if (shared_ctl->writebuffsel == 1) {
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514 shared_ctl->writebuff0[writebuff_ptr] = 0xffff;
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516 shared_ctl->writebuff1[writebuff_ptr] = 0xffff;
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520 /* give 940 ym job */
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521 shared_ctl->writebuffsel ^= 1;
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522 shared_ctl->length = length;
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523 shared_ctl->stereo = stereo;
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525 // make sure we will have enough mp3 samples next frame
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526 if (cdda_on && mp3_samples_ready < length)
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528 shared_ctl->mp3_buffsel ^= 1;
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529 mp3_job = JOB940_MP3DECODE;
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530 mp3_samples_ready += 1152;
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533 add_job_940(JOB940_YM2612UPDATEONE, mp3_job);
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534 //spend_cycles(512);
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535 //printf("SRCPND: %08lx, INTMODE: %08lx, INTMASK: %08lx, INTPEND: %08lx\n",
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536 // gp2x_memregl[0x4500>>2], gp2x_memregl[0x4504>>2], gp2x_memregl[0x4508>>2], gp2x_memregl[0x4510>>2]);
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540 /***********************************************************/
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542 void mp3_start_play(FILE *f, int pos) // pos is 0-1023
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546 if (!(currentConfig.EmuOpt&0x800)) { // cdda disabled?
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550 if (loaded_mp3 != f)
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552 printf("loading mp3... "); fflush(stdout);
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553 fseek(f, 0, SEEK_SET);
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554 fread(mp3_mem, 1, MP3_SIZE_MAX, f);
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555 if (feof(f)) printf("done.\n");
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556 else printf("done. mp3 too large, not all data loaded.\n");
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557 shared_ctl->mp3_len = ftell(f);
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563 byte_offs = (shared_ctl->mp3_len << 6) >> 10;
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567 printf("mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);
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569 shared_ctl->mp3_offs = byte_offs;
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