Pico/cd/LC89510.c

   1 /***********************************************************\r
   2  *                                                         *\r
   3  * This source is taken from the Gens project              *\r
   4  * Written by Stéphane Dallongeville                       *\r
   5  * Copyright (c) 2002 by Stéphane Dallongeville            *\r
   6  * Modified/adapted for Picodrive by notaz, 2007           *\r
   7  *                                                         *\r
   8  ***********************************************************/\r
   9 \r
  10 #include "../PicoInt.h"\r
  11 \r
  12 #define cdprintf dprintf\r
  13 //#define cdprintf(x...)\r
  14 \r
  15 \r
  16 #define CDC_DMA_SPEED 256\r
  17 \r
  18 \r
  19 static void CDD_Reset(void)\r
  20 {\r
  21         // Reseting CDD\r
  22 \r
  23         memset(Pico_mcd->s68k_regs+0x34, 0, 2*2); // CDD.Fader, CDD.Control\r
  24         Pico_mcd->cdd.Status = 0;\r
  25         Pico_mcd->cdd.Minute = 0;\r
  26         Pico_mcd->cdd.Seconde = 0;\r
  27         Pico_mcd->cdd.Frame = 0;\r
  28         Pico_mcd->cdd.Ext = 0;\r
  29 \r
  30         // clear receive status and transfer command\r
  31         memset(Pico_mcd->s68k_regs+0x38, 0, 20);\r
  32         Pico_mcd->s68k_regs[0x38+9] = 0xF;              // Default checksum\r
  33 }\r
  34 \r
  35 \r
  36 static void CDC_Reset(void)\r
  37 {\r
  38         // Reseting CDC\r
  39 \r
  40         memset(Pico_mcd->cdc.Buffer, 0, (16 * 1024 * 2) + 2352);\r
  41 \r
  42         CDC_Update_Header();\r
  43 \r
  44         Pico_mcd->cdc.COMIN = 0;\r
  45         Pico_mcd->cdc.IFSTAT = 0xFF;\r
  46         Pico_mcd->cdc.DAC.N = 0;\r
  47         Pico_mcd->cdc.DBC.N = 0;\r
  48         Pico_mcd->cdc.HEAD.N = 0x01000000;\r
  49         Pico_mcd->cdc.PT.N = 0;\r
  50         Pico_mcd->cdc.WA.N = 2352 * 2;\r
  51         Pico_mcd->cdc.STAT.N = 0x00000080;\r
  52         Pico_mcd->cdc.SBOUT = 0;\r
  53         Pico_mcd->cdc.IFCTRL = 0;\r
  54         Pico_mcd->cdc.CTRL.N = 0;\r
  55 \r
  56         Pico_mcd->cdd.CDC_Decode_Reg_Read = 0;\r
  57         Pico_mcd->scd.Status_CDC &= ~0x08;\r
  58 }\r
  59 \r
  60 \r
  61 void LC89510_Reset(void)\r
  62 {\r
  63         CDD_Reset();\r
  64         CDC_Reset();\r
  65 \r
  66         // clear DMA_Adr & Stop_Watch\r
  67         memset(Pico_mcd->s68k_regs + 0xA, 0, 4);\r
  68 }\r
  69 \r
  70 \r
  71 void Update_CDC_TRansfer(int which)\r
  72 {\r
  73         unsigned int DMA_Adr, dep, length, len;\r
  74         unsigned short *dest;\r
  75         unsigned char  *src;\r
  76 \r
  77         if (Pico_mcd->cdc.DBC.N <= (CDC_DMA_SPEED * 2))\r
  78         {\r
  79                 length = (Pico_mcd->cdc.DBC.N + 1) >> 1;\r
  80                 Pico_mcd->scd.Status_CDC &= ~0x08;      // Last transfer\r
  81                 Pico_mcd->s68k_regs[4] |=  0x80;        // End data transfer\r
  82                 Pico_mcd->s68k_regs[4] &= ~0x40;        // no more data ready\r
  83                 Pico_mcd->cdc.IFSTAT |= 0x08;           // No more data transfer in progress\r
  84 \r
  85                 if (Pico_mcd->cdc.IFCTRL & 0x40)        // DTEIEN = Data Trasnfer End Interrupt Enable ?\r
  86                 {\r
  87                         Pico_mcd->cdc.IFSTAT &= ~0x40;\r
  88 \r
  89                         if (Pico_mcd->s68k_regs[0x33] & (1<<5))\r
  90                         {\r
  91                                 dprintf("cdc DTE irq 5");\r
  92                                 SekInterruptS68k(5);\r
  93                         }\r
  94                 }\r
  95         }\r
  96         else length = CDC_DMA_SPEED;\r
  97 \r
  98 \r
  99         // TODO: dst bounds checking? DAC.N alignment?\r
 100         src = Pico_mcd->cdc.Buffer + Pico_mcd->cdc.DAC.N;\r
 101         DMA_Adr = (Pico_mcd->s68k_regs[0xA]<<8) | Pico_mcd->s68k_regs[0xB];\r
 102 \r
 103         if (which == 7) // WORD RAM\r
 104         {\r
 105                 if (Pico_mcd->s68k_regs[3] & 4)\r
 106                 {\r
 107                         dep = ((DMA_Adr & 0x3FFF) << 3);\r
 108                         cdprintf("CD DMA # %04x -> word_ram1M # %06x, len=%i",\r
 109                                         Pico_mcd->cdc.DAC.N, dep, length);\r
 110 \r
 111                         dep = ((DMA_Adr & 0x3FFF) << 4);\r
 112                         if (!(Pico_mcd->s68k_regs[3]&1)) dep += 2;\r
 113                         dest = (unsigned short *) (Pico_mcd->word_ram + dep);\r
 114 \r
 115                         for (len = length; len > 0; len--, src+=2, dest+=2)\r
 116                                 *dest = (src[0]<<8) | src[1];\r
 117                 }\r
 118                 else\r
 119                 {\r
 120                         dep = ((DMA_Adr & 0x7FFF) << 3);\r
 121                         cdprintf("CD DMA # %04x -> word_ram2M # %06x, len=%i",\r
 122                                         Pico_mcd->cdc.DAC.N, dep, length);\r
 123                         dest = (unsigned short *) (Pico_mcd->word_ram + dep);\r
 124 \r
 125                         for (len = length; len > 0; len--, src+=2, dest++)\r
 126                                 *dest = (src[0]<<8) | src[1];\r
 127                 }\r
 128         }\r
 129         else if (which == 4) // PCM RAM\r
 130         {\r
 131 #if 0\r
 132                         dest = (unsigned char *) Ram_PCM;\r
 133                         dep = ((DMA_Adr & 0x03FF) << 2) + PCM_Chip.Bank;\r
 134 #else\r
 135                         cdprintf("CD DMA # %04x -> PCD TODO", Pico_mcd->cdc.DAC.N);\r
 136 #endif\r
 137         }\r
 138         else if (which == 5) // PRG RAM\r
 139         {\r
 140                 dep = DMA_Adr << 3;\r
 141                 dest = (unsigned short *) (Pico_mcd->prg_ram + dep);\r
 142                 cdprintf("CD DMA # %04x -> prg_ram # %06x, len=%i",\r
 143                                 Pico_mcd->cdc.DAC.N, dep, length);\r
 144 \r
 145                 for (len = length; len > 0; len--, src+=2, dest++)\r
 146                         *dest = (src[0]<<8) | src[1];\r
 147         }\r
 148 \r
 149         length <<= 1;\r
 150         Pico_mcd->cdc.DAC.N = (Pico_mcd->cdc.DAC.N + length) & 0xFFFF;\r
 151         if (Pico_mcd->scd.Status_CDC & 0x08) Pico_mcd->cdc.DBC.N -= length;\r
 152         else Pico_mcd->cdc.DBC.N = 0;\r
 153 }\r
 154 \r
 155 \r
 156 unsigned short Read_CDC_Host(int is_sub)\r
 157 {\r
 158         int addr;\r
 159 \r
 160         if (!(Pico_mcd->scd.Status_CDC & 0x08))\r
 161         {\r
 162                 // Transfer data disabled\r
 163                 cdprintf("Read_CDC_Host: Transfer data disabled");\r
 164                 return 0;\r
 165         }\r
 166 \r
 167         if ((is_sub && (Pico_mcd->s68k_regs[4] & 7) != 3) ||\r
 168                 (!is_sub && (Pico_mcd->s68k_regs[4] & 7) != 2))\r
 169         {\r
 170                 // Wrong setting\r
 171                 cdprintf("Read_CDC_Host: Wrong setting");\r
 172                 return 0;\r
 173         }\r
 174 \r
 175         Pico_mcd->cdc.DBC.N -= 2;\r
 176 \r
 177         if (Pico_mcd->cdc.DBC.N <= 0)\r
 178         {\r
 179                 Pico_mcd->cdc.DBC.N = 0;\r
 180                 Pico_mcd->scd.Status_CDC &= ~0x08;              // Last transfer\r
 181                 Pico_mcd->s68k_regs[4] |=  0x80;                // End data transfer\r
 182                 Pico_mcd->s68k_regs[4] &= ~0x40;                // no more data ready\r
 183                 Pico_mcd->cdc.IFSTAT |= 0x08;                   // No more data transfer in progress\r
 184 \r
 185                 if (Pico_mcd->cdc.IFCTRL & 0x40)                // DTEIEN = Data Transfer End Interrupt Enable ?\r
 186                 {\r
 187                         Pico_mcd->cdc.IFSTAT &= ~0x40;\r
 188 \r
 189                         if (Pico_mcd->s68k_regs[0x33]&(1<<5)) {\r
 190                                 dprintf("m68k: s68k irq 5");\r
 191                                 SekInterruptS68k(5);\r
 192                         }\r
 193 \r
 194                         cdprintf("CDC - DTE interrupt");\r
 195                 }\r
 196         }\r
 197 \r
 198         addr = Pico_mcd->cdc.DAC.N;\r
 199         Pico_mcd->cdc.DAC.N += 2;\r
 200 \r
 201         cdprintf("Read_CDC_Host sub=%i d=%04x dac=%04x dbc=%04x", is_sub,\r
 202                 (Pico_mcd->cdc.Buffer[addr]<<8) | Pico_mcd->cdc.Buffer[addr+1], Pico_mcd->cdc.DAC.N, Pico_mcd->cdc.DBC.N);\r
 203 \r
 204         return (Pico_mcd->cdc.Buffer[addr]<<8) | Pico_mcd->cdc.Buffer[addr+1];\r
 205 \r
 206 #if 0\r
 207         __asm\r
 208         {\r
 209                 mov esi, Pico_mcd->cdc.DAC.N\r
 210                 lea ebx, Pico_mcd->cdc.Buffer\r
 211 //                              and esi, 0x3FFF\r
 212                 mov ax, [ebx + esi]\r
 213                 add esi, 2\r
 214                 rol ax, 8\r
 215                 mov Pico_mcd->cdc.DAC.N, esi\r
 216                 mov val, ax\r
 217         }\r
 218 #endif\r
 219 }\r
 220 \r
 221 \r
 222 void CDC_Update_Header(void)\r
 223 {\r
 224         if (Pico_mcd->cdc.CTRL.B.B1 & 0x01)             // Sub-Header wanted ?\r
 225         {\r
 226                 Pico_mcd->cdc.HEAD.B.B0 = 0;\r
 227                 Pico_mcd->cdc.HEAD.B.B1 = 0;\r
 228                 Pico_mcd->cdc.HEAD.B.B2 = 0;\r
 229                 Pico_mcd->cdc.HEAD.B.B3 = 0;\r
 230         }\r
 231         else\r
 232         {\r
 233                 _msf MSF;\r
 234 \r
 235                 LBA_to_MSF(Pico_mcd->scd.Cur_LBA, &MSF);\r
 236 \r
 237                 Pico_mcd->cdc.HEAD.B.B0 = INT_TO_BCDB(MSF.M);\r
 238                 Pico_mcd->cdc.HEAD.B.B1 = INT_TO_BCDB(MSF.S);\r
 239                 Pico_mcd->cdc.HEAD.B.B2 = INT_TO_BCDB(MSF.F);\r
 240                 Pico_mcd->cdc.HEAD.B.B3 = 0x01;\r
 241         }\r
 242 }\r
 243 \r
 244 \r
 245 unsigned char CDC_Read_Reg(void)\r
 246 {\r
 247         unsigned char ret;\r
 248 \r
 249         switch(Pico_mcd->s68k_regs[5] & 0xF)\r
 250         {\r
 251                 case 0x0: // COMIN\r
 252                         cdprintf("CDC read reg 00 = %.2X", Pico_mcd->cdc.COMIN);\r
 253 \r
 254                         Pico_mcd->s68k_regs[5] = 0x1;\r
 255                         return Pico_mcd->cdc.COMIN;\r
 256 \r
 257                 case 0x1: // IFSTAT\r
 258                         cdprintf("CDC read reg 01 = %.2X", Pico_mcd->cdc.IFSTAT);\r
 259 \r
 260                         Pico_mcd->cdd.CDC_Decode_Reg_Read |= (1 << 1);          // Reg 1 (decoding)\r
 261                         Pico_mcd->s68k_regs[5] = 0x2;\r
 262                         return Pico_mcd->cdc.IFSTAT;\r
 263 \r
 264                 case 0x2: // DBCL\r
 265                         cdprintf("CDC read reg 02 = %.2X", Pico_mcd->cdc.DBC.B.L);\r
 266 \r
 267                         Pico_mcd->s68k_regs[5] = 0x3;\r
 268                         return Pico_mcd->cdc.DBC.B.L;\r
 269 \r
 270                 case 0x3: // DBCH\r
 271                         cdprintf("CDC read reg 03 = %.2X", Pico_mcd->cdc.DBC.B.H);\r
 272 \r
 273                         Pico_mcd->s68k_regs[5] = 0x4;\r
 274                         return Pico_mcd->cdc.DBC.B.H;\r
 275 \r
 276                 case 0x4: // HEAD0\r
 277                         cdprintf("CDC read reg 04 = %.2X", Pico_mcd->cdc.HEAD.B.B0);\r
 278 \r
 279                         Pico_mcd->cdd.CDC_Decode_Reg_Read |= (1 << 4);          // Reg 4 (decoding)\r
 280                         Pico_mcd->s68k_regs[5] = 0x5;\r
 281                         return Pico_mcd->cdc.HEAD.B.B0;\r
 282 \r
 283                 case 0x5: // HEAD1\r
 284                         cdprintf("CDC read reg 05 = %.2X", Pico_mcd->cdc.HEAD.B.B1);\r
 285 \r
 286                         Pico_mcd->cdd.CDC_Decode_Reg_Read |= (1 << 5);          // Reg 5 (decoding)\r
 287                         Pico_mcd->s68k_regs[5] = 0x6;\r
 288                         return Pico_mcd->cdc.HEAD.B.B1;\r
 289 \r
 290                 case 0x6: // HEAD2\r
 291                         cdprintf("CDC read reg 06 = %.2X", Pico_mcd->cdc.HEAD.B.B2);\r
 292 \r
 293                         Pico_mcd->cdd.CDC_Decode_Reg_Read |= (1 << 6);          // Reg 6 (decoding)\r
 294                         Pico_mcd->s68k_regs[5] = 0x7;\r
 295                         return Pico_mcd->cdc.HEAD.B.B2;\r
 296 \r
 297                 case 0x7: // HEAD3\r
 298                         cdprintf("CDC read reg 07 = %.2X", Pico_mcd->cdc.HEAD.B.B3);\r
 299 \r
 300                         Pico_mcd->cdd.CDC_Decode_Reg_Read |= (1 << 7);          // Reg 7 (decoding)\r
 301                         Pico_mcd->s68k_regs[5] = 0x8;\r
 302                         return Pico_mcd->cdc.HEAD.B.B3;\r
 303 \r
 304                 case 0x8: // PTL\r
 305                         cdprintf("CDC read reg 08 = %.2X", Pico_mcd->cdc.PT.B.L);\r
 306 \r
 307                         Pico_mcd->cdd.CDC_Decode_Reg_Read |= (1 << 8);          // Reg 8 (decoding)\r
 308                         Pico_mcd->s68k_regs[5] = 0x9;\r
 309                         return Pico_mcd->cdc.PT.B.L;\r
 310 \r
 311                 case 0x9: // PTH\r
 312                         cdprintf("CDC read reg 09 = %.2X", Pico_mcd->cdc.PT.B.H);\r
 313 \r
 314                         Pico_mcd->cdd.CDC_Decode_Reg_Read |= (1 << 9);          // Reg 9 (decoding)\r
 315                         Pico_mcd->s68k_regs[5] = 0xA;\r
 316                         return Pico_mcd->cdc.PT.B.H;\r
 317 \r
 318                 case 0xA: // WAL\r
 319                         cdprintf("CDC read reg 10 = %.2X", Pico_mcd->cdc.WA.B.L);\r
 320 \r
 321                         Pico_mcd->s68k_regs[5] = 0xB;\r
 322                         return Pico_mcd->cdc.WA.B.L;\r
 323 \r
 324                 case 0xB: // WAH\r
 325                         cdprintf("CDC read reg 11 = %.2X", Pico_mcd->cdc.WA.B.H);\r
 326 \r
 327                         Pico_mcd->s68k_regs[5] = 0xC;\r
 328                         return Pico_mcd->cdc.WA.B.H;\r
 329 \r
 330                 case 0xC: // STAT0\r
 331                         cdprintf("CDC read reg 12 = %.2X", Pico_mcd->cdc.STAT.B.B0);\r
 332 \r
 333                         Pico_mcd->cdd.CDC_Decode_Reg_Read |= (1 << 12);         // Reg 12 (decoding)\r
 334                         Pico_mcd->s68k_regs[5] = 0xD;\r
 335                         return Pico_mcd->cdc.STAT.B.B0;\r
 336 \r
 337                 case 0xD: // STAT1\r
 338                         cdprintf("CDC read reg 13 = %.2X", Pico_mcd->cdc.STAT.B.B1);\r
 339 \r
 340                         Pico_mcd->cdd.CDC_Decode_Reg_Read |= (1 << 13);         // Reg 13 (decoding)\r
 341                         Pico_mcd->s68k_regs[5] = 0xE;\r
 342                         return Pico_mcd->cdc.STAT.B.B1;\r
 343 \r
 344                 case 0xE: // STAT2\r
 345                         cdprintf("CDC read reg 14 = %.2X", Pico_mcd->cdc.STAT.B.B2);\r
 346 \r
 347                         Pico_mcd->cdd.CDC_Decode_Reg_Read |= (1 << 14);         // Reg 14 (decoding)\r
 348                         Pico_mcd->s68k_regs[5] = 0xF;\r
 349                         return Pico_mcd->cdc.STAT.B.B2;\r
 350 \r
 351                 case 0xF: // STAT3\r
 352                         cdprintf("CDC read reg 15 = %.2X", Pico_mcd->cdc.STAT.B.B3);\r
 353 \r
 354                         ret = Pico_mcd->cdc.STAT.B.B3;\r
 355                         Pico_mcd->cdc.IFSTAT |= 0x20;                   // decoding interrupt flag cleared\r
 356                         if ((Pico_mcd->cdc.CTRL.B.B0 & 0x80) && (Pico_mcd->cdc.IFCTRL & 0x20))\r
 357                         {\r
 358                                 if ((Pico_mcd->cdd.CDC_Decode_Reg_Read & 0x73F2) == 0x73F2)\r
 359                                         Pico_mcd->cdc.STAT.B.B3 = 0x80;\r
 360                         }\r
 361                         return ret;\r
 362         }\r
 363 \r
 364         return 0;\r
 365 }\r
 366 \r
 367 \r
 368 void CDC_Write_Reg(unsigned char Data)\r
 369 {\r
 370         cdprintf("CDC write reg%02d = %.2X", Pico_mcd->s68k_regs[5] & 0xF, Data);\r
 371 \r
 372         switch (Pico_mcd->s68k_regs[5] & 0xF)\r
 373         {\r
 374                 case 0x0: // SBOUT\r
 375                         Pico_mcd->s68k_regs[5] = 0x1;\r
 376                         Pico_mcd->cdc.SBOUT = Data;\r
 377 \r
 378                         break;\r
 379 \r
 380                 case 0x1: // IFCTRL\r
 381                         Pico_mcd->s68k_regs[5] = 0x2;\r
 382                         Pico_mcd->cdc.IFCTRL = Data;\r
 383 \r
 384                         if ((Pico_mcd->cdc.IFCTRL & 0x02) == 0)         // Stop data transfer\r
 385                         {\r
 386                                 Pico_mcd->cdc.DBC.N = 0;\r
 387                                 Pico_mcd->scd.Status_CDC &= ~0x08;\r
 388                                 Pico_mcd->cdc.IFSTAT |= 0x08;           // No more data transfer in progress\r
 389                         }\r
 390                         break;\r
 391 \r
 392                 case 0x2: // DBCL\r
 393                         Pico_mcd->s68k_regs[5] = 0x3;\r
 394                         Pico_mcd->cdc.DBC.B.L = Data;\r
 395 \r
 396                         break;\r
 397 \r
 398                 case 0x3: // DBCH\r
 399                         Pico_mcd->s68k_regs[5] = 0x4;\r
 400                         Pico_mcd->cdc.DBC.B.H = Data;\r
 401 \r
 402                         break;\r
 403 \r
 404                 case 0x4: // DACL\r
 405                         Pico_mcd->s68k_regs[5] = 0x5;\r
 406                         Pico_mcd->cdc.DAC.B.L = Data;\r
 407 \r
 408                         break;\r
 409 \r
 410                 case 0x5: // DACH\r
 411                         Pico_mcd->s68k_regs[5] = 0x6;\r
 412                         Pico_mcd->cdc.DAC.B.H = Data;\r
 413 \r
 414                         break;\r
 415 \r
 416                 case 0x6: // DTTRG\r
 417                         if (Pico_mcd->cdc.IFCTRL & 0x02)                // Data transfer enable ?\r
 418                         {\r
 419                                 Pico_mcd->cdc.IFSTAT &= ~0x08;          // Data transfer in progress\r
 420                                 Pico_mcd->scd.Status_CDC |= 0x08;       // Data transfer in progress\r
 421                                 Pico_mcd->s68k_regs[4] &= 0x7F;         // A data transfer start\r
 422 \r
 423                                 cdprintf("************** Starting Data Transfer ***********");\r
 424                                 cdprintf("RS0 = %.4X  DAC = %.4X  DBC = %.4X  DMA adr = %.4X\n\n", Pico_mcd->s68k_regs[4]<<8,\r
 425                                         Pico_mcd->cdc.DAC.N, Pico_mcd->cdc.DBC.N, (Pico_mcd->s68k_regs[0xA]<<8) | Pico_mcd->s68k_regs[0xB]);\r
 426                         }\r
 427                         break;\r
 428 \r
 429                 case 0x7: // DTACK\r
 430                         Pico_mcd->cdc.IFSTAT |= 0x40;                   // end data transfer interrupt flag cleared\r
 431                         break;\r
 432 \r
 433                 case 0x8: // WAL\r
 434                         Pico_mcd->s68k_regs[5] = 0x9;\r
 435                         Pico_mcd->cdc.WA.B.L = Data;\r
 436 \r
 437                         break;\r
 438 \r
 439                 case 0x9: // WAH\r
 440                         Pico_mcd->s68k_regs[5] = 0xA;\r
 441                         Pico_mcd->cdc.WA.B.H = Data;\r
 442 \r
 443                         break;\r
 444 \r
 445                 case 0xA: // CTRL0\r
 446                         Pico_mcd->s68k_regs[5] = 0xB;\r
 447                         Pico_mcd->cdc.CTRL.B.B0 = Data;\r
 448 \r
 449                         break;\r
 450 \r
 451                 case 0xB: // CTRL1\r
 452                         Pico_mcd->s68k_regs[5] = 0xC;\r
 453                         Pico_mcd->cdc.CTRL.B.B1 = Data;\r
 454 \r
 455                         break;\r
 456 \r
 457                 case 0xC: // PTL\r
 458                         Pico_mcd->s68k_regs[5] = 0xD;\r
 459                         Pico_mcd->cdc.PT.B.L = Data;\r
 460 \r
 461                         break;\r
 462 \r
 463                 case 0xD: // PTH\r
 464                         Pico_mcd->s68k_regs[5] = 0xE;\r
 465                         Pico_mcd->cdc.PT.B.H = Data;\r
 466 \r
 467                         break;\r
 468 \r
 469                 case 0xE: // CTRL2\r
 470                         Pico_mcd->cdc.CTRL.B.B2 = Data;\r
 471                         break;\r
 472 \r
 473                 case 0xF: // RESET\r
 474                         CDC_Reset();\r
 475                         break;\r
 476         }\r
 477 }\r
 478 \r
 479 \r
 480 static int bswapwrite(int a, unsigned short d)\r
 481 {\r
 482         *(unsigned short *)(Pico_mcd->s68k_regs + a) = (d>>8)|(d<<8);\r
 483         return d + (d >> 8);\r
 484 }\r
 485 \r
 486 void CDD_Export_Status(void)\r
 487 {\r
 488         unsigned int csum;\r
 489 \r
 490         csum  = bswapwrite( 0x38+0, Pico_mcd->cdd.Status);\r
 491         csum += bswapwrite( 0x38+2, Pico_mcd->cdd.Minute);\r
 492         csum += bswapwrite( 0x38+4, Pico_mcd->cdd.Seconde);\r
 493         csum += bswapwrite( 0x38+6, Pico_mcd->cdd.Frame);\r
 494         Pico_mcd->s68k_regs[0x38+8] = Pico_mcd->cdd.Ext;\r
 495         csum += Pico_mcd->cdd.Ext;\r
 496         Pico_mcd->s68k_regs[0x38+9] = ~csum & 0xf;\r
 497 \r
 498         Pico_mcd->s68k_regs[0x37] &= 3; // CDD.Control\r
 499 \r
 500         if (Pico_mcd->s68k_regs[0x33] & (1<<4))\r
 501         {\r
 502                 dprintf("cdd export irq 4");\r
 503                 SekInterruptS68k(4);\r
 504         }\r
 505 \r
 506 //      cdprintf("CDD exported status\n");\r
 507         cdprintf("out:  Status=%.4X, Minute=%.4X, Second=%.4X, Frame=%.4X  Checksum=%.4X",\r
 508                 (Pico_mcd->s68k_regs[0x38+0] << 8) | Pico_mcd->s68k_regs[0x38+1],\r
 509                 (Pico_mcd->s68k_regs[0x38+2] << 8) | Pico_mcd->s68k_regs[0x38+3],\r
 510                 (Pico_mcd->s68k_regs[0x38+4] << 8) | Pico_mcd->s68k_regs[0x38+5],\r
 511                 (Pico_mcd->s68k_regs[0x38+6] << 8) | Pico_mcd->s68k_regs[0x38+7],\r
 512                 (Pico_mcd->s68k_regs[0x38+8] << 8) | Pico_mcd->s68k_regs[0x38+9]);\r
 513 }\r
 514 \r
 515 \r
 516 void CDD_Import_Command(void)\r
 517 {\r
 518 //      cdprintf("CDD importing command\n");\r
 519         cdprintf("in:  Command=%.4X, Minute=%.4X, Second=%.4X, Frame=%.4X  Checksum=%.4X",\r
 520                 (Pico_mcd->s68k_regs[0x38+10+0] << 8) | Pico_mcd->s68k_regs[0x38+10+1],\r
 521                 (Pico_mcd->s68k_regs[0x38+10+2] << 8) | Pico_mcd->s68k_regs[0x38+10+3],\r
 522                 (Pico_mcd->s68k_regs[0x38+10+4] << 8) | Pico_mcd->s68k_regs[0x38+10+5],\r
 523                 (Pico_mcd->s68k_regs[0x38+10+6] << 8) | Pico_mcd->s68k_regs[0x38+10+7],\r
 524                 (Pico_mcd->s68k_regs[0x38+10+8] << 8) | Pico_mcd->s68k_regs[0x38+10+9]);\r
 525 \r
 526         switch (Pico_mcd->s68k_regs[0x38+10+0])\r
 527         {\r
 528                 case 0x0:       // STATUS (?)\r
 529                         Get_Status_CDD_c0();\r
 530                         break;\r
 531 \r
 532                 case 0x1:       // STOP ALL (?)\r
 533                         Stop_CDD_c1();\r
 534                         break;\r
 535 \r
 536                 case 0x2:       // GET TOC INFORMATIONS\r
 537                         switch(Pico_mcd->s68k_regs[0x38+10+3])\r
 538                         {\r
 539                                 case 0x0:       // get current position (MSF format)\r
 540                                         Pico_mcd->cdd.Status = (Pico_mcd->cdd.Status & 0xFF00);\r
 541                                         Get_Pos_CDD_c20();\r
 542                                         break;\r
 543 \r
 544                                 case 0x1:       // get elapsed time of current track played/scanned (relative MSF format)\r
 545                                         Pico_mcd->cdd.Status = (Pico_mcd->cdd.Status & 0xFF00) | 1;\r
 546                                         Get_Track_Pos_CDD_c21();\r
 547                                         break;\r
 548 \r
 549                                 case 0x2:       // get current track in RS2-RS3\r
 550                                         Pico_mcd->cdd.Status =  (Pico_mcd->cdd.Status & 0xFF00) | 2;\r
 551                                         Get_Current_Track_CDD_c22();\r
 552                                         break;\r
 553 \r
 554                                 case 0x3:       // get total length (MSF format)\r
 555                                         Pico_mcd->cdd.Status = (Pico_mcd->cdd.Status & 0xFF00) | 3;\r
 556                                         Get_Total_Lenght_CDD_c23();\r
 557                                         break;\r
 558 \r
 559                                 case 0x4:       // first & last track number\r
 560                                         Pico_mcd->cdd.Status = (Pico_mcd->cdd.Status & 0xFF00) | 4;\r
 561                                         Get_First_Last_Track_CDD_c24();\r
 562                                         break;\r
 563 \r
 564                                 case 0x5:       // get track addresse (MSF format)\r
 565                                         Pico_mcd->cdd.Status = (Pico_mcd->cdd.Status & 0xFF00) | 5;\r
 566                                         Get_Track_Adr_CDD_c25();\r
 567                                         break;\r
 568 \r
 569                                 default :       // invalid, then we return status\r
 570                                         Pico_mcd->cdd.Status = (Pico_mcd->cdd.Status & 0xFF00) | 0xF;\r
 571                                         Get_Status_CDD_c0();\r
 572                                         break;\r
 573                         }\r
 574                         break;\r
 575 \r
 576                 case 0x3:       // READ\r
 577                         Play_CDD_c3();\r
 578                         break;\r
 579 \r
 580                 case 0x4:       // SEEK\r
 581                         Seek_CDD_c4();\r
 582                         break;\r
 583 \r
 584                 case 0x6:       // PAUSE/STOP\r
 585                         Pause_CDD_c6();\r
 586                         break;\r
 587 \r
 588                 case 0x7:       // RESUME\r
 589                         Resume_CDD_c7();\r
 590                         break;\r
 591 \r
 592                 case 0x8:       // FAST FOWARD\r
 593                         Fast_Foward_CDD_c8();\r
 594                         break;\r
 595 \r
 596                 case 0x9:       // FAST REWIND\r
 597                         Fast_Rewind_CDD_c9();\r
 598                         break;\r
 599 \r
 600                 case 0xA:       // RECOVER INITIAL STATE (?)\r
 601                         CDD_cA();\r
 602                         break;\r
 603 \r
 604                 case 0xC:       // CLOSE TRAY\r
 605                         Close_Tray_CDD_cC();\r
 606                         break;\r
 607 \r
 608                 case 0xD:       // OPEN TRAY\r
 609                         Open_Tray_CDD_cD();\r
 610                         break;\r
 611 \r
 612                 default:        // UNKNOWN\r
 613                         CDD_Def();\r
 614                         break;\r
 615         }\r
 616 }\r
 617 \r