libpcsxcore/sio.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team              *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA.           *
  18  ***************************************************************************/
  19
  20 /*
  21 * SIO functions.
  22 */
  23
  24 #include "sio.h"
  25 #include <sys/stat.h>
  26
  27 // Status Flags
  28 #define TX_RDY          0x0001
  29 #define RX_RDY          0x0002
  30 #define TX_EMPTY        0x0004
  31 #define PARITY_ERR      0x0008
  32 #define RX_OVERRUN      0x0010
  33 #define FRAMING_ERR     0x0020
  34 #define SYNC_DETECT     0x0040
  35 #define DSR                     0x0080
  36 #define CTS                     0x0100
  37 #define IRQ                     0x0200
  38
  39 // Control Flags
  40 #define TX_PERM         0x0001
  41 #define DTR                     0x0002
  42 #define RX_PERM         0x0004
  43 #define BREAK           0x0008
  44 #define RESET_ERR       0x0010
  45 #define RTS                     0x0020
  46 #define SIO_RESET       0x0040
  47
  48 // *** FOR WORKS ON PADS AND MEMORY CARDS *****
  49
  50 static unsigned char buf[256];
  51 unsigned char cardh[4] = { 0x00, 0x00, 0x5a, 0x5d };
  52
  53 // Transfer Ready and the Buffer is Empty
  54 // static unsigned short StatReg = 0x002b;
  55 static unsigned short StatReg = TX_RDY | TX_EMPTY;
  56 static unsigned short ModeReg;
  57 static unsigned short CtrlReg;
  58 static unsigned short BaudReg;
  59
  60 static unsigned int bufcount;
  61 static unsigned int parp;
  62 static unsigned int mcdst, rdwr;
  63 static unsigned char adrH, adrL;
  64 static unsigned int padst;
  65
  66 char Mcd1Data[MCD_SIZE], Mcd2Data[MCD_SIZE];
  67
  68 // clk cycle byte
  69 // 4us * 8bits = (PSXCLK / 1000000) * 32; (linuzappz)
  70 // TODO: add SioModePrescaler and BaudReg
  71 static inline void SIO_INT() {
  72         if (!Config.Sio) {
  73                 psxRegs.interrupt |= 0x80;
  74                 psxRegs.intCycle[7 + 1] = 400;
  75                 psxRegs.intCycle[7] = psxRegs.cycle;
  76         }
  77 }
  78
  79 void sioWrite8(unsigned char value) {
  80 #ifdef PAD_LOG
  81         PAD_LOG("sio write8 %x\n", value);
  82 #endif
  83         switch (padst) {
  84                 case 1: SIO_INT();
  85                         if ((value & 0x40) == 0x40) {
  86                                 padst = 2; parp = 1;
  87                                 if (!Config.UseNet) {
  88                                         switch (CtrlReg & 0x2002) {
  89                                                 case 0x0002:
  90                                                         buf[parp] = PAD1_poll(value);
  91                                                         break;
  92                                                 case 0x2002:
  93                                                         buf[parp] = PAD2_poll(value);
  94                                                         break;
  95                                         }
  96                                 }/* else {
  97 //                                      SysPrintf("%x: %x, %x, %x, %x\n", CtrlReg&0x2002, buf[2], buf[3], buf[4], buf[5]);
  98                                 }*/
  99
 100                                 if (!(buf[parp] & 0x0f)) {
 101                                         bufcount = 2 + 32;
 102                                 } else {
 103                                         bufcount = 2 + (buf[parp] & 0x0f) * 2;
 104                                 }
 105                                 if (buf[parp] == 0x41) {
 106                                         switch (value) {
 107                                                 case 0x43:
 108                                                         buf[1] = 0x43;
 109                                                         break;
 110                                                 case 0x45:
 111                                                         buf[1] = 0xf3;
 112                                                         break;
 113                                         }
 114                                 }
 115                         }
 116                         else padst = 0;
 117                         return;
 118                 case 2:
 119                         parp++;
 120 /*                      if (buf[1] == 0x45) {
 121                                 buf[parp] = 0;
 122                                 SIO_INT();
 123                                 return;
 124                         }*/
 125                         if (!Config.UseNet) {
 126                                 switch (CtrlReg & 0x2002) {
 127                                         case 0x0002: buf[parp] = PAD1_poll(value); break;
 128                                         case 0x2002: buf[parp] = PAD2_poll(value); break;
 129                                 }
 130                         }
 131
 132                         if (parp == bufcount) { padst = 0; return; }
 133                         SIO_INT();
 134                         return;
 135         }
 136
 137         switch (mcdst) {
 138                 case 1:
 139                         SIO_INT();
 140                         if (rdwr) { parp++; return; }
 141                         parp = 1;
 142                         switch (value) {
 143                                 case 0x52: rdwr = 1; break;
 144                                 case 0x57: rdwr = 2; break;
 145                                 default: mcdst = 0;
 146                         }
 147                         return;
 148                 case 2: // address H
 149                         SIO_INT();
 150                         adrH = value;
 151                         *buf = 0;
 152                         parp = 0;
 153                         bufcount = 1;
 154                         mcdst = 3;
 155                         return;
 156                 case 3: // address L
 157                         SIO_INT();
 158                         adrL = value;
 159                         *buf = adrH;
 160                         parp = 0;
 161                         bufcount = 1;
 162                         mcdst = 4;
 163                         return;
 164                 case 4:
 165                         SIO_INT();
 166                         parp = 0;
 167                         switch (rdwr) {
 168                                 case 1: // read
 169                                         buf[0] = 0x5c;
 170                                         buf[1] = 0x5d;
 171                                         buf[2] = adrH;
 172                                         buf[3] = adrL;
 173                                         switch (CtrlReg & 0x2002) {
 174                                                 case 0x0002:
 175                                                         memcpy(&buf[4], Mcd1Data + (adrL | (adrH << 8)) * 128, 128);
 176                                                         break;
 177                                                 case 0x2002:
 178                                                         memcpy(&buf[4], Mcd2Data + (adrL | (adrH << 8)) * 128, 128);
 179                                                         break;
 180                                         }
 181                                         {
 182                                         char xor = 0;
 183                                         int i;
 184                                         for (i = 2; i < 128 + 4; i++)
 185                                                 xor ^= buf[i];
 186                                         buf[132] = xor;
 187                                         }
 188                                         buf[133] = 0x47;
 189                                         bufcount = 133;
 190                                         break;
 191                                 case 2: // write
 192                                         buf[0] = adrL;
 193                                         buf[1] = value;
 194                                         buf[129] = 0x5c;
 195                                         buf[130] = 0x5d;
 196                                         buf[131] = 0x47;
 197                                         bufcount = 131;
 198                                         break;
 199                         }
 200                         mcdst = 5;
 201                         return;
 202                 case 5:
 203                         parp++;
 204                         if (rdwr == 2) {
 205                                 if (parp < 128) buf[parp + 1] = value;
 206                         }
 207                         SIO_INT();
 208                         return;
 209         }
 210
 211         switch (value) {
 212                 case 0x01: // start pad
 213                         StatReg |= RX_RDY;              // Transfer is Ready
 214
 215                         if (!Config.UseNet) {
 216                                 switch (CtrlReg & 0x2002) {
 217                                         case 0x0002: buf[0] = PAD1_startPoll(1); break;
 218                                         case 0x2002: buf[0] = PAD2_startPoll(2); break;
 219                                 }
 220                         } else {
 221                                 if ((CtrlReg & 0x2002) == 0x0002) {
 222                                         int i, j;
 223
 224                                         PAD1_startPoll(1);
 225                                         buf[0] = 0;
 226                                         buf[1] = PAD1_poll(0x42);
 227                                         if (!(buf[1] & 0x0f)) {
 228                                                 bufcount = 32;
 229                                         } else {
 230                                                 bufcount = (buf[1] & 0x0f) * 2;
 231                                         }
 232                                         buf[2] = PAD1_poll(0);
 233                                         i = 3;
 234                                         j = bufcount;
 235                                         while (j--) {
 236                                                 buf[i++] = PAD1_poll(0);
 237                                         }
 238                                         bufcount+= 3;
 239
 240                                         if (NET_sendPadData(buf, bufcount) == -1)
 241                                                 netError();
 242
 243                                         if (NET_recvPadData(buf, 1) == -1)
 244                                                 netError();
 245                                         if (NET_recvPadData(buf + 128, 2) == -1)
 246                                                 netError();
 247                                 } else {
 248                                         memcpy(buf, buf + 128, 32);
 249                                 }
 250                         }
 251
 252                         bufcount = 2;
 253                         parp = 0;
 254                         padst = 1;
 255                         SIO_INT();
 256                         return;
 257                 case 0x81: // start memcard
 258                         StatReg |= RX_RDY;
 259                         memcpy(buf, cardh, 4);
 260                         parp = 0;
 261                         bufcount = 3;
 262                         mcdst = 1;
 263                         rdwr = 0;
 264                         SIO_INT();
 265                         return;
 266         }
 267 }
 268
 269 void sioWriteStat16(unsigned short value) {
 270 }
 271
 272 void sioWriteMode16(unsigned short value) {
 273         ModeReg = value;
 274 }
 275
 276 void sioWriteCtrl16(unsigned short value) {
 277         CtrlReg = value & ~RESET_ERR;
 278         if (value & RESET_ERR) StatReg &= ~IRQ;
 279         if ((CtrlReg & SIO_RESET) || (!CtrlReg)) {
 280                 padst = 0; mcdst = 0; parp = 0;
 281                 StatReg = TX_RDY | TX_EMPTY;
 282                 psxRegs.interrupt &= ~0x80;
 283         }
 284 }
 285
 286 void sioWriteBaud16(unsigned short value) {
 287         BaudReg = value;
 288 }
 289
 290 unsigned char sioRead8() {
 291         unsigned char ret = 0;
 292
 293         if ((StatReg & RX_RDY)/* && (CtrlReg & RX_PERM)*/) {
 294 //              StatReg &= ~RX_OVERRUN;
 295                 ret = buf[parp];
 296                 if (parp == bufcount) {
 297                         StatReg &= ~RX_RDY;             // Receive is not Ready now
 298                         if (mcdst == 5) {
 299                                 mcdst = 0;
 300                                 if (rdwr == 2) {
 301                                         switch (CtrlReg & 0x2002) {
 302                                                 case 0x0002:
 303                                                         memcpy(Mcd1Data + (adrL | (adrH << 8)) * 128, &buf[1], 128);
 304                                                         SaveMcd(Config.Mcd1, Mcd1Data, (adrL | (adrH << 8)) * 128, 128);
 305                                                         break;
 306                                                 case 0x2002:
 307                                                         memcpy(Mcd2Data + (adrL | (adrH << 8)) * 128, &buf[1], 128);
 308                                                         SaveMcd(Config.Mcd2, Mcd2Data, (adrL | (adrH << 8)) * 128, 128);
 309                                                         break;
 310                                         }
 311                                 }
 312                         }
 313                         if (padst == 2) padst = 0;
 314                         if (mcdst == 1) {
 315                                 mcdst = 2;
 316                                 StatReg|= RX_RDY;
 317                         }
 318                 }
 319         }
 320
 321 #ifdef PAD_LOG
 322         PAD_LOG("sio read8 ;ret = %x\n", ret);
 323 #endif
 324         return ret;
 325 }
 326
 327 unsigned short sioReadStat16() {
 328         return StatReg;
 329 }
 330
 331 unsigned short sioReadMode16() {
 332         return ModeReg;
 333 }
 334
 335 unsigned short sioReadCtrl16() {
 336         return CtrlReg;
 337 }
 338
 339 unsigned short sioReadBaud16() {
 340         return BaudReg;
 341 }
 342
 343 void netError() {
 344         ClosePlugins();
 345         SysMessage(_("Connection closed!\n"));
 346
 347         CdromId[0] = '\0';
 348         CdromLabel[0] = '\0';
 349
 350         SysRunGui();
 351 }
 352
 353 void sioInterrupt() {
 354 #ifdef PAD_LOG
 355         PAD_LOG("Sio Interrupt (CP0.Status = %x)\n", psxRegs.CP0.n.Status);
 356 #endif
 357 //      SysPrintf("Sio Interrupt\n");
 358         StatReg |= IRQ;
 359         psxHu32ref(0x1070) |= SWAPu32(0x80);
 360 }
 361
 362 void LoadMcd(int mcd, char *str) {
 363         FILE *f;
 364         char *data = NULL;
 365
 366         if (mcd == 1) data = Mcd1Data;
 367         if (mcd == 2) data = Mcd2Data;
 368
 369         if (*str == 0) {
 370                 sprintf(str, "memcards/card%d.mcd", mcd);
 371                 SysPrintf(_("No memory card value was specified - creating a default card %s\n"), str);
 372         }
 373         f = fopen(str, "rb");
 374         if (f == NULL) {
 375                 SysPrintf(_("The memory card %s doesn't exist - creating it\n"), str);
 376                 CreateMcd(str);
 377                 f = fopen(str, "rb");
 378                 if (f != NULL) {
 379                         struct stat buf;
 380
 381                         if (stat(str, &buf) != -1) {
 382                                 if (buf.st_size == MCD_SIZE + 64)
 383                                         fseek(f, 64, SEEK_SET);
 384                                 else if(buf.st_size == MCD_SIZE + 3904)
 385                                         fseek(f, 3904, SEEK_SET);
 386                         }
 387                         fread(data, 1, MCD_SIZE, f);
 388                         fclose(f);
 389                 }
 390                 else
 391                         SysMessage(_("Memory card %s failed to load!\n"), str);
 392         }
 393         else {
 394                 struct stat buf;
 395                 SysPrintf(_("Loading memory card %s\n"), str);
 396                 if (stat(str, &buf) != -1) {
 397                         if (buf.st_size == MCD_SIZE + 64)
 398                                 fseek(f, 64, SEEK_SET);
 399                         else if(buf.st_size == MCD_SIZE + 3904)
 400                                 fseek(f, 3904, SEEK_SET);
 401                 }
 402                 fread(data, 1, MCD_SIZE, f);
 403                 fclose(f);
 404         }
 405 }
 406
 407 void LoadMcds(char *mcd1, char *mcd2) {
 408         LoadMcd(1, mcd1);
 409         LoadMcd(2, mcd2);
 410 }
 411
 412 void SaveMcd(char *mcd, char *data, uint32_t adr, int size) {
 413         FILE *f;
 414
 415         f = fopen(mcd, "r+b");
 416         if (f != NULL) {
 417                 struct stat buf;
 418
 419                 if (stat(mcd, &buf) != -1) {
 420                         if (buf.st_size == MCD_SIZE + 64)
 421                                 fseek(f, adr + 64, SEEK_SET);
 422                         else if (buf.st_size == MCD_SIZE + 3904)
 423                                 fseek(f, adr + 3904, SEEK_SET);
 424                         else
 425                                 fseek(f, adr, SEEK_SET);
 426                 } else
 427                         fseek(f, adr, SEEK_SET);
 428
 429                 fwrite(data + adr, 1, size, f);
 430                 fclose(f);
 431                 return;
 432         }
 433
 434 #if 0
 435         // try to create it again if we can't open it
 436         f = fopen(mcd, "wb");
 437         if (f != NULL) {
 438                 fwrite(data, 1, MCD_SIZE, f);
 439                 fclose(f);
 440         }
 441 #endif
 442
 443         ConvertMcd(mcd, data);
 444 }
 445
 446 void CreateMcd(char *mcd) {
 447         FILE *f;
 448         struct stat buf;
 449         int s = MCD_SIZE;
 450         int i = 0, j;
 451
 452         f = fopen(mcd, "wb");
 453         if (f == NULL)
 454                 return;
 455
 456         if (stat(mcd, &buf) != -1) {
 457                 if ((buf.st_size == MCD_SIZE + 3904) || strstr(mcd, ".gme")) {
 458                         s = s + 3904;
 459                         fputc('1', f);
 460                         s--;
 461                         fputc('2', f);
 462                         s--;
 463                         fputc('3', f);
 464                         s--;
 465                         fputc('-', f);
 466                         s--;
 467                         fputc('4', f);
 468                         s--;
 469                         fputc('5', f);
 470                         s--;
 471                         fputc('6', f);
 472                         s--;
 473                         fputc('-', f);
 474                         s--;
 475                         fputc('S', f);
 476                         s--;
 477                         fputc('T', f);
 478                         s--;
 479                         fputc('D', f);
 480                         s--;
 481                         for (i = 0; i < 7; i++) {
 482                                 fputc(0, f);
 483                                 s--;
 484                         }
 485                         fputc(1, f);
 486                         s--;
 487                         fputc(0, f);
 488                         s--;
 489                         fputc(1, f);
 490                         s--;
 491                         fputc('M', f);
 492                         s--;
 493                         fputc('Q', f);
 494                         s--;
 495                         for (i = 0; i < 14; i++) {
 496                                 fputc(0xa0, f);
 497                                 s--;
 498                         }
 499                         fputc(0, f);
 500                         s--;
 501                         fputc(0xff, f);
 502                         while (s-- > (MCD_SIZE + 1))
 503                                 fputc(0, f);
 504                 } else if ((buf.st_size == MCD_SIZE + 64) || strstr(mcd, ".mem") || strstr(mcd, ".vgs")) {
 505                         s = s + 64;
 506                         fputc('V', f);
 507                         s--;
 508                         fputc('g', f);
 509                         s--;
 510                         fputc('s', f);
 511                         s--;
 512                         fputc('M', f);
 513                         s--;
 514                         for (i = 0; i < 3; i++) {
 515                                 fputc(1, f);
 516                                 s--;
 517                                 fputc(0, f);
 518                                 s--;
 519                                 fputc(0, f);
 520                                 s--;
 521                                 fputc(0, f);
 522                                 s--;
 523                         }
 524                         fputc(0, f);
 525                         s--;
 526                         fputc(2, f);
 527                         while (s-- > (MCD_SIZE + 1))
 528                                 fputc(0, f);
 529                 }
 530         }
 531         fputc('M', f);
 532         s--;
 533         fputc('C', f);
 534         s--;
 535         while (s-- > (MCD_SIZE - 127))
 536                 fputc(0, f);
 537         fputc(0xe, f);
 538         s--;
 539
 540         for (i = 0; i < 15; i++) { // 15 blocks
 541                 fputc(0xa0, f);
 542                 s--;
 543                 fputc(0x00, f);
 544                 s--;
 545                 fputc(0x00, f);
 546                 s--;
 547                 fputc(0x00, f);
 548                 s--;
 549                 fputc(0x00, f);
 550                 s--;
 551                 fputc(0x00, f);
 552                 s--;
 553                 fputc(0x00, f);
 554                 s--;
 555                 fputc(0x00, f);
 556                 s--;
 557                 fputc(0xff, f);
 558                 s--;
 559                 fputc(0xff, f);
 560                 s--;
 561                 for (j = 0; j < 117; j++) {
 562                         fputc(0x00, f);
 563                         s--;
 564                 }
 565                 fputc(0xa0, f);
 566                 s--;
 567         }
 568
 569         for (i = 0; i < 20; i++) {
 570                 fputc(0xff, f);
 571                 s--;
 572                 fputc(0xff, f);
 573                 s--;
 574                 fputc(0xff, f);
 575                 s--;
 576                 fputc(0xff, f);
 577                 s--;
 578                 fputc(0x00, f);
 579                 s--;
 580                 fputc(0x00, f);
 581                 s--;
 582                 fputc(0x00, f);
 583                 s--;
 584                 fputc(0x00, f);
 585                 s--;
 586                 fputc(0xff, f);
 587                 s--;
 588                 fputc(0xff, f);
 589                 s--;
 590                 for (j = 0; j < 118; j++) {
 591                         fputc(0x00, f);
 592                         s--;
 593                 }
 594         }
 595
 596         while ((s--) >= 0)
 597                 fputc(0, f);
 598
 599         fclose(f);
 600 }
 601
 602 void ConvertMcd(char *mcd, char *data) {
 603         FILE *f;
 604         int i = 0;
 605         int s = MCD_SIZE;
 606
 607         if (strstr(mcd, ".gme")) {
 608                 f = fopen(mcd, "wb");
 609                 if (f != NULL) {
 610                         fwrite(data - 3904, 1, MCD_SIZE + 3904, f);
 611                         fclose(f);
 612                 }
 613                 f = fopen(mcd, "r+");
 614                 s = s + 3904;
 615                 fputc('1', f); s--;
 616                 fputc('2', f); s--;
 617                 fputc('3', f); s--;
 618                 fputc('-', f); s--;
 619                 fputc('4', f); s--;
 620                 fputc('5', f); s--;
 621                 fputc('6', f); s--;
 622                 fputc('-', f); s--;
 623                 fputc('S', f); s--;
 624                 fputc('T', f); s--;
 625                 fputc('D', f); s--;
 626                 for (i = 0; i < 7; i++) {
 627                         fputc(0, f); s--;
 628                 }
 629                 fputc(1, f); s--;
 630                 fputc(0, f); s--;
 631                 fputc(1, f); s--;
 632                 fputc('M', f); s--;
 633                 fputc('Q', f); s--;
 634                 for(i=0;i<14;i++) {
 635                         fputc(0xa0, f); s--;
 636                 }
 637                 fputc(0, f); s--;
 638                 fputc(0xff, f);
 639                 while (s-- > (MCD_SIZE+1)) fputc(0, f);
 640                 fclose(f);
 641         } else if(strstr(mcd, ".mem") || strstr(mcd,".vgs")) {
 642                 f = fopen(mcd, "wb");
 643                 if (f != NULL) {
 644                         fwrite(data-64, 1, MCD_SIZE+64, f);
 645                         fclose(f);
 646                 }
 647                 f = fopen(mcd, "r+");
 648                 s = s + 64;
 649                 fputc('V', f); s--;
 650                 fputc('g', f); s--;
 651                 fputc('s', f); s--;
 652                 fputc('M', f); s--;
 653                 for(i=0;i<3;i++) {
 654                         fputc(1, f); s--;
 655                         fputc(0, f); s--;
 656                         fputc(0, f); s--;
 657                         fputc(0, f); s--;
 658                 }
 659                 fputc(0, f); s--;
 660                 fputc(2, f);
 661                 while (s-- > (MCD_SIZE+1)) fputc(0, f);
 662                 fclose(f);
 663         } else {
 664                 f = fopen(mcd, "wb");
 665                 if (f != NULL) {
 666                         fwrite(data, 1, MCD_SIZE, f);
 667                         fclose(f);
 668                 }
 669         }
 670 }
 671
 672 void GetMcdBlockInfo(int mcd, int block, McdBlock *Info) {
 673         unsigned char *data = NULL, *ptr, *str, *sstr;
 674         unsigned short clut[16];
 675         unsigned short c;
 676         int i, x;
 677
 678         memset(Info, 0, sizeof(McdBlock));
 679
 680         if (mcd == 1) data = Mcd1Data;
 681         if (mcd == 2) data = Mcd2Data;
 682
 683         ptr = data + block * 8192 + 2;
 684
 685         Info->IconCount = *ptr & 0x3;
 686
 687         ptr += 2;
 688
 689         x = 0;
 690
 691         str = Info->Title;
 692         sstr = Info->sTitle;
 693
 694         for (i = 0; i < 48; i++) {
 695                 c = *(ptr) << 8;
 696                 c |= *(ptr + 1);
 697                 if (!c) break;
 698
 699                 // Convert ASCII characters to half-width
 700                 if (c >= 0x8281 && c <= 0x829A)
 701                         c = (c - 0x8281) + 'a';
 702                 else if (c >= 0x824F && c <= 0x827A)
 703                         c = (c - 0x824F) + '0';
 704                 else if (c == 0x8140) c = ' ';
 705                 else if (c == 0x8143) c = ',';
 706                 else if (c == 0x8144) c = '.';
 707                 else if (c == 0x8146) c = ':';
 708                 else if (c == 0x8147) c = ';';
 709                 else if (c == 0x8148) c = '?';
 710                 else if (c == 0x8149) c = '!';
 711                 else if (c == 0x815E) c = '/';
 712                 else if (c == 0x8168) c = '"';
 713                 else if (c == 0x8169) c = '(';
 714                 else if (c == 0x816A) c = ')';
 715                 else if (c == 0x816D) c = '[';
 716                 else if (c == 0x816E) c = ']';
 717                 else if (c == 0x817C) c = '-';
 718                 else {
 719                         str[i] = ' ';
 720                         sstr[x++] = *ptr++; sstr[x++] = *ptr++;
 721                         continue;
 722                 }
 723
 724                 str[i] = sstr[x++] = c;
 725                 ptr += 2;
 726         }
 727
 728         trim(str);
 729         trim(sstr);
 730
 731         ptr = data + block * 8192 + 0x60; // icon palette data
 732
 733         for (i = 0; i < 16; i++) {
 734                 clut[i] = *((unsigned short *)ptr);
 735                 ptr += 2;
 736         }
 737
 738         for (i = 0; i < Info->IconCount; i++) {
 739                 short *icon = &Info->Icon[i * 16 * 16];
 740
 741                 ptr = data + block * 8192 + 128 + 128 * i; // icon data
 742
 743                 for (x = 0; x < 16 * 16; x++) {
 744                         icon[x++] = clut[*ptr & 0xf];
 745                         icon[x] = clut[*ptr >> 4];
 746                         ptr++;
 747                 }
 748         }
 749
 750         ptr = data + block * 128;
 751
 752         Info->Flags = *ptr;
 753
 754         ptr += 0xa;
 755         strncpy(Info->ID, ptr, 12);
 756         ptr += 12;
 757         strncpy(Info->Name, ptr, 16);
 758 }
 759
 760 int sioFreeze(gzFile f, int Mode) {
 761         gzfreeze(buf, sizeof(buf));
 762         gzfreeze(&StatReg, sizeof(StatReg));
 763         gzfreeze(&ModeReg, sizeof(ModeReg));
 764         gzfreeze(&CtrlReg, sizeof(CtrlReg));
 765         gzfreeze(&BaudReg, sizeof(BaudReg));
 766         gzfreeze(&bufcount, sizeof(bufcount));
 767         gzfreeze(&parp, sizeof(parp));
 768         gzfreeze(&mcdst, sizeof(mcdst));
 769         gzfreeze(&rdwr, sizeof(rdwr));
 770         gzfreeze(&adrH, sizeof(adrH));
 771         gzfreeze(&adrL, sizeof(adrL));
 772         gzfreeze(&padst, sizeof(padst));
 773
 774         return 0;
 775 }