1 /***************************************************************************
2 * Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team *
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. *
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. *
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 ***************************************************************************/
21 * Miscellaneous functions, including savestates and CD-ROM loading.
31 char CdromId[10] = "";
32 char CdromLabel[33] = "";
34 // PSX Executable types
40 #define ISODCL(from, to) (to - from + 1)
42 struct iso_directory_record {
43 char length [ISODCL (1, 1)]; /* 711 */
44 char ext_attr_length [ISODCL (2, 2)]; /* 711 */
45 char extent [ISODCL (3, 10)]; /* 733 */
46 char size [ISODCL (11, 18)]; /* 733 */
47 char date [ISODCL (19, 25)]; /* 7 by 711 */
48 char flags [ISODCL (26, 26)];
49 char file_unit_size [ISODCL (27, 27)]; /* 711 */
50 char interleave [ISODCL (28, 28)]; /* 711 */
51 char volume_sequence_number [ISODCL (29, 32)]; /* 723 */
52 unsigned char name_len [ISODCL (33, 33)]; /* 711 */
56 void mmssdd( char *b, char *p )
60 unsigned char *u = (void *)b;
61 int block = (u[3] << 24) | (u[2] << 16) | (u[1] << 8) | u[0];
62 #elif defined(__BIGENDIAN__)
63 int block = (b[0] & 0xff) | ((b[1] & 0xff) << 8) | ((b[2] & 0xff) << 16) | (b[3] << 24);
65 int block = *((int*)b);
69 m = block / 4500; // minutes
70 block = block - m * 4500; // minutes rest
71 s = block / 75; // seconds
72 d = block - s * 75; // seconds rest
74 m = ((m / 10) << 4) | m % 10;
75 s = ((s / 10) << 4) | s % 10;
76 d = ((d / 10) << 4) | d % 10;
84 time[0] = btoi(time[0]); time[1] = btoi(time[1]); time[2] = btoi(time[2]); \
89 if (time[1] == 60) { \
94 time[0] = itob(time[0]); time[1] = itob(time[1]); time[2] = itob(time[2]);
97 if (CDR_readTrack(time) == -1) return -1; \
98 buf = (void *)CDR_getBuffer(); \
99 if (buf == NULL) return -1; \
100 else CheckPPFCache((u8 *)buf, time[0], time[1], time[2]);
102 #define READDIR(_dir) \
104 memcpy(_dir, buf + 12, 2048); \
108 memcpy(_dir + 2048, buf + 12, 2048);
110 int GetCdromFile(u8 *mdir, u8 *time, char *filename) {
111 struct iso_directory_record *dir;
117 // only try to scan if a filename is given
118 if (!strlen(filename)) return -1;
122 dir = (struct iso_directory_record*) &mdir[i];
123 if (dir->length[0] == 0) {
126 i += (u8)dir->length[0];
128 if (dir->flags[0] & 0x2) { // it's a dir
129 if (!strnicmp((char *)&dir->name[0], filename, dir->name_len[0])) {
130 if (filename[dir->name_len[0]] != '\\') continue;
132 filename += dir->name_len[0] + 1;
134 mmssdd(dir->extent, (char *)time);
140 if (!strnicmp((char *)&dir->name[0], filename, strlen(filename))) {
141 mmssdd(dir->extent, (char *)time);
150 static const unsigned int gpu_ctl_def[] = {
151 0x00000000, 0x01000000, 0x03000000, 0x04000000,
152 0x05000800, 0x06c60260, 0x0703fc10, 0x08000027,
155 static const unsigned int gpu_data_def[] = {
156 0xe100360b, 0xe2000000, 0xe3000800, 0xe4077e7f,
157 0xe5001000, 0xe6000000,
158 0x02000000, 0x00000000, 0x01ff03ff,
161 static void fake_bios_gpu_setup(void)
165 for (i = 0; i < sizeof(gpu_ctl_def) / sizeof(gpu_ctl_def[0]); i++)
166 GPU_writeStatus(gpu_ctl_def[i]);
168 for (i = 0; i < sizeof(gpu_data_def) / sizeof(gpu_data_def[0]); i++)
169 GPU_writeData(gpu_data_def[i]);
174 struct iso_directory_record *dir;
179 // not the best place to do it, but since BIOS boot logo killer
180 // is just below, do it here
181 fake_bios_gpu_setup();
183 if (!Config.HLE && !Config.SlowBoot) {
185 psxRegs.pc = psxRegs.GPR.n.ra;
189 time[0] = itob(0); time[1] = itob(2); time[2] = itob(0x10);
193 // skip head and sub, and go to the root directory record
194 dir = (struct iso_directory_record*) &buf[12+156];
196 mmssdd(dir->extent, (char*)time);
200 // Load SYSTEM.CNF and scan for the main executable
201 if (GetCdromFile(mdir, time, "SYSTEM.CNF;1") == -1) {
202 // if SYSTEM.CNF is missing, start an existing PSX.EXE
203 if (GetCdromFile(mdir, time, "PSX.EXE;1") == -1) return -1;
208 // read the SYSTEM.CNF
211 sscanf((char *)buf + 12, "BOOT = cdrom:\\%255s", exename);
212 if (GetCdromFile(mdir, time, exename) == -1) {
213 sscanf((char *)buf + 12, "BOOT = cdrom:%255s", exename);
214 if (GetCdromFile(mdir, time, exename) == -1) {
215 char *ptr = strstr((char *)buf + 12, "cdrom:");
218 while (*ptr == '\\' || *ptr == '/') ptr++;
219 strncpy(exename, ptr, 255);
222 while (*ptr != '\0' && *ptr != '\r' && *ptr != '\n') ptr++;
224 if (GetCdromFile(mdir, time, exename) == -1)
231 // Read the EXE-Header
235 memcpy(&tmpHead, buf + 12, sizeof(EXE_HEADER));
237 psxRegs.pc = SWAP32(tmpHead.pc0);
238 psxRegs.GPR.n.gp = SWAP32(tmpHead.gp0);
239 psxRegs.GPR.n.sp = SWAP32(tmpHead.s_addr);
240 if (psxRegs.GPR.n.sp == 0) psxRegs.GPR.n.sp = 0x801fff00;
242 tmpHead.t_size = SWAP32(tmpHead.t_size);
243 tmpHead.t_addr = SWAP32(tmpHead.t_addr);
245 psxCpu->Clear(tmpHead.t_addr, tmpHead.t_size / 4);
247 // Read the rest of the main executable
248 while (tmpHead.t_size & ~2047) {
249 void *ptr = (void *)PSXM(tmpHead.t_addr);
254 if (ptr != NULL) memcpy(ptr, buf+12, 2048);
256 tmpHead.t_size -= 2048;
257 tmpHead.t_addr += 2048;
263 int LoadCdromFile(const char *filename, EXE_HEADER *head) {
264 struct iso_directory_record *dir;
271 sscanf(filename, "cdrom:\\%255s", exename);
273 time[0] = itob(0); time[1] = itob(2); time[2] = itob(0x10);
277 // skip head and sub, and go to the root directory record
278 dir = (struct iso_directory_record *)&buf[12 + 156];
280 mmssdd(dir->extent, (char*)time);
284 if (GetCdromFile(mdir, time, exename) == -1) return -1;
288 memcpy(head, buf + 12, sizeof(EXE_HEADER));
292 psxCpu->Clear(addr, size / 4);
294 while (size & ~2047) {
300 memcpy(mem, buf + 12, 2048);
310 struct iso_directory_record *dir;
311 unsigned char time[4];
313 unsigned char mdir[4096];
321 time[2] = itob(0x10);
325 memset(CdromLabel, 0, sizeof(CdromLabel));
326 memset(CdromId, 0, sizeof(CdromId));
327 memset(exename, 0, sizeof(exename));
329 strncpy(CdromLabel, buf + 52, 32);
331 // skip head and sub, and go to the root directory record
332 dir = (struct iso_directory_record *)&buf[12 + 156];
334 mmssdd(dir->extent, (char *)time);
338 if (GetCdromFile(mdir, time, "SYSTEM.CNF;1") != -1) {
341 sscanf(buf + 12, "BOOT = cdrom:\\%255s", exename);
342 if (GetCdromFile(mdir, time, exename) == -1) {
343 sscanf(buf + 12, "BOOT = cdrom:%255s", exename);
344 if (GetCdromFile(mdir, time, exename) == -1) {
345 char *ptr = strstr(buf + 12, "cdrom:"); // possibly the executable is in some subdir
348 while (*ptr == '\\' || *ptr == '/') ptr++;
349 strncpy(exename, ptr, 255);
352 while (*ptr != '\0' && *ptr != '\r' && *ptr != '\n') ptr++;
354 if (GetCdromFile(mdir, time, exename) == -1)
355 return -1; // main executable not found
360 /* Workaround for Wild Arms EU/US which has non-standard string causing incorrect region detection */
361 if (exename[0] == 'E' && exename[1] == 'X' && exename[2] == 'E' && exename[3] == '\\') {
363 size_t i, len = strlen(exename) - offset;
364 for (i = 0; i < len; i++)
365 exename[i] = exename[i + offset];
368 } else if (GetCdromFile(mdir, time, "PSX.EXE;1") != -1) {
369 strcpy(exename, "PSX.EXE;1");
370 strcpy(CdromId, "SLUS99999");
372 return -1; // SYSTEM.CNF and PSX.EXE not found
374 if (CdromId[0] == '\0') {
375 len = strlen(exename);
377 for (i = 0; i < len; ++i) {
378 if (exename[i] == ';' || c >= sizeof(CdromId) - 1)
380 if (isalnum(exename[i]))
381 CdromId[c++] = exename[i];
385 if (CdromId[0] == '\0')
386 strcpy(CdromId, "SLUS99999");
388 if (Config.PsxAuto) { // autodetect system (pal or ntsc)
389 if (CdromId[2] == 'e' || CdromId[2] == 'E')
390 Config.PsxType = PSX_TYPE_PAL; // pal
391 else Config.PsxType = PSX_TYPE_NTSC; // ntsc
394 if (CdromLabel[0] == ' ') {
395 strncpy(CdromLabel, CdromId, 9);
397 SysPrintf(_("CD-ROM Label: %.32s\n"), CdromLabel);
398 SysPrintf(_("CD-ROM ID: %.9s\n"), CdromId);
399 SysPrintf(_("CD-ROM EXE Name: %.255s\n"), exename);
406 static int PSXGetFileType(FILE *f) {
407 unsigned long current;
413 fseek(f, 0L, SEEK_SET);
414 fread(mybuf, 2048, 1, f);
415 fseek(f, current, SEEK_SET);
417 exe_hdr = (EXE_HEADER *)mybuf;
418 if (memcmp(exe_hdr->id, "PS-X EXE", 8) == 0)
421 if (mybuf[0] == 'C' && mybuf[1] == 'P' && mybuf[2] == 'E')
424 coff_hdr = (FILHDR *)mybuf;
425 if (SWAPu16(coff_hdr->f_magic) == 0x0162)
431 // temporary pandora workaround..
433 size_t fread_to_ram(void *ptr, size_t size, size_t nmemb, FILE *stream)
438 tmp = malloc(size * nmemb);
440 ret = fread(tmp, size, nmemb, stream);
441 memcpy(ptr, tmp, size * nmemb);
447 int Load(const char *ExePath) {
453 u32 section_address, section_size;
456 strcpy(CdromId, "SLUS99999");
457 strcpy(CdromLabel, "SLUS_999.99");
459 tmpFile = fopen(ExePath, "rb");
460 if (tmpFile == NULL) {
461 SysPrintf(_("Error opening file: %s.\n"), ExePath);
464 type = PSXGetFileType(tmpFile);
467 fread(&tmpHead,sizeof(EXE_HEADER),1,tmpFile);
468 section_address = SWAP32(tmpHead.t_addr);
469 section_size = SWAP32(tmpHead.t_size);
470 mem = PSXM(section_address);
472 fseek(tmpFile, 0x800, SEEK_SET);
473 fread_to_ram(mem, section_size, 1, tmpFile);
474 psxCpu->Clear(section_address, section_size / 4);
477 psxRegs.pc = SWAP32(tmpHead.pc0);
478 psxRegs.GPR.n.gp = SWAP32(tmpHead.gp0);
479 psxRegs.GPR.n.sp = SWAP32(tmpHead.s_addr);
480 if (psxRegs.GPR.n.sp == 0)
481 psxRegs.GPR.n.sp = 0x801fff00;
485 fseek(tmpFile, 6, SEEK_SET); /* Something tells me we should go to 4 and read the "08 00" here... */
487 fread(&opcode, 1, 1, tmpFile);
489 case 1: /* Section loading */
490 fread(§ion_address, 4, 1, tmpFile);
491 fread(§ion_size, 4, 1, tmpFile);
492 section_address = SWAPu32(section_address);
493 section_size = SWAPu32(section_size);
495 EMU_LOG("Loading %08X bytes from %08X to %08X\n", section_size, ftell(tmpFile), section_address);
497 mem = PSXM(section_address);
499 fread_to_ram(mem, section_size, 1, tmpFile);
500 psxCpu->Clear(section_address, section_size / 4);
503 case 3: /* register loading (PC only?) */
504 fseek(tmpFile, 2, SEEK_CUR); /* unknown field */
505 fread(&psxRegs.pc, 4, 1, tmpFile);
506 psxRegs.pc = SWAPu32(psxRegs.pc);
508 case 0: /* End of file */
511 SysPrintf(_("Unknown CPE opcode %02x at position %08x.\n"), opcode, ftell(tmpFile) - 1);
515 } while (opcode != 0 && retval == 0);
518 SysPrintf(_("COFF files not supported.\n"));
522 SysPrintf(_("This file does not appear to be a valid PSX EXE file.\n"));
523 SysPrintf(_("(did you forget -cdfile ?)\n"));
531 CdromLabel[0] = '\0';
539 static void *zlib_open(const char *name, const char *mode)
541 return gzopen(name, mode);
544 static int zlib_read(void *file, void *buf, u32 len)
546 return gzread(file, buf, len);
549 static int zlib_write(void *file, const void *buf, u32 len)
551 return gzwrite(file, buf, len);
554 static long zlib_seek(void *file, long offs, int whence)
556 return gzseek(file, offs, whence);
559 static void zlib_close(void *file)
564 struct PcsxSaveFuncs SaveFuncs = {
565 zlib_open, zlib_read, zlib_write, zlib_seek, zlib_close
568 static const char PcsxHeader[32] = "STv4 PCSX v" PCSX_VERSION;
570 // Savestate Versioning!
571 // If you make changes to the savestate version, please increment the value below.
572 static const u32 SaveVersion = 0x8b410006;
574 int SaveState(const char *file) {
581 f = SaveFuncs.open(file, "wb");
582 if (f == NULL) return -1;
584 new_dyna_before_save();
586 SaveFuncs.write(f, (void *)PcsxHeader, 32);
587 SaveFuncs.write(f, (void *)&SaveVersion, sizeof(u32));
588 SaveFuncs.write(f, (void *)&Config.HLE, sizeof(boolean));
590 pMem = (unsigned char *)malloc(128 * 96 * 3);
591 if (pMem == NULL) return -1;
592 GPU_getScreenPic(pMem);
593 SaveFuncs.write(f, pMem, 128 * 96 * 3);
599 SaveFuncs.write(f, psxM, 0x00200000);
600 SaveFuncs.write(f, psxR, 0x00080000);
601 SaveFuncs.write(f, psxH, 0x00010000);
602 SaveFuncs.write(f, (void *)&psxRegs, sizeof(psxRegs));
605 gpufP = (GPUFreeze_t *)malloc(sizeof(GPUFreeze_t));
606 gpufP->ulFreezeVersion = 1;
607 GPU_freeze(1, gpufP);
608 SaveFuncs.write(f, gpufP, sizeof(GPUFreeze_t));
612 spufP = (SPUFreeze_t *) malloc(16);
613 SPU_freeze(2, spufP, psxRegs.cycle);
614 Size = spufP->Size; SaveFuncs.write(f, &Size, 4);
616 spufP = (SPUFreeze_t *) malloc(Size);
617 SPU_freeze(1, spufP, psxRegs.cycle);
618 SaveFuncs.write(f, spufP, Size);
626 new_dyna_freeze(f, 1);
630 new_dyna_after_save();
635 int LoadState(const char *file) {
644 f = SaveFuncs.open(file, "rb");
645 if (f == NULL) return -1;
647 SaveFuncs.read(f, header, sizeof(header));
648 SaveFuncs.read(f, &version, sizeof(u32));
649 SaveFuncs.read(f, &hle, sizeof(boolean));
651 if (strncmp("STv4 PCSX", header, 9) != 0 || version != SaveVersion) {
661 SaveFuncs.seek(f, 128 * 96 * 3, SEEK_CUR);
663 SaveFuncs.read(f, psxM, 0x00200000);
664 SaveFuncs.read(f, psxR, 0x00080000);
665 SaveFuncs.read(f, psxH, 0x00010000);
666 SaveFuncs.read(f, (void *)&psxRegs, sizeof(psxRegs));
672 gpufP = (GPUFreeze_t *)malloc(sizeof(GPUFreeze_t));
673 SaveFuncs.read(f, gpufP, sizeof(GPUFreeze_t));
674 GPU_freeze(0, gpufP);
676 if (HW_GPU_STATUS == 0)
677 HW_GPU_STATUS = GPU_readStatus();
680 SaveFuncs.read(f, &Size, 4);
681 spufP = (SPUFreeze_t *)malloc(Size);
682 SaveFuncs.read(f, spufP, Size);
683 SPU_freeze(0, spufP, psxRegs.cycle);
691 new_dyna_freeze(f, 0);
698 int CheckState(const char *file) {
704 f = SaveFuncs.open(file, "rb");
705 if (f == NULL) return -1;
707 SaveFuncs.read(f, header, sizeof(header));
708 SaveFuncs.read(f, &version, sizeof(u32));
709 SaveFuncs.read(f, &hle, sizeof(boolean));
713 if (strncmp("STv4 PCSX", header, 9) != 0 || version != SaveVersion)
719 // NET Function Helpers
722 if (NET_recvData == NULL || NET_sendData == NULL)
725 NET_sendData(&Config.Xa, sizeof(Config.Xa), PSE_NET_BLOCKING);
726 NET_sendData(&Config.Sio, sizeof(Config.Sio), PSE_NET_BLOCKING);
727 NET_sendData(&Config.SpuIrq, sizeof(Config.SpuIrq), PSE_NET_BLOCKING);
728 NET_sendData(&Config.RCntFix, sizeof(Config.RCntFix), PSE_NET_BLOCKING);
729 NET_sendData(&Config.PsxType, sizeof(Config.PsxType), PSE_NET_BLOCKING);
730 NET_sendData(&Config.Cpu, sizeof(Config.Cpu), PSE_NET_BLOCKING);
738 if (NET_recvData == NULL || NET_sendData == NULL)
741 NET_recvData(&Config.Xa, sizeof(Config.Xa), PSE_NET_BLOCKING);
742 NET_recvData(&Config.Sio, sizeof(Config.Sio), PSE_NET_BLOCKING);
743 NET_recvData(&Config.SpuIrq, sizeof(Config.SpuIrq), PSE_NET_BLOCKING);
744 NET_recvData(&Config.RCntFix, sizeof(Config.RCntFix), PSE_NET_BLOCKING);
745 NET_recvData(&Config.PsxType, sizeof(Config.PsxType), PSE_NET_BLOCKING);
750 NET_recvData(&Config.Cpu, sizeof(Config.Cpu), PSE_NET_BLOCKING);
751 if (tmp != Config.Cpu) {
754 if (Config.Cpu == CPU_INTERPRETER) psxCpu = &psxInt;
755 else psxCpu = &psxRec;
759 if (psxCpu->Init() == -1) {
760 SysClose(); return -1;
768 // remove the leading and trailing spaces in a string
769 void trim(char *str) {
773 // skip leading blanks
774 while (str[pos] <= ' ' && str[pos] > 0)
778 *(dest++) = str[pos];
782 *(dest--) = '\0'; // store the null
784 // remove trailing blanks
785 while (dest >= str && *dest <= ' ' && *dest > 0)
789 // lookup table for crc calculation
790 static unsigned short crctab[256] = {
791 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7, 0x8108,
792 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, 0x1231, 0x0210,
793 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6, 0x9339, 0x8318, 0xB37B,
794 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE, 0x2462, 0x3443, 0x0420, 0x1401,
795 0x64E6, 0x74C7, 0x44A4, 0x5485, 0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE,
796 0xF5CF, 0xC5AC, 0xD58D, 0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6,
797 0x5695, 0x46B4, 0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D,
798 0xC7BC, 0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
799 0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B, 0x5AF5,
800 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12, 0xDBFD, 0xCBDC,
801 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A, 0x6CA6, 0x7C87, 0x4CE4,
802 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41, 0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD,
803 0xAD2A, 0xBD0B, 0x8D68, 0x9D49, 0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13,
804 0x2E32, 0x1E51, 0x0E70, 0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A,
805 0x9F59, 0x8F78, 0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E,
806 0xE16F, 0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
807 0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E, 0x02B1,
808 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256, 0xB5EA, 0xA5CB,
809 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D, 0x34E2, 0x24C3, 0x14A0,
810 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, 0xA7DB, 0xB7FA, 0x8799, 0x97B8,
811 0xE75F, 0xF77E, 0xC71D, 0xD73C, 0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657,
812 0x7676, 0x4615, 0x5634, 0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9,
813 0xB98A, 0xA9AB, 0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882,
814 0x28A3, 0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
815 0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92, 0xFD2E,
816 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9, 0x7C26, 0x6C07,
817 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1, 0xEF1F, 0xFF3E, 0xCF5D,
818 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8, 0x6E17, 0x7E36, 0x4E55, 0x5E74,
819 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
822 u16 calcCrc(u8 *d, int len) {
826 for (i = 0; i < len; i++) {
827 crc = crctab[(crc >> 8) ^ d[i]] ^ (crc << 8);