| 1 | //\r |
| 2 | // Jaguar EEPROM handler\r |
| 3 | //\r |
| 4 | // by Cal2\r |
| 5 | // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)\r |
| 6 | // Cleanups/enhancements by James Hammons\r |
| 7 | // (C) 2010 Underground Software\r |
| 8 | //\r |
| 9 | // JLH = James Hammons <jlhamm@acm.org>\r |
| 10 | // JPM = Jean-Paul Mari <djipi.mari@gmail.com>\r |
| 11 | //\r |
| 12 | // Who When (MM/DD/YY) What\r |
| 13 | // --- --------------- ------------------------------------------------------------\r |
| 14 | // JLH 01/16/2010 Created this log ;-)\r |
| 15 | // JPM 10/11/2017 EEPROM directory detection and creation if missing\r |
| 16 | // JPM 11/18/2020 EEPROM directory creation allowed only for Windows\r |
| 17 | //\r |
| 18 | \r |
| 19 | #include "eeprom.h"\r |
| 20 | #if _WIN32 || _WIN64\r |
| 21 | #include <direct.h>\r |
| 22 | #else\r |
| 23 | #define _mkdir(dir) 1\r |
| 24 | #endif\r |
| 25 | #include <stdlib.h>\r |
| 26 | #include <string.h> // For memset\r |
| 27 | #include "jaguar.h"\r |
| 28 | #include "log.h"\r |
| 29 | #include "settings.h"\r |
| 30 | \r |
| 31 | #define eeprom_LOG\r |
| 32 | \r |
| 33 | static uint16_t eeprom_ram[64];\r |
| 34 | static uint16_t cdromEEPROM[64];\r |
| 35 | \r |
| 36 | //\r |
| 37 | // Private function prototypes\r |
| 38 | //\r |
| 39 | \r |
| 40 | static void EEPROMSave(void);\r |
| 41 | static void eeprom_set_di(uint32_t state);\r |
| 42 | static void eeprom_set_cs(uint32_t state);\r |
| 43 | static uint32_t eeprom_get_do(void);\r |
| 44 | void ReadEEPROMFromFile(FILE * file, uint16_t * ram);\r |
| 45 | void WriteEEPROMToFile(FILE * file, uint16_t * ram);\r |
| 46 | \r |
| 47 | \r |
| 48 | enum { EE_STATE_START = 1, EE_STATE_OP_A, EE_STATE_OP_B, EE_STATE_0, EE_STATE_1,\r |
| 49 | EE_STATE_2, EE_STATE_3, EE_STATE_0_0, EE_READ_ADDRESS, EE_STATE_0_0_0,\r |
| 50 | EE_STATE_0_0_1, EE_STATE_0_0_2, EE_STATE_0_0_3, EE_STATE_0_0_1_0, EE_READ_DATA,\r |
| 51 | EE_STATE_BUSY, EE_STATE_1_0, EE_STATE_1_1, EE_STATE_2_0, EE_STATE_3_0 };\r |
| 52 | \r |
| 53 | // Local global variables\r |
| 54 | \r |
| 55 | static uint16_t jerry_ee_state = EE_STATE_START;\r |
| 56 | static uint16_t jerry_ee_op = 0;\r |
| 57 | static uint16_t jerry_ee_rstate = 0;\r |
| 58 | static uint16_t jerry_ee_address_data = 0;\r |
| 59 | static uint16_t jerry_ee_address_cnt = 6;\r |
| 60 | static uint16_t jerry_ee_data = 0;\r |
| 61 | static uint16_t jerry_ee_data_cnt = 16;\r |
| 62 | static uint16_t jerry_writes_enabled = 0;\r |
| 63 | static uint16_t jerry_ee_direct_jump = 0;\r |
| 64 | \r |
| 65 | static char eeprom_filename[MAX_PATH];\r |
| 66 | static char cdromEEPROMFilename[MAX_PATH];\r |
| 67 | static bool haveEEPROM = false;\r |
| 68 | static bool haveCDROMEEPROM = false;\r |
| 69 | \r |
| 70 | \r |
| 71 | // EEPROM initialisations\r |
| 72 | void EepromInit(void)\r |
| 73 | {\r |
| 74 | FILE * fp;\r |
| 75 | \r |
| 76 | // No need for EEPROM for the Memory Track device :-P\r |
| 77 | if (jaguarMainROMCRC32 == 0xFDF37F47)\r |
| 78 | {\r |
| 79 | WriteLog("EEPROM: Memory Track device detected...\n");\r |
| 80 | }\r |
| 81 | else\r |
| 82 | {\r |
| 83 | // Handle regular cartridge EEPROM\r |
| 84 | sprintf(eeprom_filename, "%s%08X.eeprom", vjs.EEPROMPath, (unsigned int)jaguarMainROMCRC32);\r |
| 85 | fp = fopen(eeprom_filename, "rb");\r |
| 86 | \r |
| 87 | if (fp)\r |
| 88 | {\r |
| 89 | ReadEEPROMFromFile(fp, eeprom_ram);\r |
| 90 | fclose(fp);\r |
| 91 | WriteLog("EEPROM: Loaded from %s\n", eeprom_filename);\r |
| 92 | haveEEPROM = true;\r |
| 93 | }\r |
| 94 | else\r |
| 95 | {\r |
| 96 | WriteLog("EEPROM: Could not open file \"%s\"!\n", eeprom_filename);\r |
| 97 | }\r |
| 98 | \r |
| 99 | // Handle JagCD EEPROM\r |
| 100 | sprintf(cdromEEPROMFilename, "%scdrom.eeprom", vjs.EEPROMPath);\r |
| 101 | fp = fopen(cdromEEPROMFilename, "rb");\r |
| 102 | \r |
| 103 | if (fp)\r |
| 104 | {\r |
| 105 | ReadEEPROMFromFile(fp, cdromEEPROM);\r |
| 106 | fclose(fp);\r |
| 107 | WriteLog("EEPROM: Loaded from cdrom.eeprom\n");\r |
| 108 | haveCDROMEEPROM = true;\r |
| 109 | }\r |
| 110 | else\r |
| 111 | {\r |
| 112 | WriteLog("EEPROM: Could not open file \"%s\"!\n", cdromEEPROMFilename);\r |
| 113 | }\r |
| 114 | }\r |
| 115 | }\r |
| 116 | \r |
| 117 | \r |
| 118 | // EEPROM reset\r |
| 119 | void EepromReset(void)\r |
| 120 | {\r |
| 121 | if (!haveEEPROM)\r |
| 122 | {\r |
| 123 | memset(eeprom_ram, 0xFF, 64 * sizeof(uint16_t));\r |
| 124 | }\r |
| 125 | \r |
| 126 | if (!haveCDROMEEPROM)\r |
| 127 | {\r |
| 128 | memset(cdromEEPROM, 0xFF, 64 * sizeof(uint16_t));\r |
| 129 | }\r |
| 130 | }\r |
| 131 | \r |
| 132 | \r |
| 133 | //\r |
| 134 | void EepromDone(void)\r |
| 135 | {\r |
| 136 | WriteLog("EEPROM: Done.\n");\r |
| 137 | }\r |
| 138 | \r |
| 139 | \r |
| 140 | // EEPROM save\r |
| 141 | static void EEPROMSave(void)\r |
| 142 | {\r |
| 143 | FILE * fp;\r |
| 144 | \r |
| 145 | // Check if EEPROM directory exists and try to create it if not\r |
| 146 | if (_mkdir(vjs.EEPROMPath))\r |
| 147 | {\r |
| 148 | WriteLog("EEPROM: Could not create directory \"%s!\"\n", vjs.EEPROMPath);\r |
| 149 | }\r |
| 150 | \r |
| 151 | // Write out regular cartridge EEPROM data\r |
| 152 | fp = fopen(eeprom_filename, "wb");\r |
| 153 | if (fp)\r |
| 154 | {\r |
| 155 | WriteEEPROMToFile(fp, eeprom_ram);\r |
| 156 | fclose(fp);\r |
| 157 | }\r |
| 158 | else\r |
| 159 | {\r |
| 160 | WriteLog("EEPROM: Could not create file \"%s!\"\n", eeprom_filename);\r |
| 161 | }\r |
| 162 | \r |
| 163 | // Write out JagCD EEPROM data\r |
| 164 | fp = fopen(cdromEEPROMFilename, "wb");\r |
| 165 | if (fp)\r |
| 166 | {\r |
| 167 | WriteEEPROMToFile(fp, cdromEEPROM);\r |
| 168 | fclose(fp);\r |
| 169 | }\r |
| 170 | else\r |
| 171 | {\r |
| 172 | WriteLog("EEPROM: Could not create file \"%s!\"\n", cdromEEPROMFilename);\r |
| 173 | }\r |
| 174 | }\r |
| 175 | \r |
| 176 | \r |
| 177 | //\r |
| 178 | // Read/write EEPROM files to disk in an endian safe manner\r |
| 179 | //\r |
| 180 | void ReadEEPROMFromFile(FILE * file, uint16_t * ram)\r |
| 181 | {\r |
| 182 | uint8_t buffer[128];\r |
| 183 | size_t ignored = fread(buffer, 1, 128, file);\r |
| 184 | \r |
| 185 | for (int i = 0; i < 64; i++)\r |
| 186 | {\r |
| 187 | ram[i] = (buffer[(i * 2) + 0] << 8) | buffer[(i * 2) + 1];\r |
| 188 | }\r |
| 189 | }\r |
| 190 | \r |
| 191 | \r |
| 192 | void WriteEEPROMToFile(FILE * file, uint16_t * ram)\r |
| 193 | {\r |
| 194 | uint8_t buffer[128];\r |
| 195 | \r |
| 196 | for(int i=0; i<64; i++)\r |
| 197 | {\r |
| 198 | buffer[(i * 2) + 0] = ram[i] >> 8;\r |
| 199 | buffer[(i * 2) + 1] = ram[i] & 0xFF;\r |
| 200 | }\r |
| 201 | \r |
| 202 | fwrite(buffer, 1, 128, file);\r |
| 203 | }\r |
| 204 | \r |
| 205 | \r |
| 206 | uint8_t EepromReadByte(uint32_t offset)\r |
| 207 | {\r |
| 208 | switch (offset)\r |
| 209 | {\r |
| 210 | case 0xF14001:\r |
| 211 | return eeprom_get_do();\r |
| 212 | case 0xF14801:\r |
| 213 | break;\r |
| 214 | case 0xF15001:\r |
| 215 | eeprom_set_cs(1);\r |
| 216 | break;\r |
| 217 | default:\r |
| 218 | #ifdef eeprom_LOG\r |
| 219 | WriteLog("EEPROM: unmapped 0x%.8x\n", offset);\r |
| 220 | #endif\r |
| 221 | break;\r |
| 222 | }\r |
| 223 | \r |
| 224 | return 0x00;\r |
| 225 | }\r |
| 226 | \r |
| 227 | \r |
| 228 | uint16_t EepromReadWord(uint32_t offset)\r |
| 229 | {\r |
| 230 | return ((uint16_t)EepromReadByte(offset + 0) << 8) | EepromReadByte(offset + 1);\r |
| 231 | }\r |
| 232 | \r |
| 233 | \r |
| 234 | void EepromWriteByte(uint32_t offset, uint8_t data)\r |
| 235 | {\r |
| 236 | switch (offset)\r |
| 237 | {\r |
| 238 | case 0xF14001:\r |
| 239 | break;\r |
| 240 | case 0xF14801:\r |
| 241 | eeprom_set_di(data & 0x01);\r |
| 242 | break;\r |
| 243 | case 0xF15001:\r |
| 244 | eeprom_set_cs(1);\r |
| 245 | break;\r |
| 246 | default:\r |
| 247 | #ifdef eeprom_LOG\r |
| 248 | WriteLog("eeprom: unmapped 0x%.8x\n",offset);\r |
| 249 | #endif\r |
| 250 | break;\r |
| 251 | }\r |
| 252 | }\r |
| 253 | \r |
| 254 | \r |
| 255 | void EepromWriteWord(uint32_t offset, uint16_t data)\r |
| 256 | {\r |
| 257 | EepromWriteByte(offset + 0, (data >> 8) & 0xFF);\r |
| 258 | EepromWriteByte(offset + 1, data & 0xFF);\r |
| 259 | }\r |
| 260 | \r |
| 261 | \r |
| 262 | /*\r |
| 263 | ;\r |
| 264 | ; Commands specific to the National Semiconductor NM93C14\r |
| 265 | ;\r |
| 266 | ;\r |
| 267 | ; 9-bit commands..\r |
| 268 | ; 876543210\r |
| 269 | eEWDS equ %100000000 ;Erase/Write disable (default)\r |
| 270 | eWRAL equ %100010000 ;Writes all registers\r |
| 271 | eERAL equ %100100000 ;Erase all registers\r |
| 272 | eEWEN equ %100110000 ;Erase/write Enable\r |
| 273 | eWRITE equ %101000000 ;Write selected register\r |
| 274 | eREAD equ %110000000 ;read from EEPROM\r |
| 275 | eERASE equ %111000000 ;Erase selected register\r |
| 276 | */\r |
| 277 | \r |
| 278 | \r |
| 279 | static void eeprom_set_di(uint32_t data)\r |
| 280 | {\r |
| 281 | #ifdef eeprom_LOG\r |
| 282 | WriteLog("eeprom: di=%i\n",data);\r |
| 283 | WriteLog("eeprom: state %i\n",jerry_ee_state);\r |
| 284 | #endif\r |
| 285 | \r |
| 286 | switch (jerry_ee_state)\r |
| 287 | {\r |
| 288 | case EE_STATE_START:\r |
| 289 | jerry_ee_state = EE_STATE_OP_A;\r |
| 290 | break;\r |
| 291 | case EE_STATE_OP_A:\r |
| 292 | jerry_ee_op = (data << 1);\r |
| 293 | jerry_ee_state = EE_STATE_OP_B;\r |
| 294 | break;\r |
| 295 | case EE_STATE_OP_B:\r |
| 296 | jerry_ee_op |= data;\r |
| 297 | jerry_ee_direct_jump = 0;\r |
| 298 | #ifdef eeprom_LOG\r |
| 299 | WriteLog("eeprom: opcode %i\n",jerry_ee_op);\r |
| 300 | #endif\r |
| 301 | \r |
| 302 | switch (jerry_ee_op)\r |
| 303 | {\r |
| 304 | // Opcode 00: eEWEN, eERAL, eWRAL, eEWNDS\r |
| 305 | case 0: jerry_ee_state = EE_STATE_0; break;\r |
| 306 | // Opcode 01: eWRITE (Write selected register)\r |
| 307 | case 1: jerry_ee_state = EE_STATE_1; break;\r |
| 308 | // Opcode 10: eREAD (Read from EEPROM)\r |
| 309 | case 2: jerry_ee_state = EE_STATE_2; break;\r |
| 310 | // Opcode 11: eERASE (Erase selected register)\r |
| 311 | case 3: jerry_ee_state = EE_STATE_3; break;\r |
| 312 | }\r |
| 313 | \r |
| 314 | eeprom_set_di(data);\r |
| 315 | break;\r |
| 316 | case EE_STATE_0:\r |
| 317 | jerry_ee_rstate = EE_STATE_0_0;\r |
| 318 | jerry_ee_state = EE_READ_ADDRESS;\r |
| 319 | jerry_ee_direct_jump = 1;\r |
| 320 | jerry_ee_address_cnt = 6;\r |
| 321 | jerry_ee_address_data = 0;\r |
| 322 | break;\r |
| 323 | case EE_STATE_0_0:\r |
| 324 | switch ((jerry_ee_address_data >> 4) & 0x03)\r |
| 325 | {\r |
| 326 | // Opcode 00 00: eEWDS (Erase/Write disable)\r |
| 327 | case 0: jerry_ee_state=EE_STATE_0_0_0; break;\r |
| 328 | // Opcode 00 01: eWRAL (Write all registers)\r |
| 329 | case 1: jerry_ee_state=EE_STATE_0_0_1; break;\r |
| 330 | // Opcode 00 10: eERAL (Erase all registers)\r |
| 331 | case 2: jerry_ee_state=EE_STATE_0_0_2; break;\r |
| 332 | // Opcode 00 11: eEWEN (Erase/Write enable)\r |
| 333 | case 3: jerry_ee_state=EE_STATE_0_0_3; break;\r |
| 334 | }\r |
| 335 | \r |
| 336 | eeprom_set_di(data);\r |
| 337 | break;\r |
| 338 | case EE_STATE_0_0_0:\r |
| 339 | // writes disable\r |
| 340 | #ifdef eeprom_LOG\r |
| 341 | WriteLog("eeprom: read only\n");\r |
| 342 | #endif\r |
| 343 | jerry_writes_enabled = 0;\r |
| 344 | jerry_ee_state = EE_STATE_START;\r |
| 345 | break;\r |
| 346 | case EE_STATE_0_0_1:\r |
| 347 | // writes all\r |
| 348 | jerry_ee_rstate = EE_STATE_0_0_1_0;\r |
| 349 | jerry_ee_state = EE_READ_DATA;\r |
| 350 | jerry_ee_data_cnt = 16;\r |
| 351 | jerry_ee_data = 0;\r |
| 352 | jerry_ee_direct_jump = 1;\r |
| 353 | break;\r |
| 354 | case EE_STATE_0_0_1_0:\r |
| 355 | #ifdef eeprom_LOG\r |
| 356 | WriteLog("eeprom: filling eeprom with 0x%.4x\n",data);\r |
| 357 | #endif\r |
| 358 | if (jerry_writes_enabled)\r |
| 359 | {\r |
| 360 | for(int i=0; i<64; i++)\r |
| 361 | eeprom_ram[i] = jerry_ee_data;\r |
| 362 | \r |
| 363 | EEPROMSave(); // Save it NOW!\r |
| 364 | }\r |
| 365 | \r |
| 366 | //else\r |
| 367 | #ifdef eeprom_LOG\r |
| 368 | WriteLog("eeprom: not writing because read only\n");\r |
| 369 | #endif\r |
| 370 | jerry_ee_state = EE_STATE_BUSY;\r |
| 371 | break;\r |
| 372 | case EE_STATE_0_0_2:\r |
| 373 | // erase all\r |
| 374 | #ifdef eeprom_LOG\r |
| 375 | WriteLog("eeprom: erasing eeprom\n");\r |
| 376 | #endif\r |
| 377 | if (jerry_writes_enabled)\r |
| 378 | for(int i=0; i<64; i++)\r |
| 379 | eeprom_ram[i] = 0xFFFF;\r |
| 380 | \r |
| 381 | jerry_ee_state = EE_STATE_BUSY;\r |
| 382 | break;\r |
| 383 | case EE_STATE_0_0_3:\r |
| 384 | // writes enable\r |
| 385 | #ifdef eeprom_LOG\r |
| 386 | WriteLog("eeprom: read/write\n");\r |
| 387 | #endif\r |
| 388 | jerry_writes_enabled = 1;\r |
| 389 | jerry_ee_state = EE_STATE_START;\r |
| 390 | break;\r |
| 391 | case EE_STATE_1:\r |
| 392 | jerry_ee_rstate = EE_STATE_1_0;\r |
| 393 | jerry_ee_state = EE_READ_ADDRESS;\r |
| 394 | jerry_ee_address_cnt = 6;\r |
| 395 | jerry_ee_address_data = 0;\r |
| 396 | jerry_ee_direct_jump = 1;\r |
| 397 | break;\r |
| 398 | case EE_STATE_1_0:\r |
| 399 | jerry_ee_rstate = EE_STATE_1_1;\r |
| 400 | jerry_ee_state = EE_READ_DATA;\r |
| 401 | jerry_ee_data_cnt = 16;\r |
| 402 | jerry_ee_data = 0;\r |
| 403 | jerry_ee_direct_jump = 1;\r |
| 404 | break;\r |
| 405 | case EE_STATE_1_1:\r |
| 406 | #ifdef eeprom_LOG\r |
| 407 | WriteLog("eeprom: writing 0x%.4x at 0x%.2x\n",jerry_ee_data,jerry_ee_address_data);\r |
| 408 | #endif\r |
| 409 | if (jerry_writes_enabled)\r |
| 410 | {\r |
| 411 | eeprom_ram[jerry_ee_address_data] = jerry_ee_data;\r |
| 412 | EEPROMSave(); // Save it NOW!\r |
| 413 | }\r |
| 414 | \r |
| 415 | jerry_ee_state = EE_STATE_BUSY;\r |
| 416 | break;\r |
| 417 | case EE_STATE_2:\r |
| 418 | jerry_ee_rstate = EE_STATE_2_0;\r |
| 419 | jerry_ee_state = EE_READ_ADDRESS;\r |
| 420 | jerry_ee_address_cnt = 6;\r |
| 421 | jerry_ee_address_data = 0;\r |
| 422 | jerry_ee_data_cnt = 16;\r |
| 423 | jerry_ee_data = 0;\r |
| 424 | break;\r |
| 425 | case EE_STATE_3:\r |
| 426 | jerry_ee_rstate = EE_STATE_3_0;\r |
| 427 | jerry_ee_state = EE_READ_ADDRESS;\r |
| 428 | jerry_ee_address_cnt = 6;\r |
| 429 | jerry_ee_address_data = 0;\r |
| 430 | jerry_ee_direct_jump = 1;\r |
| 431 | break;\r |
| 432 | case EE_STATE_3_0:\r |
| 433 | #ifdef eeprom_LOG\r |
| 434 | WriteLog("eeprom: erasing 0x%.2x\n",jerry_ee_address_data);\r |
| 435 | #endif\r |
| 436 | if (jerry_writes_enabled)\r |
| 437 | eeprom_ram[jerry_ee_address_data] = 0xFFFF;\r |
| 438 | \r |
| 439 | jerry_ee_state = EE_STATE_BUSY;\r |
| 440 | break;\r |
| 441 | case EE_READ_DATA:\r |
| 442 | #ifdef eeprom_LOG\r |
| 443 | WriteLog("eeprom:\t\t\t%i bit %i\n",data,jerry_ee_data_cnt-1);\r |
| 444 | #endif\r |
| 445 | jerry_ee_data <<= 1;\r |
| 446 | jerry_ee_data |= data;\r |
| 447 | jerry_ee_data_cnt--;\r |
| 448 | \r |
| 449 | if (!jerry_ee_data_cnt)\r |
| 450 | {\r |
| 451 | jerry_ee_state = jerry_ee_rstate;\r |
| 452 | \r |
| 453 | if (jerry_ee_direct_jump)\r |
| 454 | eeprom_set_di(data);\r |
| 455 | }\r |
| 456 | \r |
| 457 | break;\r |
| 458 | case EE_READ_ADDRESS:\r |
| 459 | jerry_ee_address_data <<= 1;\r |
| 460 | jerry_ee_address_data |= data;\r |
| 461 | jerry_ee_address_cnt--;\r |
| 462 | #ifdef eeprom_LOG\r |
| 463 | WriteLog("eeprom:\t%i bits remaining\n",jerry_ee_address_cnt);\r |
| 464 | #endif\r |
| 465 | \r |
| 466 | if (!jerry_ee_address_cnt)\r |
| 467 | {\r |
| 468 | jerry_ee_state = jerry_ee_rstate;\r |
| 469 | #ifdef eeprom_LOG\r |
| 470 | WriteLog("eeprom:\t\tread address 0x%.2x\n",jerry_ee_address_data);\r |
| 471 | #endif\r |
| 472 | \r |
| 473 | if (jerry_ee_direct_jump)\r |
| 474 | eeprom_set_di(data);\r |
| 475 | }\r |
| 476 | \r |
| 477 | break;\r |
| 478 | default:\r |
| 479 | jerry_ee_state = EE_STATE_OP_A;\r |
| 480 | }\r |
| 481 | }\r |
| 482 | \r |
| 483 | \r |
| 484 | static void eeprom_set_cs(uint32_t state)\r |
| 485 | {\r |
| 486 | #ifdef eeprom_LOG\r |
| 487 | WriteLog("eeprom: cs=%i\n",state);\r |
| 488 | #endif\r |
| 489 | jerry_ee_state = EE_STATE_START;\r |
| 490 | jerry_ee_op = 0;\r |
| 491 | jerry_ee_rstate = 0;\r |
| 492 | jerry_ee_address_data = 0;\r |
| 493 | jerry_ee_address_cnt = 6;\r |
| 494 | jerry_ee_data = 0;\r |
| 495 | jerry_ee_data_cnt = 16;\r |
| 496 | jerry_writes_enabled = 1;\r |
| 497 | }\r |
| 498 | \r |
| 499 | \r |
| 500 | static uint32_t eeprom_get_do(void)\r |
| 501 | {\r |
| 502 | uint16_t data = 1;\r |
| 503 | \r |
| 504 | switch (jerry_ee_state)\r |
| 505 | {\r |
| 506 | case EE_STATE_START:\r |
| 507 | data = 1;\r |
| 508 | break;\r |
| 509 | case EE_STATE_BUSY:\r |
| 510 | jerry_ee_state = EE_STATE_START;\r |
| 511 | data = 0;\r |
| 512 | break;\r |
| 513 | case EE_STATE_2_0:\r |
| 514 | jerry_ee_data_cnt--;\r |
| 515 | data = (eeprom_ram[jerry_ee_address_data] >> jerry_ee_data_cnt) & 0x01;\r |
| 516 | \r |
| 517 | if (!jerry_ee_data_cnt)\r |
| 518 | {\r |
| 519 | #ifdef eeprom_LOG\r |
| 520 | //WriteLog("eeprom: read 0x%.4x at 0x%.2x cpu %i pc=0x%.8x\n",eeprom_ram[jerry_ee_address_data],jerry_ee_address_data,jaguar_cpu_in_exec,s68000readPC());\r |
| 521 | #endif\r |
| 522 | jerry_ee_state = EE_STATE_START;\r |
| 523 | }\r |
| 524 | break;\r |
| 525 | }\r |
| 526 | \r |
| 527 | #ifdef eeprom_LOG\r |
| 528 | WriteLog("eeprom: do=%i\n",data);\r |
| 529 | #endif\r |
| 530 | return data;\r |
| 531 | }\r |
| 532 | \r |