/* FCE Ultra - NES/Famicom Emulator * * Copyright notice for this file: * Copyright (C) 2022 NewRisingSun * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /* BlazePro CPLD-based multicarts Unsolved issue: how is CHR RAM write-protection triggered? Known problems: Forever Duo of NES 852-in-1 (rev1): #A370 Time Lord: Hangs with glitchy status bar on NTSC and PAL but not Dendy #A133 Galactic Crusader: Wrong mirroring #A249 Mission Cobra: Wrong mirroring Legendary Games of NES 509-in-1: #189 Huang Di Battle of Zhuolu: Wrong mirroring during intro #227 Kid Niki Niki 2: Title screen animation flickers and looks strange #234 Klax: Screen in wrong position during options screen #365 Rocman X: Graphical garbage in waterfall (middle) level #403 Star Wars: Blank tiles due to lack of CHR RAM write-protection #404 The Empire Strikes Back: Blank tiles due to lack of CHR RAM write-protection #460 Twin Dragons: Wrong mirroring Unlicensed Collection 142-in-1: #59 Huang Di: Wrong mirroring during intro #84 Ms. Pac-Man: Wrong mirroring #102 Rocman X: Graphical garbage in waterfall (middle) level #132 Trolls on Treasure Island: Wrong mirroring during map Unreleased Collection 73-in-1 (v1.01): #38 Holy Diver: Wrong mirroring during first scene */ #include "mapinc.h" #include "state.h" static uint8 submapper; static uint8 eeprom[16], eep_clock, state, command, output; /* Some strange serial EEPROM */ static uint8 *WRAM; static uint32 WRAMSIZE; static int prevSFEXINDEX; extern int SFEXINDEX; extern SFORMAT SFMDATA[64]; static uint8 mapper; /* 5700 MSB >>4 OR'd with submapper <<4 */ static uint8 mapperFlags; /* 5700 LSB */ static uint8 misc; /* 5601 */ static uint8 misc2; /* 5702 */ static void (*sync)(); static uint16 prgOR; static uint8 prgAND; static uint8 regByte[16]; static int16 regWord[9]; #include "468_mmc1.h" #include "468_mmc24.h" #include "468_mmc3.h" #include "468_vrc1.h" #include "468_vrc24.h" #include "468_vrc3.h" #include "468_vrc6.h" #include "468_vrc7.h" #include "468_fme7.h" #include "468_discrete.h" #include "468_cnrom.h" #include "468_if12.h" #include "468_lf36.h" #include "468_nanjing.h" static SFORMAT stateRegs[] = { { &mapper, 1, "SUP0" }, { &mapperFlags, 1, "SUP1" }, { &misc, 1, "SUP2" }, { &misc2, 1, "SUP3" }, { &prgOR, 2, "SUP4" }, { &prgAND, 1, "SUP5" }, { eeprom, 16,"EEPR" }, { &eep_clock, 1, "EEP0" }, { &state, 1, "EEP1" }, { &command, 1, "EEP2" }, { &output, 1, "EEP3" }, { regByte, 16,"REGB" }, { regWord, 16,"REGW" }, { 0 } }; static const uint16 lut509[512] ={ /* Strange look-up table, used only by Legendary Games of NES 509-in-1 */ 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 0, 1, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 4, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 2, 3, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 5, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 256, 6, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296, 297, 298, 299, 300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315, 316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329, 330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 343, 344, 345, 346, 347, 349, 350, 351, 352, 353, 354, 355, 356, 357, 358, 359, 360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374, 375, 376, 377, 378, 379, 380, 381, 382, 383, 384, 385, 386, 387, 388, 389, 390, 391, 392, 393, 394, 395, 396, 397, 398, 399, 400, 401, 402, 403, 404, 405, 406, 407, 408, 409, 410, 411, 412, 413, 414, 415, 416, 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, 427, 428, 429, 430, 431, 432, 433, 434, 435, 436, 437, 438, 439, 440, 441, 442, 443, 444, 445, 446, 447, 448, 449, 450, 451, 452, 453, 454, 455, 456, 457, 458, 459, 460, 461, 462, 463, 464, 465, 466, 467, 468, 469, 470, 471, 472, 473, 474, 475, 476, 477, 478, 479, 480, 481, 482, 483, 484, 485, 486, 487, 488, 489, 490, 491, 492, 493, 494, 495, 496, 497, 498, 499, 500, 501, 502, 503, 504, 505, 506, 507, 508, 512, 513, 514, 515, 516, 517 }; void setPins(uint8 select, uint8 newClock, uint8 newData) { /* Serial EEPROM */ if (select) state =0; else if (!eep_clock && !!newClock) { if (state <8) { command =command <<1 | !!(newData)*1; if (++state ==8 && (command &0xF0) !=0x50 && (command &0xF0) !=0xA0) state =0; } else { int mask =1 <<(15 -state); int address =command &0x0F; if ((command &0xF0) ==0xA0) { eeprom[address] =eeprom[address] &~mask | !!(newData)*mask; /* The "write" command also silently returns the content of a strange lookup table */ output =!!(lut509[eeprom[0] | eeprom[1] | eeprom[2] <<8 &0x1FF] >>(address &1? 0: 8) &mask); } else if ((command &0xF0) ==0x50) output =!!(eeprom[address] &mask); if (++state ==16) state =0; } } eep_clock =newClock; } static DECLFR(readReg); static DECLFW(writeReg); static void setMapper(uint8 clearRegs) { int i; if (clearRegs) { for (i =0; i <16; i++) regByte[i] =0; for (i =0; i < 8; i++) regWord[i] =0; X6502_IRQEnd(FCEU_IQEXT); } SetReadHandler(0x5000, 0x5FFF, readReg); SetReadHandler(0x6000, 0xFFFF, CartBR); SetWriteHandler(0x5000, 0x5FFF, writeReg); SetWriteHandler(0x6000, 0xFFFF, CartBW); MapIRQHook = NULL; PPU_hook = NULL; GameHBIRQHook = NULL; setprg8r(0x10, 0x6000, 0); switch(mapper) { /* 5700 MSB >>4 OR'd with submapper <<4 */ case 0x00: case 0x01: case 0x32: MMC1_reset(clearRegs); break; case 0x0A: MMC2_reset(clearRegs); break; case 0x10: case 0x11: case 0x12: MMC3_reset(clearRegs); break; case 0x08: MMC4_reset(clearRegs); break; case 0x40: VRC1_reset(clearRegs); break; case 0x20: case 0x21: case 0x22: case 0x23: VRC24_reset(clearRegs); break; case 0x44: VRC3_reset(clearRegs); break; case 0x30: case 0x31: VRC6_reset(clearRegs); break; case 0x41: VRC7_reset(clearRegs); break; case 0x07: LF36_reset(clearRegs); break; case 0x50: FME7_reset(clearRegs); break; case 0x0E: case 0x1E: NANJING_reset(clearRegs); break; case 0x09: case 0x0B: case 0x17: case 0x37: UNROM_IF12_reset(clearRegs); break; case 0x04: case 0x06: case 0x14: case 0x16: ANROM_BNROM_reset(clearRegs); break; case 0x05: case 0x15: CNROM_BF9097_reset(clearRegs); break; case 0x0C: case 0x0D: case 0x1C: case 0x1D: GNROM_reset(clearRegs); break; default: break; } sync(); } static DECLFR(readReg) { switch(A) { case 0x5301: case 0x5601: return output? 0x80: 0x00; default: return 0xFF; } } static DECLFW(writeReg) { switch(A) { case 0x5301: if (submapper ==0) setPins(!!(V &0x04), !!(V &0x02), !!(V &0x01)); break; case 0x5601: if (~misc &0x80) { misc =V; if (submapper !=1) { prgOR =prgOR &~0x2000 | V <<9 &0x2000; sync(); } } if (submapper ==1) setPins(!!(V &0x10), !!(V &0x02), !!(V &0x01)); break; case 0x5700: mapper =V >>4 | submapper <<4; mapperFlags =V &0xF; prgOR =prgOR &~0x0010 | V <<4 &0x0010; setMapper(1); break; case 0x5701: prgOR =prgOR &~0x1FE0 | V <<5 &0x1FE0; sync(); break; case 0x5702: if (submapper ==1) { misc2 =V; prgOR =prgOR &~0x2000 | V <<9 &0x2000; setMapper(0); /* The misc2 value is required for prgAND by MMC3 and UNROM */ } break; } } static void reset(void) { mapper =submapper <<4; mapperFlags =0x0F; misc =0; misc2 =0; prgOR =0x7FF0; eep_clock =command =output =1; command =state =0; setMapper(1); } static void power(void) { int i; for (i =0; i <16; i++) eeprom[i] =0; reset(); } static void close(void) { if (WRAM) FCEU_gfree(WRAM); WRAM = NULL; } static void stateRestore(int version) { setMapper(0); } void Mapper468_Init(CartInfo *info) { submapper =info->submapper; info->Reset =reset; info->Power =power; info->Close =close; GameStateRestore =stateRestore; WRAMSIZE =8192; WRAM =(uint8*) FCEU_gmalloc(WRAMSIZE); SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1); AddExState(WRAM, WRAMSIZE, 0, "WRAM"); AddExState(stateRegs, ~0, 0, 0); prevSFEXINDEX =SFEXINDEX; }