273 lines
10 KiB
C
273 lines
10 KiB
C
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2022 NewRisingSun
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/* BlazePro CPLD-based multicarts
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Unsolved issue: how is CHR RAM write-protection triggered?
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Known problems:
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Forever Duo of NES 852-in-1 (rev1):
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#A370 Time Lord: Hangs with glitchy status bar on NTSC and PAL but not Dendy
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#A133 Galactic Crusader: Wrong mirroring
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#A249 Mission Cobra: Wrong mirroring
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Legendary Games of NES 509-in-1:
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#189 Huang Di Battle of Zhuolu: Wrong mirroring during intro
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#227 Kid Niki Niki 2: Title screen animation flickers and looks strange
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#234 Klax: Screen in wrong position during options screen
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#365 Rocman X: Graphical garbage in waterfall (middle) level
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#403 Star Wars: Blank tiles due to lack of CHR RAM write-protection
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#404 The Empire Strikes Back: Blank tiles due to lack of CHR RAM write-protection
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#460 Twin Dragons: Wrong mirroring
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Unlicensed Collection 142-in-1:
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#59 Huang Di: Wrong mirroring during intro
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#84 Ms. Pac-Man: Wrong mirroring
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#102 Rocman X: Graphical garbage in waterfall (middle) level
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#132 Trolls on Treasure Island: Wrong mirroring during map
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Unreleased Collection 73-in-1 (v1.01):
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#38 Holy Diver: Wrong mirroring during first scene
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*/
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#include "mapinc.h"
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#include "state.h"
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static uint8 submapper;
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static uint8 eeprom[16], eep_clock, state, command, output; /* Some strange serial EEPROM */
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static uint8 *WRAM;
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static uint32 WRAMSIZE;
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static int prevSFEXINDEX;
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extern int SFEXINDEX;
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extern SFORMAT SFMDATA[64];
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static uint8 mapper; /* 5700 MSB >>4 OR'd with submapper <<4 */
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static uint8 mapperFlags; /* 5700 LSB */
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static uint8 misc; /* 5601 */
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static uint8 misc2; /* 5702 */
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static void (*sync)();
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static uint16 prgOR;
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static uint8 prgAND;
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static uint8 regByte[16];
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static int16 regWord[9];
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#include "468_mmc1.h"
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#include "468_mmc24.h"
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#include "468_mmc3.h"
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#include "468_vrc1.h"
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#include "468_vrc24.h"
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#include "468_vrc3.h"
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#include "468_vrc6.h"
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#include "468_vrc7.h"
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#include "468_fme7.h"
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#include "468_discrete.h"
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#include "468_cnrom.h"
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#include "468_if12.h"
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#include "468_lf36.h"
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#include "468_nanjing.h"
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static SFORMAT stateRegs[] = {
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{ &mapper, 1, "SUP0" },
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{ &mapperFlags, 1, "SUP1" },
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{ &misc, 1, "SUP2" },
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{ &misc2, 1, "SUP3" },
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{ &prgOR, 2, "SUP4" },
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{ &prgAND, 1, "SUP5" },
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{ eeprom, 16,"EEPR" },
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{ &eep_clock, 1, "EEP0" },
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{ &state, 1, "EEP1" },
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{ &command, 1, "EEP2" },
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{ &output, 1, "EEP3" },
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{ regByte, 16,"REGB" },
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{ regWord, 16,"REGW" },
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{ 0 }
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};
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static const uint16 lut509[512] ={ /* Strange look-up table, used only by Legendary Games of NES 509-in-1 */
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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,
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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,
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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,
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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,
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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,
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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,
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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,
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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,
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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,
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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,
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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,
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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,
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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
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};
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void setPins(uint8 select, uint8 newClock, uint8 newData) { /* Serial EEPROM */
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if (select)
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state =0;
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else
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if (!eep_clock && !!newClock) {
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if (state <8) {
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command =command <<1 | !!(newData)*1;
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if (++state ==8 && (command &0xF0) !=0x50 && (command &0xF0) !=0xA0) state =0;
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} else {
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int mask =1 <<(15 -state);
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int address =command &0x0F;
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if ((command &0xF0) ==0xA0) {
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eeprom[address] =eeprom[address] &~mask | !!(newData)*mask;
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/* The "write" command also silently returns the content of a strange lookup table */
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output =!!(lut509[eeprom[0] | eeprom[1] | eeprom[2] <<8 &0x1FF] >>(address &1? 0: 8) &mask);
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} else
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if ((command &0xF0) ==0x50)
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output =!!(eeprom[address] &mask);
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if (++state ==16) state =0;
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}
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}
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eep_clock =newClock;
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}
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static DECLFR(readReg);
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static DECLFW(writeReg);
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static void setMapper(uint8 clearRegs) {
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int i;
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if (clearRegs) {
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for (i =0; i <16; i++) regByte[i] =0;
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for (i =0; i < 8; i++) regWord[i] =0;
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X6502_IRQEnd(FCEU_IQEXT);
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}
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SetReadHandler(0x5000, 0x5FFF, readReg);
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SetReadHandler(0x6000, 0xFFFF, CartBR);
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SetWriteHandler(0x5000, 0x5FFF, writeReg);
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SetWriteHandler(0x6000, 0xFFFF, CartBW);
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MapIRQHook = NULL;
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PPU_hook = NULL;
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GameHBIRQHook = NULL;
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setprg8r(0x10, 0x6000, 0);
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switch(mapper) { /* 5700 MSB >>4 OR'd with submapper <<4 */
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case 0x00: case 0x01: case 0x32: MMC1_reset(clearRegs); break;
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case 0x0A: MMC2_reset(clearRegs); break;
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case 0x10: case 0x11: case 0x12: MMC3_reset(clearRegs); break;
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case 0x08: MMC4_reset(clearRegs); break;
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case 0x40: VRC1_reset(clearRegs); break;
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case 0x20: case 0x21: case 0x22: case 0x23: VRC24_reset(clearRegs); break;
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case 0x44: VRC3_reset(clearRegs); break;
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case 0x30: case 0x31: VRC6_reset(clearRegs); break;
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case 0x41: VRC7_reset(clearRegs); break;
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case 0x07: LF36_reset(clearRegs); break;
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case 0x50: FME7_reset(clearRegs); break;
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case 0x0E: case 0x1E: NANJING_reset(clearRegs); break;
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case 0x09: case 0x0B: case 0x17: case 0x37: UNROM_IF12_reset(clearRegs); break;
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case 0x04: case 0x06: case 0x14: case 0x16: ANROM_BNROM_reset(clearRegs); break;
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case 0x05: case 0x15: CNROM_BF9097_reset(clearRegs); break;
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case 0x0C: case 0x0D: case 0x1C: case 0x1D: GNROM_reset(clearRegs); break;
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default: break;
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}
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sync();
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}
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static DECLFR(readReg) {
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switch(A) {
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case 0x5301: case 0x5601:
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return output? 0x80: 0x00;
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default:
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return 0xFF;
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}
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}
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static DECLFW(writeReg) {
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switch(A) {
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case 0x5301:
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if (submapper ==0) setPins(!!(V &0x04), !!(V &0x02), !!(V &0x01));
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break;
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case 0x5601:
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if (~misc &0x80) {
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misc =V;
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if (submapper !=1) {
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prgOR =prgOR &~0x2000 | V <<9 &0x2000;
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sync();
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}
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}
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if (submapper ==1) setPins(!!(V &0x10), !!(V &0x02), !!(V &0x01));
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break;
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case 0x5700:
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mapper =V >>4 | submapper <<4;
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mapperFlags =V &0xF;
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prgOR =prgOR &~0x0010 | V <<4 &0x0010;
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setMapper(1);
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break;
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case 0x5701:
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prgOR =prgOR &~0x1FE0 | V <<5 &0x1FE0;
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sync();
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break;
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case 0x5702:
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if (submapper ==1) {
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misc2 =V;
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prgOR =prgOR &~0x2000 | V <<9 &0x2000;
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setMapper(0); /* The misc2 value is required for prgAND by MMC3 and UNROM */
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}
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break;
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}
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}
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static void reset(void) {
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mapper =submapper <<4;
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mapperFlags =0x0F;
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misc =0;
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misc2 =0;
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prgOR =0x7FF0;
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eep_clock =command =output =1;
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command =state =0;
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setMapper(1);
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}
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static void power(void) {
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int i;
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for (i =0; i <16; i++) eeprom[i] =0;
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reset();
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}
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static void close(void) {
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if (WRAM)
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FCEU_gfree(WRAM);
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WRAM = NULL;
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}
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static void stateRestore(int version) {
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setMapper(0);
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}
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void Mapper468_Init(CartInfo *info) {
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submapper =info->submapper;
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info->Reset =reset;
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info->Power =power;
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info->Close =close;
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GameStateRestore =stateRestore;
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WRAMSIZE =8192;
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WRAM =(uint8*) FCEU_gmalloc(WRAMSIZE);
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SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
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AddExState(WRAM, WRAMSIZE, 0, "WRAM");
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AddExState(stateRegs, ~0, 0, 0);
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prevSFEXINDEX =SFEXINDEX;
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}
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