90 lines
2.6 KiB
C
90 lines
2.6 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) 2008 CaH4e3
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* Copyright (C) 2019 Libretro Team
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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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/* NES 2.0 Mapper 287
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* BMC-411120-C, actually cart ID is 811120-C, sorry ;) K-3094 - another ID
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* - 4-in-1 (411120-C)
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* - 4-in-1 (811120-C,411120-C) [p4][U]
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*
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* BMC-K-3088, similar to BMC-411120-C but without jumper or dipswitch
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* - 19-in-1(K-3088)(810849-C)(Unl)
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*/
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#include "mapinc.h"
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#include "mmc3.h"
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static uint8 reset_flag = 0;
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static uint8 isK3088;
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static void BMC411120CCW(uint32 A, uint8 V) {
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uint32 mask = isK3088 ? 0x07 : 0x03;
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setchr1(A, V | ((EXPREGS[0] & mask) << 7));
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}
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static void BMC411120CPW(uint32 A, uint8 V) {
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uint32 mask = isK3088 ? 0x07 : 0x03;
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if (EXPREGS[0] & (isK3088 ? 8 : (8 | reset_flag))) { /* 32K Mode */
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if (A == 0x8000)
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/* bit 0-1 of register should be used as outer bank regardless of banking modes */
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setprg32(A, ((EXPREGS[0] >> 4) & 3) | ((EXPREGS[0] & mask) << 2));
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} else /* MMC3 Mode */
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setprg8(A, (V & 0x0F) | ((EXPREGS[0] & mask) << 4));
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}
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static DECLFW(BMC411120CLoWrite) {
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/* printf("Wr: A:%04x V:%02x\n", A, V); */
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EXPREGS[0] = A;
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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}
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static void BMC411120CReset(void) {
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EXPREGS[0] = 0;
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reset_flag ^= 4;
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MMC3RegReset();
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}
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static void BMC411120CPower(void) {
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EXPREGS[0] = 0;
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GenMMC3Power();
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SetWriteHandler(0x6000, 0x7FFF, BMC411120CLoWrite);
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}
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void BMC411120C_Init(CartInfo *info) {
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isK3088 = 0;
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GenMMC3_Init(info, 128, 128, 8, 0);
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pwrap = BMC411120CPW;
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cwrap = BMC411120CCW;
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info->Power = BMC411120CPower;
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info->Reset = BMC411120CReset;
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AddExState(EXPREGS, 1, 0, "EXPR");
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}
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void BMCK3088_Init(CartInfo *info) {
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isK3088 = 1;
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GenMMC3_Init(info, 128, 128, 8, 0);
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pwrap = BMC411120CPW;
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cwrap = BMC411120CCW;
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info->Power = BMC411120CPower;
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info->Reset = BMC411120CReset;
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AddExState(EXPREGS, 1, 0, "EXPR");
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}
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