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63 lines
2.0 KiB
C++
63 lines
2.0 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) 2015 CaH4e3
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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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* BMC F-15 PCB (256+266 MMC3 based, with 16/32Kb banking discrete logic)
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* 150-in-1 Unchaied Melody FIGHT version with system test (START+SELECT)
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*
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* CHR - MMC3 stock regs
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* PRG - MMC3 regs disabled, area 6000-7FFF used instead
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* 011xxxxxxxxxxxxx addr mask,
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* ----APPp reg bits mask
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* A - higher 128K PRG bank select/32K bank mode override
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* PP - bank number in 32K mode
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* PPp - bank number in 16K mode
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* initial state of extra regs is undefined, A001 enables/disables the 6000 area
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*/
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#include "mapinc.h"
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#include "mmc3.h"
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static void BMCF15PW(uint32 A, uint8 V) {
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uint32 bank = EXPREGS[0] & 0xF;
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uint32 mode = (EXPREGS[0] & 8) >> 3;
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uint32 mask = ~(mode);
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setprg16(0x8000, (bank & mask));
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setprg16(0xC000, (bank & mask) | mode);
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}
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static DECLFW(BMCF15Write) {
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if (A001B & 0x80) {
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EXPREGS[0] = V & 0xF;
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FixMMC3PRG(MMC3_cmd);
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}
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}
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static void BMCF15Power(void) {
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GenMMC3Power();
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SetWriteHandler(0x6000, 0x7FFF, BMCF15Write);
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SetWriteHandler(0x6000, 0x7FFF, BMCF15Write);
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}
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void BMCF15_Init(CartInfo *info) {
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GenMMC3_Init(info, 256, 256, 0, 0);
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pwrap = BMCF15PW;
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info->Power = BMCF15Power;
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AddExState(EXPREGS, 1, 0, "EXPR");
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}
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