82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
/* Copyright notice for this file:
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* Copyright (C) 2018
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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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* This mapper was added by retrowertz for Libretro port of QuickNES.
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*
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* Mapper 180 Crazy Climber
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*
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*/
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#include "Nes_Mapper.h"
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template <bool _is152>
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class Mapper_74x161x162x32 : public Nes_Mapper
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{
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public:
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Mapper_74x161x162x32()
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{
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register_state(&bank, 1);
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}
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virtual void reset_state()
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{
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if (_is152 == 0)
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bank = ~0;
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}
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virtual void apply_mapping()
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{
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if (_is152)
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write(0, 0, bank);
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else
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{
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intercept_writes(0x6000, 1);
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write_intercepted(0, 0x6000, bank);
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}
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}
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virtual bool write_intercepted(nes_time_t, nes_addr_t addr, int data)
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{
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if ((addr != 0x6000) || _is152)
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return false;
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bank = data;
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set_prg_bank(0x8000, bank_32k, (bank >> 4) & 0x03);
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set_chr_bank(0x0000, bank_8k, ((bank >> 4) & 0x04) | (bank & 0x03));
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return true;
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}
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virtual void write(nes_time_t, nes_addr_t addr, int data)
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{
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if (_is152 == 0) return;
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bank = handle_bus_conflict(addr, data);
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set_prg_bank(0x8000, bank_16k, (bank >> 4) & 0x07);
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set_chr_bank(0x0000, bank_8k, bank & 0x0F);
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mirror_single((bank >> 7) & 0x01);
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}
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uint8_t bank;
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};
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void register_mapper_70();
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void register_mapper_70()
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{
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register_mapper<Mapper_74x161x162x32<true>>(70);
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}
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