75 lines
2.0 KiB
C++
75 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 193 - NTDEC TC-112
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* Fighting Hero (Unl)
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* War in the Gulf & (its Brazilian localization)
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*
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*/
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#pragma once
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#include "Nes_Mapper.h"
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// NTDEC's TC-112 mapper IC.
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class Mapper193 : public Nes_Mapper {
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public:
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Mapper193()
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{
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register_state( regs, sizeof regs );
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}
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virtual void reset_state()
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{ }
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virtual void apply_mapping()
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{
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for ( size_t i = 0; i < sizeof regs; i++ )
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write_intercepted( 0, 0x6000 + i, regs [ i ] );
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set_prg_bank( 0xA000, bank_8k, ~2 );
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set_prg_bank( 0xC000, bank_8k, ~1 );
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set_prg_bank( 0xE000, bank_8k, ~0 );
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intercept_writes( 0x6000, 0x03 );
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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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virtual bool write_intercepted( nes_time_t, nes_addr_t addr, int data )
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{
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if ( addr < 0x6000 || addr > 0x6003 )
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return false;
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regs [ addr & 0x03 ] = data;
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switch ( addr & 0x03 )
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{
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case 0: set_chr_bank( 0x0000, bank_4k, regs [ 0 ] >> 2 ); break;
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case 1: set_chr_bank( 0x1000, bank_2k, regs [ 1 ] >> 1 ); break;
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case 2: set_chr_bank( 0x1800, bank_2k, regs [ 2 ] >> 1 ); break;
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case 3: set_prg_bank( 0x8000, bank_8k, regs [ 3 ] ); break;
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}
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return true;
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}
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uint8_t regs [ 4 ];
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};
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