113 lines
2.8 KiB
C++
113 lines
2.8 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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* 3/24/18
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*
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* Mapper 88
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* Mapper 154
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* Mapper 206
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*/
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#pragma once
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#include "Nes_Mapper.h"
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struct namco_34x3_state_t
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{
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uint8_t bank [ 8 ];
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uint8_t mirr;
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uint8_t mode;
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};
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BOOST_STATIC_ASSERT( sizeof (namco_34x3_state_t) == 10 );
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template < bool _is154 >
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class Mapper_Namco_34x3 : public Nes_Mapper, namco_34x3_state_t {
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public:
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Mapper_Namco_34x3()
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{
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namco_34x3_state_t *state = this;
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register_state( state, sizeof *state );
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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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set_chr_bank( 0x0000, bank_2k, bank [ 0 ] );
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set_chr_bank( 0x0800, bank_2k, bank [ 1 ] );
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for ( int i = 0; i < 4; i++ )
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set_chr_bank( 0x1000 + ( i << 10 ), bank_1k, bank [ i + 2 ] );
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set_prg_bank( 0x8000, bank_8k, bank [ 6 ] );
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set_prg_bank( 0xA000, bank_8k, bank [ 7 ] );
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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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if ( _is154 )
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mirror_single( mirr );
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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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switch ( addr & 0xE001 )
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{
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case 0x8000:
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mode = data;
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mirr = ( data >> 6 ) & 0x01;
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if ( _is154 )
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mirror_single( mirr );
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break;
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case 0x8001:
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mode &= 0x07;
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switch ( mode )
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{
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case 0: case 1:
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bank [ mode ] = data >> 1;
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set_chr_bank( 0x0000 + ( mode << 11 ), bank_2k, bank [ mode ] );
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break;
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case 2: case 3: case 4: case 5:
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bank [ mode ] = data | 0x40;
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set_chr_bank( 0x1000 + ( ( mode - 2 ) << 10 ), bank_1k, bank [ mode ] );
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break;
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case 6: case 7:
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bank [ mode ] = data;
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set_prg_bank( 0x8000 + ( ( mode - 6 ) << 13 ), bank_8k, bank [ mode ] );
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break;
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}
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break;
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case 0xC000:
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mirr = ( data >> 6 ) & 0x01;
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if ( _is154 )
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mirror_single( mirr );
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}
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}
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};
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typedef Mapper_Namco_34x3<false> Mapper088;
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// void register_mapper_namco_34xx();
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// void register_mapper_namco_34xx()
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// {
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// register_mapper< Mapper_Namco_34x3 <false> > ( 88 );
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// register_mapper< Mapper_Namco_34x3 <true> > ( 154 );
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// register_mapper< Mapper_Namco_34xx > ( 206 );
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// }
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