quickerNES/source/core/mappers/mapper088.hpp

113 lines
2.8 KiB
C++

/* Copyright notice for this file:
* Copyright (C) 2018
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* This mapper was added by retrowertz for Libretro port of QuickNES.
* 3/24/18
*
* Mapper 88
* Mapper 154
* Mapper 206
*/
#pragma once
#include "Nes_Mapper.h"
struct namco_34x3_state_t
{
uint8_t bank [ 8 ];
uint8_t mirr;
uint8_t mode;
};
BOOST_STATIC_ASSERT( sizeof (namco_34x3_state_t) == 10 );
template < bool _is154 >
class Mapper_Namco_34x3 : public Nes_Mapper, namco_34x3_state_t {
public:
Mapper_Namco_34x3()
{
namco_34x3_state_t *state = this;
register_state( state, sizeof *state );
}
virtual void reset_state()
{ }
virtual void apply_mapping()
{
set_chr_bank( 0x0000, bank_2k, bank [ 0 ] );
set_chr_bank( 0x0800, bank_2k, bank [ 1 ] );
for ( int i = 0; i < 4; i++ )
set_chr_bank( 0x1000 + ( i << 10 ), bank_1k, bank [ i + 2 ] );
set_prg_bank( 0x8000, bank_8k, bank [ 6 ] );
set_prg_bank( 0xA000, bank_8k, bank [ 7 ] );
set_prg_bank( 0xC000, bank_8k, ~1 );
set_prg_bank( 0xE000, bank_8k, ~0 );
if ( _is154 )
mirror_single( mirr );
}
virtual void write( nes_time_t, nes_addr_t addr, int data )
{
switch ( addr & 0xE001 )
{
case 0x8000:
mode = data;
mirr = ( data >> 6 ) & 0x01;
if ( _is154 )
mirror_single( mirr );
break;
case 0x8001:
mode &= 0x07;
switch ( mode )
{
case 0: case 1:
bank [ mode ] = data >> 1;
set_chr_bank( 0x0000 + ( mode << 11 ), bank_2k, bank [ mode ] );
break;
case 2: case 3: case 4: case 5:
bank [ mode ] = data | 0x40;
set_chr_bank( 0x1000 + ( ( mode - 2 ) << 10 ), bank_1k, bank [ mode ] );
break;
case 6: case 7:
bank [ mode ] = data;
set_prg_bank( 0x8000 + ( ( mode - 6 ) << 13 ), bank_8k, bank [ mode ] );
break;
}
break;
case 0xC000:
mirr = ( data >> 6 ) & 0x01;
if ( _is154 )
mirror_single( mirr );
}
}
};
typedef Mapper_Namco_34x3<false> Mapper088;
// void register_mapper_namco_34xx();
// void register_mapper_namco_34xx()
// {
// register_mapper< Mapper_Namco_34x3 <false> > ( 88 );
// register_mapper< Mapper_Namco_34x3 <true> > ( 154 );
// register_mapper< Mapper_Namco_34xx > ( 206 );
// }