109 lines
2.5 KiB
C++
109 lines
2.5 KiB
C++
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// Game_Music_Emu $vers. http://www.slack.net/~ant/
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#include "Sgc_Core.h"
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/* Copyright (C) 2009 Shay Green. This module is free software; you
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can redistribute it and/or modify it under the terms of the GNU Lesser
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General Public License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version. This
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module is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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details. You should have received a copy of the GNU Lesser General Public
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License along with this module; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
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#include "blargg_source.h"
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void Sgc_Core::set_tempo( double t )
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{
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set_play_period( clock_rate() / (header().rate ? 50 : 60) / t );
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}
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blargg_err_t Sgc_Core::load_( Data_Reader& dr )
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{
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RETURN_ERR( Sgc_Impl::load_( dr ) );
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if ( sega_mapping() && fm_apu_.supported() )
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RETURN_ERR( fm_apu_.init( clock_rate(), clock_rate() / 72 ) );
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set_tempo( 1.0 );
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return blargg_ok;
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}
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blargg_err_t Sgc_Core::start_track( int t )
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{
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if ( sega_mapping() )
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{
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apu_.reset();
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fm_apu_.reset();
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fm_accessed = false;
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}
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else
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{
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apu_.reset( 0x0003, 15 );
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}
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return Sgc_Impl::start_track( t );
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}
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blargg_err_t Sgc_Core::end_frame( time_t t )
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{
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RETURN_ERR( Sgc_Impl::end_frame( t ) );
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apu_.end_frame( t );
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if ( sega_mapping() && fm_accessed )
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{
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if ( fm_apu_.supported() )
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fm_apu_.end_frame( t );
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else
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set_warning( "FM sound not supported" );
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}
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return blargg_ok;
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}
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Sgc_Core::Sgc_Core()
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{ }
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Sgc_Core::~Sgc_Core()
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{ }
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void Sgc_Core::cpu_out( time_t time, addr_t addr, int data )
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{
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int port = addr & 0xFF;
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if ( sega_mapping() )
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{
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switch ( port )
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{
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case 0x06:
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apu_.write_ggstereo( time, data );
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return;
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case 0x7E:
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case 0x7F:
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apu_.write_data( time, data ); dprintf( "$7E<-%02X\n", data );
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return;
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case 0xF0:
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fm_accessed = true;
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if ( fm_apu_.supported() )
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fm_apu_.write_addr( data );//, dprintf( "$F0<-%02X\n", data );
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return;
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case 0xF1:
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fm_accessed = true;
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if ( fm_apu_.supported() )
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fm_apu_.write_data( time, data );//, dprintf( "$F1<-%02X\n", data );
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return;
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}
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}
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else if ( port >= 0xE0 )
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{
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apu_.write_data( time, data );
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return;
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}
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Sgc_Impl::cpu_out( time, addr, data );
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}
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