diff options
Diffstat (limited to 'plugins/gme/game-music-emu-0.6pre/gme/Hes_Cpu.cpp')
-rw-r--r-- | plugins/gme/game-music-emu-0.6pre/gme/Hes_Cpu.cpp | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-0.6pre/gme/Hes_Cpu.cpp b/plugins/gme/game-music-emu-0.6pre/gme/Hes_Cpu.cpp new file mode 100644 index 00000000..6c1f7d73 --- /dev/null +++ b/plugins/gme/game-music-emu-0.6pre/gme/Hes_Cpu.cpp @@ -0,0 +1,123 @@ +// Game_Music_Emu 0.6-pre. http://www.slack.net/~ant/ + +#include "Hes_Cpu.h" + +#include "blargg_endian.h" +#include "Hes_Core.h" + +//#include "hes_cpu_log.h" + +/* Copyright (C) 2003-2008 Shay Green. This module is free software; you +can redistribute it and/or modify it under the terms of the GNU Lesser +General Public License as published by the Free Software Foundation; either +version 2.1 of the License, or (at your option) any later version. This +module 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 Lesser General Public License for more +details. You should have received a copy of the GNU Lesser General Public +License along with this module; if not, write to the Free Software Foundation, +Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ + +#include "blargg_source.h" + +#define PAGE HES_CPU_PAGE + +int Hes_Core::read_mem( addr_t addr ) +{ + check( addr < 0x10000 ); + int result = *cpu.get_code( addr ); + if ( cpu.mmr [PAGE( addr )] == 0xFF ) + result = read_mem_( addr ); + return result; +} + +void Hes_Core::write_mem( addr_t addr, int data ) +{ + check( addr < 0x10000 ); + byte* out = write_pages [PAGE( addr )]; + if ( out ) + out [addr & (cpu.page_size - 1)] = data; + else if ( cpu.mmr [PAGE( addr )] == 0xFF ) + write_mem_( addr, data ); +} + +void Hes_Core::set_mmr( int page, int bank ) +{ + write_pages [page] = 0; + byte* data = rom.at_addr( bank * cpu.page_size ); + if ( bank >= 0x80 ) + { + data = 0; + switch ( bank ) + { + case 0xF8: + data = ram; + break; + + case 0xF9: + case 0xFA: + case 0xFB: + data = &sgx [(bank - 0xF9) * cpu.page_size]; + break; + + default: + if ( bank != 0xFF ) + dprintf( "Unmapped bank $%02X\n", bank ); + data = rom.unmapped(); + goto end; + } + + write_pages [page] = data; + } +end: + cpu.set_mmr( page, bank, data ); +} + +#define READ_FAST( addr, out ) \ +{\ + out = READ_CODE( addr );\ + if ( CPU.mmr [PAGE( addr )] == 0xFF )\ + {\ + FLUSH_TIME();\ + out = read_mem_( addr );\ + CACHE_TIME();\ + }\ +} + +#define WRITE_FAST( addr, data ) \ +{\ + int page = PAGE( addr );\ + byte* out = write_pages [page];\ + addr &= CPU.page_size - 1;\ + if ( out )\ + {\ + out [addr] = data;\ + }\ + else if ( CPU.mmr [page] == 0xFF )\ + {\ + FLUSH_TIME();\ + write_mem_( addr, data );\ + CACHE_TIME();\ + }\ +} + +#define READ_LOW( addr ) (ram [addr]) +#define WRITE_LOW( addr, data ) (ram [addr] = data) +#define READ_MEM( addr ) read_mem( addr ) +#define WRITE_MEM( addr, data ) write_mem( addr, data ) +#define WRITE_VDP( addr, data ) write_vdp( addr, data ) +#define CPU_DONE( result_out ) { FLUSH_TIME(); result_out = cpu_done(); CACHE_TIME(); } +#define SET_MMR( reg, bank ) set_mmr( reg, bank ) + +#define CPU cpu +#define IDLE_ADDR idle_addr + +#define CPU_BEGIN \ +bool Hes_Core::run_cpu( time_t end_time )\ +{\ + cpu.set_end_time( end_time ); + + #include "Hes_Cpu_run.h" + + return illegal_encountered; +} |