diff options
Diffstat (limited to 'plugins/gme/game-music-emu-0.6pre/gme/Gb_Cpu.cpp')
-rw-r--r-- | plugins/gme/game-music-emu-0.6pre/gme/Gb_Cpu.cpp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-0.6pre/gme/Gb_Cpu.cpp b/plugins/gme/game-music-emu-0.6pre/gme/Gb_Cpu.cpp new file mode 100644 index 00000000..4a97ffb5 --- /dev/null +++ b/plugins/gme/game-music-emu-0.6pre/gme/Gb_Cpu.cpp @@ -0,0 +1,51 @@ +// Game_Music_Emu 0.6-pre. http://www.slack.net/~ant/ + +#include "Gb_Cpu.h" + +#include "blargg_endian.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" + +inline void Gb_Cpu::set_code_page( int i, void* p ) +{ + byte* p2 = STATIC_CAST(byte*,p) - GB_CPU_OFFSET( i * page_size ); + cpu_state_.code_map [i] = p2; + cpu_state->code_map [i] = p2; +} + +void Gb_Cpu::reset( void* unmapped ) +{ + check( cpu_state == &cpu_state_ ); + cpu_state = &cpu_state_; + + cpu_state_.time = 0; + + for ( int i = 0; i < page_count + 1; ++i ) + set_code_page( i, unmapped ); + + memset( &r, 0, sizeof r ); + + blargg_verify_byte_order(); +} + +void Gb_Cpu::map_code( addr_t start, int size, void* data ) +{ + // address range must begin and end on page boundaries + require( start % page_size == 0 ); + require( size % page_size == 0 ); + require( start + size <= mem_size ); + + for ( int offset = 0; offset < size; offset += page_size ) + set_code_page( (start + offset) >> page_bits, STATIC_CAST(char*,data) + offset ); +} |