text: 
  #include "Gbs_Emu.h"
  
  #include "blargg_source.h"
  
  int Gbs_Emu::cpu_read( gb_addr_t addr )
  {
  	int result = *cpu::get_code( addr );
  	if ( unsigned (addr - Gb_Apu::start_addr) < Gb_Apu::register_count )
  		result = apu.read_register( clock(), addr );
  #ifndef NDEBUG
  	else if ( unsigned (addr - 0x8000) < 0x2000 || unsigned (addr - 0xE000) < 0x1F00 )
  		debug_printf( "Read from unmapped memory $%.4x\n", (unsigned) addr );
  	else if ( unsigned (addr - 0xFF01) < 0xFF80 - 0xFF01 )
  		debug_printf( "Unhandled I/O read 0x%4X\n", (unsigned) addr );
  #endif
  	return result;
  }
  
  void Gbs_Emu::cpu_write( gb_addr_t addr, int data )
  {
  	unsigned offset = addr - ram_addr;
  	if ( offset <= 0xFFFF - ram_addr )
  	{
  		ram [offset] = data;
  		if ( (addr ^ 0xE000) <= 0x1F80 - 1 )
  		{
  			if ( unsigned (addr - Gb_Apu::start_addr) < Gb_Apu::register_count )
  			{
  				GME_APU_HOOK( this, addr - Gb_Apu::start_addr, data );
  				apu.write_register( clock(), addr, data );
  			}
  			else if ( (addr ^ 0xFF06) < 2 )
  				update_timer();
  			else if ( addr == joypad_addr )
  				ram [offset] = 0; // keep joypad return value 0
  			else
  				ram [offset] = 0xFF;
  
  			//if ( addr == 0xFFFF )
  			//  debug_printf( "Wrote interrupt mask\n" );
  		}
  	}
  	else if ( (addr ^ 0x2000) <= 0x2000 - 1 )
  	{
  		set_bank( data );
  	}
  #ifndef NDEBUG
  	else if ( unsigned (addr - 0x8000) < 0x2000 || unsigned (addr - 0xE000) < 0x1F00 )
  	{
  		debug_printf( "Wrote to unmapped memory $%.4x\n", (unsigned) addr );
  	}
  #endif
  }
  
  #define CPU_READ_FAST( cpu, addr, time, out ) \
  	CPU_READ_FAST_( STATIC_CAST(Gbs_Emu*,cpu), addr, time, out )
  
  #define CPU_READ_FAST_( emu, addr, time, out ) \
  {\
  	out = READ_PROG( addr );\
  	if ( unsigned (addr - Gb_Apu::start_addr) <= Gb_Apu::register_count )\
  		out = emu->apu.read_register( emu->cpu_time - time * clocks_per_instr, addr );\
  	else\
  		check( out == emu->cpu_read( addr ) );\
  }
  
  #define CPU_READ( cpu, addr, time ) \
  	STATIC_CAST(Gbs_Emu*,cpu)->cpu_read( addr )
  
  #define CPU_WRITE( cpu, addr, data, time ) \
  	STATIC_CAST(Gbs_Emu*,cpu)->cpu_write( addr, data )
  