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#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 )
dprintf( "Read from unmapped memory $%.4x\n", (unsigned) addr );
else if ( unsigned (addr - 0xFF01) < 0xFF80 - 0xFF01 )
dprintf( "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 )
// dprintf( "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 )
{
dprintf( "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 )
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