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#include "Hes_Emu.h"
#include "blargg_source.h"
int Hes_Emu::cpu_read( hes_addr_t addr )
{
check( addr <= 0xFFFF );
int result = *cpu::get_code( addr );
if ( mmr [addr >> page_shift] == 0xFF )
result = cpu_read_( addr );
return result;
}
void Hes_Emu::cpu_write( hes_addr_t addr, int data )
{
check( addr <= 0xFFFF );
byte* out = write_pages [addr >> page_shift];
addr &= page_size - 1;
if ( out )
out [addr] = data;
else if ( mmr [addr >> page_shift] == 0xFF )
cpu_write_( addr, data );
}
inline byte const* Hes_Emu::cpu_set_mmr( int page, int bank )
{
write_pages [page] = 0;
if ( bank < 0x80 )
return rom.at_addr( bank * (blargg_long) page_size );
byte* data = 0;
switch ( bank )
{
case 0xF8:
data = cpu::ram;
break;
case 0xF9:
case 0xFA:
case 0xFB:
data = &sgx [(bank - 0xF9) * page_size];
break;
default:
if ( bank != 0xFF )
debug_printf( "Unmapped bank $%02X\n", bank );
return rom.unmapped();
}
write_pages [page] = data;
return data;
}
#define CPU_READ_FAST( cpu, addr, time, out ) \
CPU_READ_FAST_( STATIC_CAST(Hes_Emu*,cpu), addr, time, out )
#define CPU_READ_FAST_( cpu, addr, time, out ) \
{\
out = READ_PROG( addr );\
if ( mmr [addr >> page_shift] == 0xFF )\
{\
FLUSH_TIME();\
out = cpu->cpu_read_( addr );\
CACHE_TIME();\
}\
}
#define CPU_WRITE_FAST( cpu, addr, data, time ) \
CPU_WRITE_FAST_( STATIC_CAST(Hes_Emu*,cpu), addr, data, time )
#define CPU_WRITE_FAST_( cpu, addr, data, time ) \
{\
byte* out = cpu->write_pages [addr >> page_shift];\
addr &= page_size - 1;\
if ( out )\
{\
out [addr] = data;\
}\
else if ( mmr [addr >> page_shift] == 0xFF )\
{\
FLUSH_TIME();\
cpu->cpu_write_( addr, data );\
CACHE_TIME();\
}\
}
#define CPU_READ( cpu, addr, time ) \
STATIC_CAST(Hes_Emu*,cpu)->cpu_read( addr )
#define CPU_WRITE( cpu, addr, data, time ) \
STATIC_CAST(Hes_Emu*,cpu)->cpu_write( addr, data )
#define CPU_WRITE_VDP( cpu, addr, data, time ) \
STATIC_CAST(Hes_Emu*,cpu)->cpu_write_vdp( addr, data )
#define CPU_SET_MMR( cpu, page, bank ) \
STATIC_CAST(Hes_Emu*,cpu)->cpu_set_mmr( page, bank )
#define CPU_DONE( cpu, time, result_out ) \
result_out = STATIC_CAST(Hes_Emu*,cpu)->cpu_done()
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