hes_cpu_io.h

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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()