diff options
Diffstat (limited to 'gme/hes_cpu_io.h')
-rw-r--r-- | gme/hes_cpu_io.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/gme/hes_cpu_io.h b/gme/hes_cpu_io.h new file mode 100644 index 00000000..b3d71dad --- /dev/null +++ b/gme/hes_cpu_io.h @@ -0,0 +1,101 @@ + +#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 ) + dprintf( "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() |