apps/codecs/libgme/hes_cpu_io.h

   1
   2 #include "hes_emu.h"
   3
   4 #include "blargg_source.h"
   5
   6 int Cpu_read( struct Hes_Emu* this, hes_addr_t addr )
   7 {
   8         check( addr <= 0xFFFF );
   9         int result = *Cpu_get_code( &this->cpu, addr );
  10         if ( this->cpu.mmr [addr >> page_shift] == 0xFF )
  11                 result = Emu_cpu_read( this, addr );
  12         return result;
  13 }
  14
  15 void Cpu_write( struct Hes_Emu* this, hes_addr_t addr, int data )
  16 {
  17         check( addr <= 0xFFFF );
  18         byte* out = this->write_pages [addr >> page_shift];
  19         addr &= page_size - 1;
  20         if ( out )
  21                 out [addr] = data;
  22         else if ( this->cpu.mmr [addr >> page_shift] == 0xFF )
  23                 Emu_cpu_write( this, addr, data );
  24 }
  25
  26 #define CPU_READ_FAST( emu, addr, time, out ) \
  27         CPU_READ_FAST_( emu, addr, time, out )
  28
  29 #define CPU_READ_FAST_( emu, addr, time, out ) \
  30 {\
  31         out = READ_PROG( addr );\
  32         if ( emu->cpu.mmr [addr >> page_shift] == 0xFF )\
  33         {\
  34                 FLUSH_TIME();\
  35                 out = Emu_cpu_read( emu, addr );\
  36                 CACHE_TIME();\
  37         }\
  38 }
  39
  40 #define CPU_WRITE_FAST( emu, addr, data, time ) \
  41         CPU_WRITE_FAST_( emu, addr, data, time )
  42
  43 #define CPU_WRITE_FAST_( emu, addr, data, time ) \
  44 {\
  45         byte* out = emu->write_pages [addr >> page_shift];\
  46         addr &= page_size - 1;\
  47         if ( out )\
  48         {\
  49                 out [addr] = data;\
  50         }\
  51         else if ( emu->cpu.mmr [addr >> page_shift] == 0xFF )\
  52         {\
  53                 FLUSH_TIME();\
  54                 Emu_cpu_write( emu, addr, data );\
  55                 CACHE_TIME();\
  56         }\
  57 }
  58
  59 #define CPU_READ( emu, addr, time ) \
  60         Cpu_read( emu, addr )
  61
  62 #define CPU_WRITE( emu, addr, data, time ) \
  63         Cpu_write( emu, addr, data )
  64
  65 #define CPU_WRITE_VDP( emu, addr, data, time ) \
  66         Cpu_write_vdp( emu, addr, data )
  67
  68 #define CPU_SET_MMR( emu, page, bank ) \
  69         Emu_cpu_set_mmr( emu, page, bank )
  70
  71 #define CPU_DONE( emu, time, result_out ) \
  72         result_out = Cpu_done( emu )