source/src/vm/pc9801/fmsound.cpp

   1 /*\r
   2         NEC PC-9801 Emulator 'ePC-9801'\r
   3         NEC PC-9801E/F/M Emulator 'ePC-9801E'\r
   4         NEC PC-98DO Emulator 'ePC-98DO'\r
   5 \r
   6         Author : Takeda.Toshiya\r
   7         Date   : 2012.02.03-\r
   8 \r
   9         [ PC-9801-26 ]\r
  10 */\r
  11 \r
  12 #include "fmsound.h"\r
  13 #include "../../fileio.h"\r
  14 \r
  15 // PC-98DO+\r
  16 #define BOARD_ID        0\r
  17 \r
  18 #ifdef HAS_YM2608\r
  19 void FMSOUND::reset()\r
  20 {\r
  21         mask = 0;\r
  22 }\r
  23 #endif\r
  24 \r
  25 void FMSOUND::write_io8(uint32 addr, uint32 data)\r
  26 {\r
  27         switch(addr & 0xffff) {\r
  28         case 0x188:\r
  29                 d_opn->write_io8(0, data);\r
  30                 break;\r
  31         case 0x18a:\r
  32                 d_opn->write_io8(1, data);\r
  33                 break;\r
  34 #ifdef HAS_YM2608\r
  35         case 0x18c:\r
  36                 if(mask & 1) {\r
  37                         d_opn->write_io8(2, data);\r
  38                 }\r
  39                 break;\r
  40         case 0x18e:\r
  41                 if(mask & 1) {\r
  42                         d_opn->write_io8(3, data);\r
  43                 }\r
  44                 break;\r
  45         case 0xa460:\r
  46                 mask = data;\r
  47                 break;\r
  48 #endif\r
  49         }\r
  50 }\r
  51 \r
  52 uint32 FMSOUND::read_io8(uint32 addr)\r
  53 {\r
  54         switch(addr & 0xffff) {\r
  55         case 0x188:\r
  56                 return d_opn->read_io8(0);\r
  57         case 0x18a:\r
  58                 return d_opn->read_io8(1);\r
  59 #ifdef HAS_YM2608\r
  60         case 0x18c:\r
  61                 if(mask & 1) {\r
  62                         return d_opn->read_io8(2);\r
  63                 }\r
  64                 break;\r
  65         case 0x18e:\r
  66                 if(mask & 1) {\r
  67                         return d_opn->read_io8(3);\r
  68                 }\r
  69                 break;\r
  70         case 0xa460:\r
  71                 return BOARD_ID | (mask & 3);\r
  72 #endif\r
  73         }\r
  74         return 0xff;\r
  75 }\r
  76 \r
  77 #ifdef HAS_YM2608\r
  78 #define STATE_VERSION   1\r
  79 \r
  80 void FMSOUND::save_state(FILEIO* state_fio)\r
  81 {\r
  82         state_fio->FputUint32(STATE_VERSION);\r
  83         state_fio->FputInt32(this_device_id);\r
  84         \r
  85         state_fio->FputUint8(mask);\r
  86 }\r
  87 \r
  88 bool FMSOUND::load_state(FILEIO* state_fio)\r
  89 {\r
  90         if(state_fio->FgetUint32() != STATE_VERSION) {\r
  91                 return false;\r
  92         }\r
  93         if(state_fio->FgetInt32() != this_device_id) {\r
  94                 return false;\r
  95         }\r
  96         mask = state_fio->FgetUint8();\r
  97         return true;\r
  98 }\r
  99 #endif\r
 100 \r