source/src/vm/pc9801/fmsound.cpp

   1 /*
   2         NEC PC-9801 Emulator 'ePC-9801'
   3         NEC PC-9801E/F/M Emulator 'ePC-9801E'
   4         NEC PC-9801U Emulator 'ePC-9801U'
   5         NEC PC-9801VF Emulator 'ePC-9801VF'
   6         NEC PC-9801VM Emulator 'ePC-9801VM'
   7         NEC PC-9801VX Emulator 'ePC-9801VX'
   8         NEC PC-9801RA Emulator 'ePC-9801RA'
   9         NEC PC-98XA Emulator 'ePC-98XA'
  10         NEC PC-98XL Emulator 'ePC-98XL'
  11         NEC PC-98RL Emulator 'ePC-98RL'
  12         NEC PC-98DO Emulator 'ePC-98DO'
  13
  14         Author : Takeda.Toshiya
  15         Date   : 2012.02.03-
  16
  17         [ PC-9801-26 ]
  18 */
  19
  20 #include "fmsound.h"
  21
  22 // PC-98DO+
  23 #define BOARD_ID        0
  24
  25 namespace PC9801 {
  26
  27 #ifdef SUPPORT_PC98_OPNA
  28 void FMSOUND::reset()
  29 {
  30         mask = 0;
  31 }
  32 #endif
  33
  34 void FMSOUND::write_io8(uint32_t addr, uint32_t data)
  35 {
  36         switch(addr) {
  37         case 0x0188:
  38                 d_opn->write_io8(0, data);
  39                 break;
  40         case 0x018a:
  41                 d_opn->write_io8(1, data);
  42                 break;
  43 #ifdef SUPPORT_PC98_OPNA
  44         case 0x018c:
  45                 if(mask & 1) {
  46                         d_opn->write_io8(2, data);
  47                 }
  48                 break;
  49         case 0x018e:
  50                 if(mask & 1) {
  51                         d_opn->write_io8(3, data);
  52                 }
  53                 break;
  54         case 0xa460:
  55                 mask = data;
  56                 break;
  57 #endif
  58         }
  59 }
  60
  61 uint32_t FMSOUND::read_io8(uint32_t addr)
  62 {
  63         switch(addr) {
  64         case 0x0188:
  65                 return d_opn->read_io8(0);
  66         case 0x018a:
  67                 return d_opn->read_io8(1);
  68 #ifdef SUPPORT_PC98_OPNA
  69         case 0x018c:
  70                 if(mask & 1) {
  71                         return d_opn->read_io8(2);
  72                 }
  73                 break;
  74         case 0x018e:
  75                 if(mask & 1) {
  76                         return d_opn->read_io8(3);
  77                 }
  78                 break;
  79         case 0xa460:
  80                 return BOARD_ID | (mask & 3);
  81 #endif
  82         }
  83         return 0xff;
  84 }
  85
  86 #ifdef SUPPORT_PC98_OPNA
  87 #define STATE_VERSION   1
  88
  89 bool FMSOUND::process_state(FILEIO* state_fio, bool loading)
  90 {
  91         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  92                 return false;
  93         }
  94         if(!state_fio->StateCheckInt32(this_device_id)) {
  95                 return false;
  96         }
  97         state_fio->StateUint8(mask);
  98         return true;
  99 }
 100 #endif
 101
 102 }