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-98RL Emulator 'ePC-98RL'
  10         NEC PC-98DO Emulator 'ePC-98DO'
  11
  12         Author : Takeda.Toshiya
  13         Date   : 2012.02.03-
  14
  15         [ PC-9801-26 ]
  16 */
  17
  18 #include "fmsound.h"
  19
  20 // PC-98DO+
  21 #define BOARD_ID        0
  22
  23 #ifdef SUPPORT_PC98_OPNA
  24 void FMSOUND::reset()
  25 {
  26         mask = 0;
  27 }
  28 #endif
  29
  30 void FMSOUND::write_io8(uint32_t addr, uint32_t data)
  31 {
  32         switch(addr) {
  33         case 0x0188:
  34                 d_opn->write_io8(0, data);
  35                 break;
  36         case 0x018a:
  37                 d_opn->write_io8(1, data);
  38                 break;
  39 #ifdef SUPPORT_PC98_OPNA
  40         case 0x018c:
  41                 if(mask & 1) {
  42                         d_opn->write_io8(2, data);
  43                 }
  44                 break;
  45         case 0x018e:
  46                 if(mask & 1) {
  47                         d_opn->write_io8(3, data);
  48                 }
  49                 break;
  50         case 0xa460:
  51                 mask = data;
  52                 break;
  53 #endif
  54         }
  55 }
  56
  57 uint32_t FMSOUND::read_io8(uint32_t addr)
  58 {
  59         switch(addr) {
  60         case 0x0188:
  61                 return d_opn->read_io8(0);
  62         case 0x018a:
  63                 return d_opn->read_io8(1);
  64 #ifdef SUPPORT_PC98_OPNA
  65         case 0x018c:
  66                 if(mask & 1) {
  67                         return d_opn->read_io8(2);
  68                 }
  69                 break;
  70         case 0x018e:
  71                 if(mask & 1) {
  72                         return d_opn->read_io8(3);
  73                 }
  74                 break;
  75         case 0xa460:
  76                 return BOARD_ID | (mask & 3);
  77 #endif
  78         }
  79         return 0xff;
  80 }
  81
  82 #ifdef SUPPORT_PC98_OPNA
  83 #define STATE_VERSION   1
  84
  85 void FMSOUND::save_state(FILEIO* state_fio)
  86 {
  87         state_fio->FputUint32(STATE_VERSION);
  88         state_fio->FputInt32(this_device_id);
  89
  90         state_fio->FputUint8(mask);
  91 }
  92
  93 bool FMSOUND::load_state(FILEIO* state_fio)
  94 {
  95         if(state_fio->FgetUint32() != STATE_VERSION) {
  96                 return false;
  97         }
  98         if(state_fio->FgetInt32() != this_device_id) {
  99                 return false;
 100         }
 101         mask = state_fio->FgetUint8();
 102         return true;
 103 }
 104 #endif
 105