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 #ifdef SUPPORT_PC98_OPNA
  26 void FMSOUND::reset()
  27 {
  28         mask = 0;
  29 }
  30 #endif
  31
  32 void FMSOUND::write_io8(uint32_t addr, uint32_t data)
  33 {
  34         switch(addr) {
  35         case 0x0188:
  36                 d_opn->write_io8(0, data);
  37                 break;
  38         case 0x018a:
  39                 d_opn->write_io8(1, data);
  40                 break;
  41 #ifdef SUPPORT_PC98_OPNA
  42         case 0x018c:
  43                 if(mask & 1) {
  44                         d_opn->write_io8(2, data);
  45                 }
  46                 break;
  47         case 0x018e:
  48                 if(mask & 1) {
  49                         d_opn->write_io8(3, data);
  50                 }
  51                 break;
  52         case 0xa460:
  53                 mask = data;
  54                 break;
  55 #endif
  56         }
  57 }
  58
  59 uint32_t FMSOUND::read_io8(uint32_t addr)
  60 {
  61         switch(addr) {
  62         case 0x0188:
  63                 return d_opn->read_io8(0);
  64         case 0x018a:
  65                 return d_opn->read_io8(1);
  66 #ifdef SUPPORT_PC98_OPNA
  67         case 0x018c:
  68                 if(mask & 1) {
  69                         return d_opn->read_io8(2);
  70                 }
  71                 break;
  72         case 0x018e:
  73                 if(mask & 1) {
  74                         return d_opn->read_io8(3);
  75                 }
  76                 break;
  77         case 0xa460:
  78                 return BOARD_ID | (mask & 3);
  79 #endif
  80         }
  81         return 0xff;
  82 }
  83
  84 #ifdef SUPPORT_PC98_OPNA
  85 #define STATE_VERSION   1
  86
  87 bool FMSOUND::process_state(FILEIO* state_fio, bool loading)
  88 {
  89         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  90                 return false;
  91         }
  92         if(!state_fio->StateCheckInt32(this_device_id)) {
  93                 return false;
  94         }
  95         state_fio->StateUint8(mask);
  96         return true;
  97 }
  98 #endif
  99