source/src/vm/m23/beep.cpp

   1 /*
   2         SORD M23 Emulator 'Emu23'
   3         SORD M68 Emulator 'Emu68'
   4
   5         Author : Takeda.Toshiya
   6         Date   : 2022.05.21-
   7
   8         [ beep ]
   9 */
  10
  11 #include "./beep.h"
  12
  13 namespace M23 {
  14 void BEEP::initialize()
  15 {
  16         PCM1BIT::initialize();
  17         reg = 0;
  18 }
  19
  20 void BEEP::write_io8(uint32_t addr, uint32_t data)
  21 {
  22         switch(addr & 0xff) {
  23         case 0xd3:
  24                 reg ^= 1;
  25                 PCM1BIT::write_signal(SIG_PCM1BIT_SIGNAL, reg, 1);
  26                 break;
  27         }
  28 }
  29
  30 uint32_t BEEP::read_io8(uint32_t addr)
  31 {
  32         switch(addr & 0xff) {
  33         case 0xd3:
  34                 reg ^= 1;
  35                 PCM1BIT::write_signal(SIG_PCM1BIT_SIGNAL, reg, 1);
  36                 return reg;
  37         }
  38         return 0xff;
  39 }
  40
  41 #define STATE_VERSION   1
  42
  43 bool BEEP::process_state(FILEIO* state_fio, bool loading)
  44 {
  45         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  46                 return false;
  47         }
  48         if(!state_fio->StateCheckInt32(this_device_id)) {
  49                 return false;
  50         }
  51         if(!PCM1BIT::process_state(state_fio, loading)) {
  52                 return false;
  53         }
  54         state_fio->StateValue(reg);
  55         return true;
  56 }
  57 }