source/src/vm/mz2800/joystick.cpp

   1 /*
   2         SHARP MZ-2800 Emulator 'EmuZ-2800'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2007.08.14 -
   6
   7         [ joystick ]
   8 */
   9
  10 #include "joystick.h"
  11
  12 void JOYSTICK::initialize()
  13 {
  14         mode = 0xf;
  15         joy_stat = emu->get_joy_buffer();
  16 }
  17
  18 void JOYSTICK::write_io8(uint32_t addr, uint32_t data)
  19 {
  20         mode = data;
  21 }
  22
  23 uint32_t JOYSTICK::read_io8(uint32_t addr)
  24 {
  25         uint32_t val = 0x3f;
  26         int num = (mode & 0x40) ? 1 : 0;
  27         bool dir = true;
  28
  29         // trigger mask
  30         if(num) {
  31                 if(!(mode & 0x04)) val &= ~0x20;
  32                 if(!(mode & 0x08)) val &= ~0x10;
  33                 dir = ((mode & 0x20) == 0);
  34         } else {
  35                 if(!(mode & 0x01)) val &= ~0x20;
  36                 if(!(mode & 0x02)) val &= ~0x10;
  37                 dir = ((mode & 0x10) == 0);
  38         }
  39
  40         // direction
  41         if(dir) {
  42                 if(joy_stat[num] & 0x08) val &= ~0x08;
  43                 if(joy_stat[num] & 0x04) val &= ~0x04;
  44                 if(joy_stat[num] & 0x02) val &= ~0x02;
  45                 if(joy_stat[num] & 0x01) val &= ~0x01;
  46         }
  47
  48         // trigger
  49         if(joy_stat[num] & 0x10) val &= ~0x20;
  50         if(joy_stat[num] & 0x20) val &= ~0x10;
  51         return val;
  52 }
  53
  54 #define STATE_VERSION   2
  55
  56 #include "../../statesub.h"
  57
  58 void JOYSTICK::decl_state()
  59 {
  60         enter_decl_state(STATE_VERSION);
  61
  62         DECL_STATE_ENTRY_UINT32(mode);
  63
  64         leave_decl_state();
  65 }
  66
  67 void JOYSTICK::save_state(FILEIO* state_fio)
  68 {
  69         if(state_entry != NULL) {
  70                 state_entry->save_state(state_fio);
  71         }
  72 //      state_fio->FputUint32(STATE_VERSION);
  73 //      state_fio->FputInt32(this_device_id);
  74
  75 //      state_fio->FputUint32(mode);
  76 }
  77
  78 bool JOYSTICK::load_state(FILEIO* state_fio)
  79 {
  80         bool mb = false;
  81         if(state_entry != NULL) {
  82                 mb = state_entry->load_state(state_fio);
  83         }
  84         if(!mb) {
  85                 return false;
  86         }
  87 //      if(state_fio->FgetUint32() != STATE_VERSION) {
  88 //              return false;
  89 //      }
  90 //      if(state_fio->FgetInt32() != this_device_id) {
  91 //              return false;
  92 //      }
  93 //      mode = state_fio->FgetUint32();
  94         return true;
  95 }
  96