source/src/vm/pv1000/joystick.cpp

   1 /*
   2         CASIO PV-1000 Emulator 'ePV-1000'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2006.11.16 -
   6
   7         [ joystick ]
   8 */
   9
  10 #include "./joystick.h"
  11
  12 void JOYSTICK::initialize()
  13 {
  14         key = emu->get_key_buffer();
  15         joy = emu->get_joy_buffer();
  16
  17         // register event to interrupt
  18         register_frame_event(this);
  19 }
  20
  21 void JOYSTICK::reset()
  22 {
  23         status = 0;
  24 }
  25
  26 void JOYSTICK::write_io8(uint32_t addr, uint32_t data)
  27 {
  28         switch(addr & 0xff) {
  29         case 0xfc:
  30 //              status = data;
  31                 break;
  32         case 0xfd:
  33                 column = data;
  34                 status |= 2;
  35                 break;
  36         }
  37 //      this->out_debug_log(_T("OUT\t%2x, %2x\n"), addr & 0xff, data);
  38 }
  39
  40 uint32_t JOYSTICK::read_io8(uint32_t addr)
  41 {
  42         uint32_t val = 0xff;
  43
  44         switch(addr & 0xff) {
  45         case 0xfc:
  46                 val = status;
  47                 status &= ~1;
  48                 break;
  49         case 0xfd:
  50                 val = 0;
  51                 if(column & 1) {
  52                         if(joy[0] & 0x40) val |= 1;     // #1 select
  53                         if(joy[0] & 0x80) val |= 2;     // #1 start
  54                         if(joy[1] & 0x40) val |= 4;     // #2 select
  55                         if(joy[1] & 0x80) val |= 8;     // #2 start
  56                 }
  57                 if(column & 2) {
  58                         if(joy[0] & 0x02) val |= 1;     // #1 down
  59                         if(joy[0] & 0x08) val |= 2;     // #1 right
  60                         if(joy[1] & 0x02) val |= 4;     // #2 down
  61                         if(joy[1] & 0x08) val |= 8;     // #2 right
  62                 }
  63                 if(column & 4) {
  64                         if(joy[0] & 0x04) val |= 1;     // #1 left
  65                         if(joy[0] & 0x01) val |= 2;     // #1 up
  66                         if(joy[1] & 0x04) val |= 4;     // #2 left
  67                         if(joy[1] & 0x01) val |= 8;     // #2 up
  68                 }
  69                 if(column & 8) {
  70                         if(joy[0] & 0x10) val |= 1;     // #1 trig1
  71                         if(joy[0] & 0x20) val |= 2;     // #1 trig2
  72                         if(joy[1] & 0x10) val |= 4;     // #2 trig1
  73                         if(joy[1] & 0x20) val |= 8;     // #2 trig2
  74                 }
  75 //              status &= ~2;
  76                 break;
  77         }
  78 //      this->out_debug_log(_T("IN\t%2x, %2x\n"), addr & 0xff, val);
  79         return val;
  80 }
  81
  82 void JOYSTICK::event_frame()
  83 {
  84         status |= 1;
  85 }
  86
  87 #define STATE_VERSION   1
  88
  89 bool JOYSTICK::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(column);
  98         state_fio->StateUint8(status);
  99         return true;
 100 }