source/src/vm/pasopia/floppy.cpp

   1 /*
   2         TOSHIBA PASOPIA Emulator 'EmuPIA'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2012.03.01 -
   6
   7         [ floppy ]
   8 */
   9
  10 #include "floppy.h"
  11 #include "../upd765a.h"
  12
  13 namespace PASOPIA {
  14
  15 void FLOPPY::initialize()
  16 {
  17         intr = false;
  18 }
  19
  20 void FLOPPY::write_io8(uint32_t addr, uint32_t data)
  21 {
  22         if(!supported) {
  23                 // OA-BASIC without floppy drives
  24                 return;
  25         }
  26
  27         switch(addr & 0xff) {
  28         case 0xe0:
  29                 // tc off
  30                 d_fdc->write_signal(SIG_UPD765A_TC, 0, 1);
  31                 break;
  32         case 0xe2:
  33                 // tc on
  34                 d_fdc->write_signal(SIG_UPD765A_TC, 1, 1);
  35                 break;
  36         case 0xe4:
  37         case 0xe5:
  38                 d_fdc->write_io8(addr, data);
  39                 break;
  40         case 0xe6:
  41                 // fdc reset
  42                 if(data & 0x80) {
  43                         d_fdc->reset();
  44                 }
  45                 // motor on/off
  46                 d_fdc->write_signal(SIG_UPD765A_MOTOR, data, 0x40);
  47                 break;
  48         }
  49 }
  50
  51 uint32_t FLOPPY::read_io8(uint32_t addr)
  52 {
  53         if(!supported) {
  54                 // OA-BASIC without floppy drives
  55                 return 0xff;
  56         }
  57
  58         switch(addr & 0xff) {
  59         case 0xe4:
  60         case 0xe5:
  61                 return d_fdc->read_io8(addr);
  62         case 0xe6:
  63                 // fdc intr
  64                 return intr ? 0x80 : 0;
  65         }
  66         return 0xff;
  67 }
  68
  69 void FLOPPY::write_signal(int id, uint32_t data, uint32_t mask)
  70 {
  71         if(id == SIG_FLOPPY_INTR) {
  72                 intr = ((data & mask) != 0);
  73         }
  74 }
  75
  76 #define STATE_VERSION   1
  77
  78 bool FLOPPY::process_state(FILEIO* state_fio, bool loading)
  79 {
  80         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  81                 return false;
  82         }
  83         if(!state_fio->StateCheckInt32(this_device_id)) {
  84                 return false;
  85         }
  86         state_fio->StateValue(intr);
  87         state_fio->StateValue(supported);
  88         return true;
  89 }
  90
  91 }