source/src/vm/multi8/floppy.cpp

   1 /*
   2         MITSUBISHI Electric MULTI8 Emulator 'EmuLTI8'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2006.09.17 -
   6
   7         [ floppy ]
   8 */
   9
  10 #include "floppy.h"
  11 #include "../upd765a.h"
  12 #include "../../fileio.h"
  13
  14 void FLOPPY::write_io8(uint32 addr, uint32 data)
  15 {
  16         switch(addr & 0xff) {
  17         case 0x72:
  18                 // data register + dack
  19                 d_fdc->write_dma_io8(addr, data);
  20                 break;
  21         case 0x73:
  22                 // motor on/off
  23                 d_fdc->write_signal(SIG_UPD765A_MOTOR, data, 1);
  24                 break;
  25         case 0x74:
  26                 // tc on
  27                 d_fdc->write_signal(SIG_UPD765A_TC, 1, 1);
  28                 break;
  29         }
  30 }
  31
  32 uint32 FLOPPY::read_io8(uint32 addr)
  33 {
  34         switch(addr & 0xff) {
  35         case 0x72:
  36                 // data register + dack
  37                 return d_fdc->read_dma_io8(addr);
  38         case 0x73:
  39                 return drq ? 0xff : 0x7f;
  40         }
  41         return 0xff;
  42 }
  43
  44 void FLOPPY::write_signal(int id, uint32 data, uint32 mask)
  45 {
  46         drq = ((data & mask) != 0);
  47 }
  48
  49 #define STATE_VERSION   1
  50
  51 void FLOPPY::save_state(FILEIO* state_fio)
  52 {
  53         state_fio->FputUint32(STATE_VERSION);
  54         state_fio->FputInt32(this_device_id);
  55
  56         state_fio->FputBool(drq);
  57 }
  58
  59 bool FLOPPY::load_state(FILEIO* state_fio)
  60 {
  61         if(state_fio->FgetUint32() != STATE_VERSION) {
  62                 return false;
  63         }
  64         if(state_fio->FgetInt32() != this_device_id) {
  65                 return false;
  66         }
  67         drq = state_fio->FgetBool();
  68         return true;
  69 }
  70