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
  13 void FLOPPY::write_io8(uint32_t addr, uint32_t data)
  14 {
  15         switch(addr & 0xff) {
  16         case 0x72:
  17                 // data register + dack
  18                 d_fdc->write_dma_io8(addr, data);
  19                 break;
  20         case 0x73:
  21                 // motor on/off
  22                 d_fdc->write_signal(SIG_UPD765A_MOTOR, data, 1);
  23                 break;
  24         case 0x74:
  25                 // tc on
  26                 d_fdc->write_signal(SIG_UPD765A_TC, 1, 1);
  27                 break;
  28         }
  29 }
  30
  31 uint32_t FLOPPY::read_io8(uint32_t addr)
  32 {
  33         switch(addr & 0xff) {
  34         case 0x72:
  35                 // data register + dack
  36                 return d_fdc->read_dma_io8(addr);
  37         case 0x73:
  38                 return drq ? 0xff : 0x7f;
  39         }
  40         return 0xff;
  41 }
  42
  43 void FLOPPY::write_signal(int id, uint32_t data, uint32_t mask)
  44 {
  45         drq = ((data & mask) != 0);
  46 }
  47
  48 #define STATE_VERSION   1
  49
  50 #include "../../statesub.h"
  51
  52 void FLOPPY::decl_state()
  53 {
  54         enter_decl_state(STATE_VERSION);
  55
  56         DECL_STATE_ENTRY_BOOL(drq);
  57
  58         leave_decl_state();
  59 }
  60 void FLOPPY::save_state(FILEIO* state_fio)
  61 {
  62         if(state_entry != NULL) {
  63                 state_entry->save_state(state_fio);
  64         }
  65 //      state_fio->FputUint32(STATE_VERSION);
  66 //      state_fio->FputInt32(this_device_id);
  67
  68 //      state_fio->FputBool(drq);
  69 }
  70
  71 bool FLOPPY::load_state(FILEIO* state_fio)
  72 {
  73         bool mb = false;
  74         if(state_entry != NULL) {
  75                 mb = state_entry->load_state(state_fio);
  76         }
  77         if(!mb) {
  78                 return false;
  79         }
  80 //      if(state_fio->FgetUint32() != STATE_VERSION) {
  81 //              return false;
  82 //      }
  83 //      if(state_fio->FgetInt32() != this_device_id) {
  84 //              return false;
  85 //      }
  86 //      drq = state_fio->FgetBool();
  87         return true;
  88 }
  89
  90 bool FLOPPY::process_state(FILEIO* state_fio, bool loading)
  91 {
  92         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  93                 return false;
  94         }
  95         if(!state_fio->StateCheckInt32(this_device_id)) {
  96                 return false;
  97         }
  98         state_fio->StateBool(drq);
  99         return true;
 100 }