source/src/vm/pasopia7/floppy.cpp

   1 /*
   2         TOSHIBA PASOPIA 7 Emulator 'EmuPIA7'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2006.09.20 -
   6
   7         [ floppy ]
   8 */
   9
  10 #include "floppy.h"
  11 #include "../upd765a.h"
  12
  13 void FLOPPY::initialize()
  14 {
  15         intr = false;
  16 }
  17
  18 void FLOPPY::write_io8(uint32_t addr, uint32_t data)
  19 {
  20         switch(addr & 0xff) {
  21         case 0xe0:
  22                 // tc off
  23                 d_fdc->write_signal(SIG_UPD765A_TC, 0, 1);
  24                 break;
  25         case 0xe2:
  26                 // tc on
  27                 d_fdc->write_signal(SIG_UPD765A_TC, 1, 1);
  28                 break;
  29         case 0xe6:
  30                 // fdc reset
  31                 if(data & 0x80) {
  32                         d_fdc->reset();
  33                 }
  34                 // motor on/off
  35                 d_fdc->write_signal(SIG_UPD765A_MOTOR, data, 0x40);
  36                 break;
  37         }
  38 }
  39
  40 uint32_t FLOPPY::read_io8(uint32_t addr)
  41 {
  42         switch(addr & 0xff) {
  43         case 0xe6:
  44                 // fdc intr
  45                 return intr ? 0x80 : 0;
  46         }
  47         return 0xff;
  48 }
  49
  50 void FLOPPY::write_signal(int id, uint32_t data, uint32_t mask)
  51 {
  52         if(id == SIG_FLOPPY_INTR) {
  53                 intr = ((data & mask) != 0);
  54         }
  55 }
  56
  57 #define STATE_VERSION   1
  58
  59 bool FLOPPY::process_state(FILEIO* state_fio, bool loading)
  60 {
  61         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  62                 return false;
  63         }
  64         if(!state_fio->StateCheckInt32(this_device_id)) {
  65                 return false;
  66         }
  67         state_fio->StateBool(intr);
  68         return true;
  69 }