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 namespace PASOPIA7 {
  14
  15 void FLOPPY::initialize()
  16 {
  17         intr = false;
  18 }
  19
  20 void FLOPPY::write_io8(uint32_t addr, uint32_t data)
  21 {
  22         switch(addr & 0xff) {
  23         case 0xe0:
  24                 // tc off
  25                 d_fdc->write_signal(SIG_UPD765A_TC, 0, 1);
  26                 break;
  27         case 0xe2:
  28                 // tc on
  29                 d_fdc->write_signal(SIG_UPD765A_TC, 1, 1);
  30                 break;
  31         case 0xe6:
  32                 // fdc reset
  33                 if(data & 0x80) {
  34                         d_fdc->reset();
  35                 }
  36                 // motor on/off
  37                 d_fdc->write_signal(SIG_UPD765A_MOTOR, data, 0x40);
  38                 break;
  39         }
  40 }
  41
  42 uint32_t FLOPPY::read_io8(uint32_t addr)
  43 {
  44         switch(addr & 0xff) {
  45         case 0xe6:
  46                 // fdc intr
  47                 return intr ? 0x80 : 0;
  48         }
  49         return 0xff;
  50 }
  51
  52 void FLOPPY::write_signal(int id, uint32_t data, uint32_t mask)
  53 {
  54         if(id == SIG_FLOPPY_INTR) {
  55                 intr = ((data & mask) != 0);
  56         }
  57 }
  58
  59 #define STATE_VERSION   1
  60
  61 bool FLOPPY::process_state(FILEIO* state_fio, bool loading)
  62 {
  63         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  64                 return false;
  65         }
  66         if(!state_fio->StateCheckInt32(this_device_id)) {
  67                 return false;
  68         }
  69         state_fio->StateBool(intr);
  70         return true;
  71 }
  72
  73 }