source/src/vm/pc98ha/floppy.cpp

   1 /*
   2         NEC PC-98LT Emulator 'ePC-98LT'
   3         NEC PC-98HA Emulator 'eHANDY98'
   4
   5         Author : Takeda.Toshiya
   6         Date   : 2008.06.11 -
   7
   8         [ floppy ]
   9 */
  10
  11 #include "floppy.h"
  12 #include "../disk.h"
  13 #include "../upd765a.h"
  14
  15 namespace PC98HA {
  16
  17 void FLOPPY::reset()
  18 {
  19 /*
  20         for(int i = 0; i < 4; i++) {
  21                 d_fdc->set_drive_type(i, DRIVE_TYPE_2HD);
  22         }
  23 */
  24         ctrlreg = 0x80;
  25         modereg = 0x03;
  26 }
  27
  28 void FLOPPY::write_io8(uint32_t addr, uint32_t data)
  29 {
  30         switch(addr & 0xffff) {
  31         case 0xca:
  32                 d_fdc->write_io8(1, data);
  33                 break;
  34         case 0xcc:
  35                 if(!(ctrlreg & 0x80) && (data & 0x80)) {
  36                         d_fdc->reset();
  37                 }
  38                 d_fdc->write_signal(SIG_UPD765A_FREADY, data, 0x40);
  39                 d_fdc->write_signal(SIG_UPD765A_MOTOR, data, 0x08);
  40                 ctrlreg = data;
  41                 break;
  42         case 0xbe:
  43 /*
  44                 if(!(modereg & 2) && (data & 2)) {
  45                         d_fdc->set_drive_type(0, DRIVE_TYPE_2HD);
  46                         d_fdc->set_drive_type(1, DRIVE_TYPE_2HD);
  47                 } else if((modereg & 2) && !(data & 2)) {
  48                         d_fdc->set_drive_type(0, DRIVE_TYPE_2DD);
  49                         d_fdc->set_drive_type(1, DRIVE_TYPE_2DD);
  50                 }
  51 */
  52                 modereg = data;
  53                 break;
  54         }
  55 }
  56
  57 uint32_t FLOPPY::read_io8(uint32_t addr)
  58 {
  59         switch(addr & 0xffff) {
  60         case 0xc8:
  61                 return d_fdc->read_io8(0);
  62         case 0xca:
  63                 return d_fdc->read_io8(1);
  64         case 0xcc:
  65                 return (d_fdc->is_disk_inserted() ? 0x10 : 0) | 0x64;
  66         case 0xbe:
  67                 return (modereg & 0x03) | 0x08;
  68         }
  69         return addr & 0xff;
  70 }
  71
  72 #define STATE_VERSION   1
  73
  74 bool FLOPPY::process_state(FILEIO* state_fio, bool loading)
  75 {
  76         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  77                 return false;
  78         }
  79         if(!state_fio->StateCheckInt32(this_device_id)) {
  80                 return false;
  81         }
  82         state_fio->StateUint8(ctrlreg);
  83         state_fio->StateUint8(modereg);
  84         return true;
  85 }
  86
  87 }