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 void FLOPPY::reset()
  16 {
  17 /*
  18         for(int i = 0; i < 4; i++) {
  19                 d_fdc->set_drive_type(i, DRIVE_TYPE_2HD);
  20         }
  21 */
  22         ctrlreg = 0x80;
  23         modereg = 0x03;
  24 }
  25
  26 void FLOPPY::write_io8(uint32_t addr, uint32_t data)
  27 {
  28         switch(addr & 0xffff) {
  29         case 0xca:
  30                 d_fdc->write_io8(1, data);
  31                 break;
  32         case 0xcc:
  33                 if(!(ctrlreg & 0x80) && (data & 0x80)) {
  34                         d_fdc->reset();
  35                 }
  36                 d_fdc->write_signal(SIG_UPD765A_FREADY, data, 0x40);
  37                 d_fdc->write_signal(SIG_UPD765A_MOTOR, data, 0x08);
  38                 ctrlreg = data;
  39                 break;
  40         case 0xbe:
  41 /*
  42                 if(!(modereg & 2) && (data & 2)) {
  43                         d_fdc->set_drive_type(0, DRIVE_TYPE_2HD);
  44                         d_fdc->set_drive_type(1, DRIVE_TYPE_2HD);
  45                 } else if((modereg & 2) && !(data & 2)) {
  46                         d_fdc->set_drive_type(0, DRIVE_TYPE_2DD);
  47                         d_fdc->set_drive_type(1, DRIVE_TYPE_2DD);
  48                 }
  49 */
  50                 modereg = data;
  51                 break;
  52         }
  53 }
  54
  55 uint32_t FLOPPY::read_io8(uint32_t addr)
  56 {
  57         switch(addr & 0xffff) {
  58         case 0xc8:
  59                 return d_fdc->read_io8(0);
  60         case 0xca:
  61                 return d_fdc->read_io8(1);
  62         case 0xcc:
  63                 return (d_fdc->is_disk_inserted() ? 0x10 : 0) | 0x64;
  64         case 0xbe:
  65                 return (modereg & 0x03) | 0x08;
  66         }
  67         return addr & 0xff;
  68 }
  69
  70 #define STATE_VERSION   1
  71
  72 bool FLOPPY::process_state(FILEIO* state_fio, bool loading)
  73 {
  74         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  75                 return false;
  76         }
  77         if(!state_fio->StateCheckInt32(this_device_id)) {
  78                 return false;
  79         }
  80         state_fio->StateUint8(ctrlreg);
  81         state_fio->StateUint8(modereg);
  82         return true;
  83 }