source/src/vm/pc98ha/floppy.cpp

   1 /*\r
   2         NEC PC-98LT Emulator 'ePC-98LT'\r
   3         NEC PC-98HA Emulator 'eHANDY98'\r
   4 \r
   5         Author : Takeda.Toshiya\r
   6         Date   : 2008.06.11 -\r
   7 \r
   8         [ floppy ]\r
   9 */\r
  10 \r
  11 #include "floppy.h"\r
  12 #include "../upd765a.h"\r
  13 \r
  14 void FLOPPY::reset()\r
  15 {\r
  16         chgreg = 3;\r
  17         ctrlreg = 0x80;\r
  18 }\r
  19 \r
  20 void FLOPPY::write_io8(uint32 addr, uint32 data)\r
  21 {\r
  22         switch(addr & 0xffff) {\r
  23         case 0xca:\r
  24                 d_fdc->write_io8(1, data);\r
  25                 break;\r
  26         case 0xcc:\r
  27                 if(!(ctrlreg & 0x80) && (data & 0x80)) {\r
  28                         d_fdc->reset();\r
  29                 }\r
  30                 d_fdc->write_signal(SIG_UPD765A_FREADY, data, 0x40);\r
  31                 d_fdc->write_signal(SIG_UPD765A_MOTOR, data, 0x08);\r
  32                 ctrlreg = data;\r
  33                 break;\r
  34         case 0xbe:\r
  35                 chgreg = data;\r
  36                 break;\r
  37         }\r
  38 }\r
  39 \r
  40 uint32 FLOPPY::read_io8(uint32 addr)\r
  41 {\r
  42         switch(addr & 0xffff) {\r
  43         case 0xc8:\r
  44                 return d_fdc->read_io8(0);\r
  45         case 0xca:\r
  46                 return d_fdc->read_io8(1);\r
  47         case 0xcc:\r
  48                 return (d_fdc->disk_inserted() ? 0x10 : 0) | 0x64;\r
  49         case 0xbe:\r
  50                 return (chgreg & 0x03) | 0x08;\r
  51         }\r
  52         return addr & 0xff;\r
  53 }\r