source/src/vm/multi8/floppy.cpp

   1 /*
   2         MITSUBISHI Electric MULTI8 Emulator 'EmuLTI8'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2006.09.17 -
   6
   7         [ floppy ]
   8 */
   9
  10 #include "floppy.h"
  11 #include "../upd765a.h"
  12
  13 namespace MULTI8 {
  14
  15 void FLOPPY::write_io8(uint32_t addr, uint32_t data)
  16 {
  17         switch(addr & 0xff) {
  18         case 0x72:
  19                 // data register + dack
  20                 d_fdc->write_dma_io8(addr, data);
  21                 break;
  22         case 0x73:
  23                 // motor on/off
  24                 d_fdc->write_signal(SIG_UPD765A_MOTOR, data, 1);
  25                 break;
  26         case 0x74:
  27                 // tc on
  28                 d_fdc->write_signal(SIG_UPD765A_TC, 1, 1);
  29                 break;
  30         }
  31 }
  32
  33 uint32_t FLOPPY::read_io8(uint32_t addr)
  34 {
  35         switch(addr & 0xff) {
  36         case 0x72:
  37                 // data register + dack
  38                 return d_fdc->read_dma_io8(addr);
  39         case 0x73:
  40                 return drq ? 0xff : 0x7f;
  41         }
  42         return 0xff;
  43 }
  44
  45 void FLOPPY::write_signal(int id, uint32_t data, uint32_t mask)
  46 {
  47         drq = ((data & mask) != 0);
  48 }
  49
  50 #define STATE_VERSION   1
  51
  52 bool FLOPPY::process_state(FILEIO* state_fio, bool loading)
  53 {
  54         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  55                 return false;
  56         }
  57         if(!state_fio->StateCheckInt32(this_device_id)) {
  58                 return false;
  59         }
  60         state_fio->StateValue(drq);
  61         return true;
  62 }
  63
  64 }