source/src/vm/x1/floppy.cpp

   1 /*
   2         SHARP X1 Emulator 'eX1'
   3         SHARP X1twin Emulator 'eX1twin'
   4         SHARP X1turbo Emulator 'eX1turbo'
   5         SHARP X1turboZ Emulator 'eX1turboZ'
   6
   7         Author : Takeda.Toshiya
   8         Date   : 2009.03.14-
   9
  10         [ floppy ]
  11 */
  12
  13 #include "floppy.h"
  14 #include "../mb8877.h"
  15 #ifdef _X1TURBO_FEATURE
  16 #include "../disk.h"
  17 #endif
  18
  19 #define EVENT_MOTOR_ON  0
  20 #define EVENT_MOTOR_OFF 1
  21
  22 void FLOPPY::reset()
  23 {
  24         register_id = -1;
  25 }
  26
  27 void FLOPPY::write_io8(uint32_t addr, uint32_t data)
  28 {
  29         switch(addr) {
  30         case 0xffc:
  31                 if(!(prev & 0x80) && (data & 0x80)) {
  32                         // L -> H
  33                         if(register_id != -1) {
  34                                 cancel_event(this, register_id);
  35                                 register_id = -1;
  36                         }
  37                         if(!motor_on) {
  38                                 register_event(this, EVENT_MOTOR_ON, 560000, false, &register_id);
  39                         }
  40                 } else if((prev & 0x80) && !(data & 0x80)) {
  41                         // H -> L
  42                         if(register_id != -1) {
  43                                 cancel_event(this, register_id);
  44                                 register_id = -1;
  45                         }
  46                         if(motor_on) {
  47                                 register_event(this, EVENT_MOTOR_OFF, 1500000, false, &register_id);
  48                         }
  49                 }
  50                 // FIXME: drvsel is active while motor is on ???
  51                 d_fdc->write_signal(SIG_MB8877_DRIVEREG, data, 0x03);
  52                 d_fdc->write_signal(SIG_MB8877_SIDEREG, data, 0x10);
  53                 prev = data;
  54                 break;
  55         }
  56 }
  57
  58 #ifdef _X1TURBO_FEATURE
  59 uint32_t FLOPPY::read_io8(uint32_t addr)
  60 {
  61         switch(addr) {
  62         case 0xffc:     // FM
  63 //              d_fdc->set_drive_mfm(prev & 3, false);
  64                 return 0xff;
  65         case 0xffd:     // MFM
  66 //              d_fdc->set_drive_mfm(prev & 3, true);
  67                 return 0xff;
  68         case 0xffe:     // 2HD
  69                 d_fdc->set_drive_type(prev & 3, DRIVE_TYPE_2HD);
  70 //              d_fdc->set_drive_rpm(prev & 3, 360);
  71                 return 0xff;
  72         case 0xfff:     // 2D/2DD
  73                 if(d_fdc->get_media_type(prev & 3) == MEDIA_TYPE_2DD) {
  74                         d_fdc->set_drive_type(prev & 3, DRIVE_TYPE_2DD);
  75                 } else {
  76                         d_fdc->set_drive_type(prev & 3, DRIVE_TYPE_2D);
  77                 }
  78 //              d_fdc->set_drive_rpm(prev & 3, 300);
  79                 return 0xff;
  80         }
  81         return 0xff;
  82 }
  83 #endif
  84
  85 void FLOPPY::event_callback(int event_id, int err)
  86 {
  87         if(event_id == EVENT_MOTOR_ON) {
  88                 d_fdc->write_signal(SIG_MB8877_MOTOR, 1, 1);
  89                 motor_on = true;
  90         } else if(event_id == EVENT_MOTOR_OFF) {
  91                 d_fdc->write_signal(SIG_MB8877_MOTOR, 0, 0);
  92                 motor_on = false;
  93         }
  94         register_id = -1;
  95 }
  96
  97 #define STATE_VERSION   3
  98
  99 bool FLOPPY::process_state(FILEIO* state_fio, bool loading)
 100 {
 101         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
 102                 return false;
 103         }
 104         if(!state_fio->StateCheckInt32(this_device_id)) {
 105                 return false;
 106         }
 107         state_fio->StateInt32(prev);
 108         state_fio->StateBool(motor_on);
 109         state_fio->StateInt32(register_id);
 110         return true;
 111 }