floppy.h

Go to the documentation of this file.

// See the end of this file for license information.

#ifndef TORSION_FLOPPY_H
#define TORSION_FLOPPY_H

#include "dma.h"
#include "irq.h"
#include "blockdev.h"
#include "semaphore.h"
#include "timer.h"
#include "sched.h"

class Floppy;
extern Floppy* floppy;


class Floppy : public Block_device {
protected:
  static const Size BLOCK_SIZE = 512;
  DMA_buffer buffer;      
  bool disk_change;
  unsigned char status[7];
  unsigned char status_size;
  unsigned char sr0;
  unsigned char current_track;    
  Int_handler handler;      

public:
  Semaphore operation_lock;   
  Timer_callback motor_kill_callback; 
  bool motor_on;      

  virtual void
  init();
  
  virtual void
  deinit();

  void
  reset();

  void
  send_byte(unsigned short int byte);

  short int
  get_byte();

  bool
  wait_for_op(bool sense_interrupt_status);

  bool
  seek(unsigned char track);

  void
  recalibrate();

  void
  turn_motor_on();

  void
  turn_motor_off();

  virtual bool
  read_block(unsigned block, void* data);
  
  virtual bool
  write_block(unsigned block, void* data);

  bool
  read_write(unsigned block, void* data, bool read);

  void
  print();
};

bool
really_turn_motor_off(void* floppy_void_ptr);

inline bool
floppy_interrupt_handler();

const unsigned DG144_HEADS = 2;   
const unsigned DG144_TRACKS = 80; 
const unsigned DG144_SPT = 18;    
const unsigned DG144_GAP3FMT = 0x54;  
const unsigned DG144_GAP3RW = 0x1b; 

const unsigned DG168_HEADS = 2;   
const unsigned DG168_TRACKS = 80; 
const unsigned DG168_SPT = 21;    
const unsigned DG168_GAP3FMT = 0x0c;  
const unsigned DG168_GAP3RW = 0x1c; 

const unsigned FDC_DOR = 0x3f2;   
const unsigned FDC_MSR = 0x3f4;   
const unsigned FDC_DRS = 0x3f4;   
const unsigned FDC_DATA = 0x3f5;  
const unsigned FDC_DIR = 0x3f7;   
const unsigned FDC_CCR = 0x3f7;   

const unsigned CMD_SPECIFY = 0x03;  
const unsigned CMD_WRITE = 0xc5;  
const unsigned CMD_READ = 0xe6;   
const unsigned CMD_RECAL = 0x07;  
const unsigned CMD_SENSEI = 0x08; 
const unsigned CMD_FORMAT = 0x4d; 
const unsigned CMD_SEEK = 0x0f;   
const unsigned CMD_VERSION = 0x10;  

#endif

/* Torsion Operating System, Copyright (C) 2000-2004 Dan Helfman
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details (in the COPYING file).
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

---

Torsion Operating System, Copyright (C) 2000-2004 Dan Helfman