Bochs/bochs/iodev/parallel.h

/////////////////////////////////////////////////////////////////////////
// $Id$
/////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2001-2021  The Bochs Project
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2 of the License, or (at your option) any later version.
//
//  This library 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
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

#ifndef BX_IODEV_PARPORT_H
#define BX_IODEV_PARPORT_H

#if BX_USE_PAR_SMF
#  define BX_PAR_SMF  static
#  define BX_PAR_THIS theParallelDevice->
#else
#  define BX_PAR_SMF
#  define BX_PAR_THIS this->
#endif

#define BX_PARPORT_MAXDEV   2

enum {
  BX_PAR_DATA = 0,
  BX_PAR_STAT = 1,
  BX_PAR_CTRL = 2
};

typedef struct {
  Bit8u data;
  struct {
    bool error;
    bool slct;
    bool pe;
    bool ack;
    bool busy;
  } STATUS;
  struct {
    bool strobe;
    bool autofeed;
    bool init;
    bool slct_in;
    bool irq;
    bool input;
  } CONTROL;
  Bit8u IRQ;
  bx_param_string_c *file;
  FILE *output;
  bool file_changed;
  bool initmode;
} bx_par_t;

class bx_parallel_c : public bx_devmodel_c {
public:
  bx_parallel_c();
  virtual ~bx_parallel_c();
  virtual void init(void);
  virtual void reset(unsigned type);
  virtual void register_state(void);

private:
  bx_par_t s[BX_PARPORT_MAXDEV];

  static void   virtual_printer(Bit8u port);

  static Bit32u read_handler(void *this_ptr, Bit32u address, unsigned io_len);
  static void   write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len);
#if !BX_USE_PAR_SMF
  Bit32u read(Bit32u address, unsigned io_len);
  void   write(Bit32u address, Bit32u value, unsigned io_len);
#endif
  static const char* parport_file_param_handler(bx_param_string_c *param, bool set,
                                                const char *oldval, const char *val,
                                                int maxlen);
};

#endif