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/////////////////////////////////////////////////////////////////////////
// $Id: floppy.h,v 1.16 2002/11/30 09:39:29 vruppert Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
//
// MandrakeSoft S.A.
// 43, rue d'Aboukir
// 75002 Paris - France
// http://www.linux-mandrake.com/
// http://www.mandrakesoft.com/
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#define FROM_FLOPPY 10
#define TO_FLOPPY 11
#if BX_USE_FD_SMF
# define BX_FD_SMF static
# define BX_FD_THIS theFloppyController->
#else
# define BX_FD_SMF
# define BX_FD_THIS this->
#endif
typedef struct {
int fd; /* file descriptor of floppy image file */
unsigned sectors_per_track; /* number of sectors/track */
unsigned sectors; /* number of formatted sectors on diskette */
unsigned tracks; /* number of tracks */
unsigned heads; /* number of heads */
unsigned type;
unsigned write_protected;
} floppy_t;
class bx_floppy_ctrl_c : public bx_floppy_stub_c {
public:
bx_floppy_ctrl_c(void);
~bx_floppy_ctrl_c(void);
virtual void init(void);
virtual void reset(unsigned type);
virtual unsigned set_media_status(unsigned drive, unsigned status);
virtual unsigned get_media_status(unsigned drive);
private:
struct {
Bit8u data_rate;
Bit8u command[10]; /* largest command size ??? */
Bit8u command_index;
Bit8u command_size;
bx_bool command_complete;
Bit8u pending_command;
bx_bool multi_track;
bx_bool pending_irq;
Bit8u reset_sensei;
Bit8u format_count;
Bit8u format_fillbyte;
Bit8u result[10];
Bit8u result_index;
Bit8u result_size;
Bit8u DOR; // Digital Ouput Register
Bit8u TDR; // Tape Drive Register
Bit8u cylinder[4]; // really only using 2 drives
Bit8u head[4]; // really only using 2 drives
Bit8u sector[4]; // really only using 2 drives
/* MAIN STATUS REGISTER
* b7: MRQ: main request 1=data register ready 0=data register not ready
* b6: DIO: data input/output:
* 1=controller->CPU (ready for data read)
* 0=CPU->controller (ready for data write)
* b5: NDMA: non-DMA mode: 1=controller not in DMA modes
* 0=controller in DMA mode
* b4: BUSY: instruction(device busy) 1=active 0=not active
* b3-0: ACTD, ACTC, ACTB, ACTA:
* drive D,C,B,A in positioning mode 1=active 0=not active
*/
Bit8u main_status_reg;
Bit8u status_reg0;
Bit8u status_reg1;
Bit8u status_reg2;
Bit8u status_reg3;
// drive field allows up to 4 drives, even though probably only 2 will
// ever be used.
floppy_t media[4];
unsigned num_supported_floppies;
Bit8u floppy_buffer[512+2]; // 2 extra for good measure
unsigned floppy_buffer_index;
int floppy_timer_index;
bx_bool media_present[2];
Bit8u device_type[4];
Bit8u DIR[4]; // Digital Input Register:
// b7: 0=diskette is present and has not been changed
// 1=diskette missing or changed
} s; // state information
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_FD_SMF
Bit32u read(Bit32u address, unsigned io_len);
void write(Bit32u address, Bit32u value, unsigned io_len);
#endif
BX_FD_SMF void dma_write(Bit8u *data_byte);
BX_FD_SMF void dma_read(Bit8u *data_byte);
BX_FD_SMF void floppy_command(void);
BX_FD_SMF void floppy_xfer(Bit8u drive, Bit32u offset, Bit8u *buffer, Bit32u bytes, Bit8u direction);
BX_FD_SMF void raise_interrupt(void);
BX_FD_SMF void enter_idle_phase(void);
BX_FD_SMF void enter_result_phase(void);
static void timer_handler(void *);
public:
BX_FD_SMF void timer(void);
BX_FD_SMF void increment_sector(void);
BX_FD_SMF bx_bool evaluate_media(unsigned type, char *path, floppy_t *floppy);
};
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