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/*********************************************************************
micropolis.h
Implementations of the Micropolis
floppy disk controller for the Sorcerer
*********************************************************************/
#ifndef __MICROPOLIS_H__
#define __MICROPOLIS_H__
#include "devcb.h"
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
/* Interface */
struct micropolis_interface
{
devcb_read_line m_in_dden_cb;
devcb_write_line m_out_intrq_cb;
devcb_write_line m_out_drq_cb;
const char *m_floppy_drive_tags[4];
};
/***************************************************************************
MACROS
***************************************************************************/
class micropolis_device : public device_t,
public micropolis_interface
{
public:
micropolis_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~micropolis_device() {}
void set_drive(UINT8 drive); // set current drive (0-3)
DECLARE_READ8_MEMBER( status_r );
DECLARE_READ8_MEMBER( data_r );
DECLARE_WRITE8_MEMBER( command_w );
DECLARE_WRITE8_MEMBER( data_w );
DECLARE_READ8_MEMBER( read );
DECLARE_WRITE8_MEMBER( write );
protected:
// device-level overrides
virtual void device_config_complete();
virtual void device_start();
virtual void device_reset();
private:
// internal state
devcb_resolved_read_line m_in_dden_func;
devcb_resolved_write_line m_out_intrq_func;
devcb_resolved_write_line m_out_drq_func;
/* register */
UINT8 m_data;
UINT8 m_drive_num;
UINT8 m_track;
UINT8 m_sector;
UINT8 m_command;
UINT8 m_status;
UINT8 m_write_cmd; /* last write command issued */
UINT8 m_buffer[6144]; /* I/O buffer (holds up to a whole track) */
UINT32 m_data_offset; /* offset into I/O buffer */
INT32 m_data_count; /* transfer count from/into I/O buffer */
UINT32 m_sector_length; /* sector length (byte) */
/* this is the drive currently selected */
device_t *m_drive;
void read_sector();
void write_sector();
};
extern const device_type MICROPOLIS;
/***************************************************************************
FUNCTION PROTOTYPES
***************************************************************************/
extern const micropolis_interface default_micropolis_interface;
/***************************************************************************
DEVICE CONFIGURATION MACROS
***************************************************************************/
#define MCFG_MICROPOLIS_ADD(_tag, _intrf) \
MCFG_DEVICE_ADD(_tag, MICROPOLIS, 0) \
MCFG_DEVICE_CONFIG(_intrf)
#endif /* __MICROPOLIS_H__ */
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