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/*********************************************************************
a2scsi.h
Implementation of the Apple II SCSI Card
*********************************************************************/
#ifndef __A2BUS_SCSI__
#define __A2BUS_SCSI__
#include "emu.h"
#include "machine/a2bus.h"
#include "machine/ncr5380n.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class a2bus_scsi_device:
public device_t,
public device_a2bus_card_interface
{
public:
// construction/destruction
a2bus_scsi_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source);
a2bus_scsi_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// optional information overrides
virtual machine_config_constructor device_mconfig_additions() const;
virtual const rom_entry *device_rom_region() const;
required_device<ncr5380n_device> m_ncr5380;
required_device<nscsi_bus_device> m_scsibus;
DECLARE_WRITE_LINE_MEMBER( drq_w );
protected:
virtual void device_start();
virtual void device_reset();
// overrides of standard a2bus slot functions
virtual UINT8 read_c0nx(address_space &space, UINT8 offset);
virtual void write_c0nx(address_space &space, UINT8 offset, UINT8 data);
virtual UINT8 read_cnxx(address_space &space, UINT8 offset);
virtual void write_cnxx(address_space &space, UINT8 offset, UINT8 data);
virtual UINT8 read_c800(address_space &space, UINT16 offset);
virtual void write_c800(address_space &space, UINT16 offset, UINT8 data);
private:
UINT8 *m_rom;
UINT8 m_ram[8192]; // 8 banks of 1024 bytes
int m_rambank, m_rombank;
UINT8 m_drq;
UINT8 m_bank;
bool m_816block;
};
// device type definition
extern const device_type A2BUS_SCSI;
#endif /* __A2BUS_SCSI__ */
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