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// license:BSD-3-Clause
// copyright-holders:R. Belmont
/*********************************************************************
a2scsi.h
Implementation of the Apple II SCSI Card
*********************************************************************/
#ifndef MAME_BUS_A2BUS_A2SCSI_H
#define MAME_BUS_A2BUS_A2SCSI_H
#pragma once
#include "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, const char *tag, device_t *owner, uint32_t clock);
DECLARE_WRITE_LINE_MEMBER( drq_w );
protected:
a2bus_scsi_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_add_mconfig(machine_config &config) override;
virtual const tiny_rom_entry *device_rom_region() const override;
// overrides of standard a2bus slot functions
virtual uint8_t read_c0nx(uint8_t offset) override;
virtual void write_c0nx(uint8_t offset, uint8_t data) override;
virtual uint8_t read_cnxx(uint8_t offset) override;
virtual void write_cnxx(uint8_t offset, uint8_t data) override;
virtual uint8_t read_c800(uint16_t offset) override;
virtual void write_c800(uint16_t offset, uint8_t data) override;
required_device<ncr5380n_device> m_ncr5380;
required_device<nscsi_bus_device> m_scsibus;
private:
uint8_t *m_rom;
uint8_t m_ram[8192]; // 8 banks of 1024 bytes
int m_rambank, m_rombank;
uint8_t m_drq;
uint8_t m_bank;
bool m_816block;
};
// device type definition
DECLARE_DEVICE_TYPE(A2BUS_SCSI, a2bus_scsi_device)
#endif // MAME_BUS_A2BUS_A2SCSI_H
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