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// license:BSD-3-Clause
// copyright-holders:kmg
/**********************************************************************
Nintendo Family Computer ASCII Turbofile SRAM external storage device
**********************************************************************/
#ifndef MAME_BUS_NES_CTRL_TURBOFILE_H
#define MAME_BUS_NES_CTRL_TURBOFILE_H
#pragma once
#include "ctrl.h"
#include "machine/nvram.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> nes_turbofile_device
class nes_turbofile_device : public device_t,
public device_nes_control_port_interface
{
public:
// construction/destruction
nes_turbofile_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
virtual u8 read_exp(offs_t offset) override;
virtual void write(u8 data) override;
DECLARE_INPUT_CHANGED_MEMBER(lock_changed);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual ioport_constructor device_input_ports() const override;
virtual void device_add_mconfig(machine_config &config) override;
private:
required_device<nvram_device> m_nvram;
required_ioport m_lock;
std::unique_ptr<u8[]> m_ram;
u16 m_addr;
u8 m_bit;
u8 m_latch;
u8 m_locked;
};
// device type definition
DECLARE_DEVICE_TYPE(NES_TURBOFILE, nes_turbofile_device)
#endif // MAME_BUS_NES_CTRL_TURBOFILE_H
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