text: // license:BSD-3-Clause
  // copyright-holders:Curt Coder
  /**********************************************************************
  
      Commodore SuperPET emulation
  
  **********************************************************************/
  
  #ifndef MAME_BUS_PET_SUPERPET_H
  #define MAME_BUS_PET_SUPERPET_H
  
  #pragma once
  
  #include "exp.h"
  #include "machine/mos6551.h"
  #include "machine/mos6702.h"
  
  
  
  //**************************************************************************
  //  TYPE DEFINITIONS
  //**************************************************************************
  
  // ======================> superpet_device
  
  class superpet_device : public device_t,
  						public device_pet_expansion_card_interface
  {
  public:
  	// construction/destruction
  	superpet_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
  
  protected:
  	// device-level overrides
  	virtual void device_start() override;
  	virtual void device_reset() override;
  
  	// optional information overrides
  	virtual const tiny_rom_entry *device_rom_region() const override;
  	virtual void device_add_mconfig(machine_config &config) override;
  	virtual ioport_constructor device_input_ports() const override;
  
  	// device_pet_expansion_card_interface overrides
  	virtual int pet_norom_r(address_space &space, offs_t offset, int sel) override;
  	virtual uint8_t pet_bd_r(address_space &space, offs_t offset, uint8_t data, int &sel) override;
  	virtual void pet_bd_w(address_space &space, offs_t offset, uint8_t data, int &sel) override;
  	virtual int pet_diag_r() override;
  	virtual void pet_irq_w(int state) override;
  
  private:
  	DECLARE_WRITE_LINE_MEMBER( acia_irq_w );
  
  	DECLARE_READ8_MEMBER( read );
  	DECLARE_WRITE8_MEMBER( write );
  
  	void superpet_mem(address_map &map);
  
  	required_device<cpu_device> m_maincpu;
  	required_device<mos6551_device> m_acia;
  	required_device<mos6702_device> m_dongle;
  	required_memory_region m_rom;
  	optional_shared_ptr<uint8_t> m_ram;
  	required_ioport m_io_sw1;
  	required_ioport m_io_sw2;
  
  	inline void update_cpu();
  	inline bool is_ram_writable();
  
  	uint8_t m_system;
  	uint8_t m_bank;
  	uint8_t m_sw1;
  	uint8_t m_sw2;
  	int m_sel9_rom;
  	int m_pet_irq;
  	int m_acia_irq;
  };
  
  
  // device type definition
  DECLARE_DEVICE_TYPE(SUPERPET, superpet_device)
  
  
  #endif // MAME_BUS_PET_SUPERPET_H
  