//============================================================================
//
//   SSSS    tt          lll  lll
//  SS  SS   tt           ll   ll
//  SS     tttttt  eeee   ll   ll   aaaa
//   SSSS    tt   ee  ee  ll   ll      aa
//      SS   tt   eeeeee  ll   ll   aaaaa  --  "An Atari 2600 VCS Emulator"
//  SS  SS   tt   ee      ll   ll  aa  aa
//   SSSS     ttt  eeeee llll llll  aaaaa
//
// Copyright (c) 1995-2021 by Bradford W. Mott, Stephen Anthony
// and the Stella Team
//
// See the file "License.txt" for information on usage and redistribution of
// this file, and for a DISCLAIMER OF ALL WARRANTIES.
//============================================================================

#ifndef CARTRIDGE0840_HXX
#define CARTRIDGE0840_HXX

#include "bspf.hxx"
#include "CartEnhanced.hxx"
#include "System.hxx"
#ifdef DEBUGGER_SUPPORT
  #include "Cart0840Widget.hxx"
#endif

/**
  Cartridge class used for 0840 "Econobanking" 8K bankswitched games.  There
  are two 4K banks, which are switched by accessing $0800 (bank 0) and
  $0840 (bank 1).

  @author  Fred X. Quimby, Thomas Jentzsch
*/
class Cartridge0840 : public CartridgeEnhanced
{
  friend class Cartridge0840Widget;

  public:
    /**
      Create a new cartridge using the specified image

      @param image     Pointer to the ROM image
      @param size      The size of the ROM image
      @param md5       The md5sum of the ROM image
      @param settings  A reference to the various settings (read-only)
      @param bsSize    The size specified by the bankswitching scheme
    */
    Cartridge0840(const ByteBuffer& image, size_t size, const string& md5,
                  const Settings& settings, size_t bsSize = 8_KB);
    ~Cartridge0840() override = default;

  public:
    /**
      Install cartridge in the specified system.  Invoked by the system
      when the cartridge is attached to it.

      @param system The system the device should install itself in
    */
    void install(System& system) override;

    /**
      Get a descriptor for the device name (used in error checking).

      @return The name of the object
    */
    string name() const override { return "Cartridge0840"; }

  #ifdef DEBUGGER_SUPPORT
    /**
      Get debugger widget responsible for accessing the inner workings
      of the cart.
    */
    CartDebugWidget* debugWidget(GuiObject* boss, const GUI::Font& lfont,
        const GUI::Font& nfont, int x, int y, int w, int h) override
    {
      return new Cartridge0840Widget(boss, lfont, nfont, x, y, w, h, *this);
    }
  #endif

  public:
    /**
      Get the byte at the specified address.

      @return The byte at the specified address
    */
    uInt8 peek(uInt16 address) override;

    /**
      Change the byte at the specified address to the given value

      @param address The address where the value should be stored
      @param value The value to be stored at the address
      @return  True if the poke changed the device address space, else false
    */
    bool poke(uInt16 address, uInt8 value) override;

  private:
    bool checkSwitchBank(uInt16 address, uInt8 value = 0) override;

    uInt16 hotspot() const override { return 0x0840; }

  private:
    // Previous Device's page access
    std::array<System::PageAccess, 8> myHotSpotPageAccess;

  private:
    // Following constructors and assignment operators not supported
    Cartridge0840() = delete;
    Cartridge0840(const Cartridge0840&) = delete;
    Cartridge0840(Cartridge0840&&) = delete;
    Cartridge0840& operator=(const Cartridge0840&) = delete;
    Cartridge0840& operator=(Cartridge0840&&) = delete;
};

#endif
