mirror of https://github.com/stella-emu/stella.git
119 lines
3.6 KiB
C++
119 lines
3.6 KiB
C++
//============================================================================
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//
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// SSSS tt lll lll
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// SS SS tt ll ll
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// SS tttttt eeee ll ll aaaa
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// SSSS tt ee ee ll ll aa
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// SS tt eeeeee ll ll aaaaa -- "An Atari 2600 VCS Emulator"
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// SS SS tt ee ll ll aa aa
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// SSSS ttt eeeee llll llll aaaaa
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//
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// Copyright (c) 1995-2020 by Bradford W. Mott, Stephen Anthony
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// and the Stella Team
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//
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// See the file "License.txt" for information on usage and redistribution of
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// this file, and for a DISCLAIMER OF ALL WARRANTIES.
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//============================================================================
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#ifndef CARTRIDGESB_HXX
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#define CARTRIDGESB_HXX
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#include "bspf.hxx"
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#include "CartEnhanced.hxx"
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#include "System.hxx"
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#ifdef DEBUGGER_SUPPORT
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#include "CartSBWidget.hxx"
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#endif
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/**
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Cartridge class used for SB "SUPERbanking" 128k-256k bankswitched games.
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There are either 32 or 64 4K banks, accessible at hotspots $800 - $81F
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(32 banks) and $800 - $83F (64 banks). All mirrors up to $FFF are
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also used ($900, $A00, ...).
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@author Fred X. Quimby, Thomas Jentzsch
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*/
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class CartridgeSB : public CartridgeEnhanced
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{
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friend class CartridgeSBWidget;
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public:
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/**
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Create a new cartridge using the specified image
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@param image Pointer to the ROM image
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@param size The size of the ROM image
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@param md5 The md5sum of the ROM image
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@param settings A reference to the various settings (read-only)
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*/
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CartridgeSB(const ByteBuffer& image, size_t size, const string& md5,
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const Settings& settings);
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virtual ~CartridgeSB() = default;
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public:
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/**
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Install cartridge in the specified system. Invoked by the system
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when the cartridge is attached to it.
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@param system The system the device should install itself in
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*/
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void install(System& system) override;
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/**
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Get a descriptor for the device name (used in error checking).
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@return The name of the object
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*/
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string name() const override { return "CartridgeSB"; }
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#ifdef DEBUGGER_SUPPORT
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/**
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Get debugger widget responsible for accessing the inner workings
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of the cart.
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*/
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CartDebugWidget* debugWidget(GuiObject* boss, const GUI::Font& lfont,
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const GUI::Font& nfont, int x, int y, int w, int h) override
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{
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return new CartridgeSBWidget(boss, lfont, nfont, x, y, w, h, *this);
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}
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#endif
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public:
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/**
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Get the byte at the specified address.
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@return The byte at the specified address
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*/
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uInt8 peek(uInt16 address) override;
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/**
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Change the byte at the specified address to the given value
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@param address The address where the value should be stored
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@param value The value to be stored at the address
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@return True if the poke changed the device address space, else false
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*/
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bool poke(uInt16 address, uInt8 value) override;
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private:
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bool checkSwitchBank(uInt16 address, uInt8 value = 0) override;
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uInt16 hotspot() const override { return 0x0840; }
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uInt16 getStartBank() const override { return bankCount() - 1; }
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private:
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// Previous Device's page access
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std::array<System::PageAccess, 8> myHotSpotPageAccess;
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private:
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// Following constructors and assignment operators not supported
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CartridgeSB() = delete;
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CartridgeSB(const CartridgeSB&) = delete;
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CartridgeSB(CartridgeSB&&) = delete;
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CartridgeSB& operator=(const CartridgeSB&) = delete;
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CartridgeSB& operator=(CartridgeSB&&) = delete;
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};
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#endif
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