mirror of https://github.com/stella-emu/stella.git
108 lines
3.1 KiB
C++
108 lines
3.1 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 CARTRIDGECV_HXX
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#define CARTRIDGECV_HXX
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class System;
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#include "bspf.hxx"
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#include "CartEnhanced.hxx"
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#ifdef DEBUGGER_SUPPORT
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#include "CartCVWidget.hxx"
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#endif
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/**
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Cartridge class used for Commavid's extra-RAM games.
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$F000-$F3FF read from RAM
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$F400-$F7FF write to RAM
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$F800-$FFFF ROM
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@author Eckhard Stolberg, Thomas Jentzsch
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*/
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class CartridgeCV : public CartridgeEnhanced
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{
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friend class CartridgeCVWidget;
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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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@param bsSize The size specified by the bankswitching scheme
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*/
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CartridgeCV(const ByteBuffer& image, size_t size, const string& md5,
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const Settings& settings, size_t bsSize = 2_KB);
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virtual ~CartridgeCV() = default;
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public:
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/**
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Reset cartridge to its power-on state
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*/
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void reset() 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 "CartridgeCV"; }
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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 CartridgeCVWidget(boss, lfont, nfont, x, y, w, h, *this);
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}
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#endif
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private:
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bool checkSwitchBank(uInt16, uInt8 = 0) override { return false; }
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protected:
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// Initial RAM data from the cart (doesn't always exist)
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ByteBuffer myInitialRAM{nullptr};
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private:
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// Calculated as: log(ROM bank segment size) / log(2)
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static constexpr uInt16 BANK_SHIFT = 11; // 2K
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// RAM size
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static constexpr uInt32 RAM_SIZE = 0x400; // 1K
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// Write port for extra RAM is at high address
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static constexpr bool RAM_HIGH_WP = true;
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private:
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// Following constructors and assignment operators not supported
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CartridgeCV() = delete;
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CartridgeCV(const CartridgeCV&) = delete;
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CartridgeCV(CartridgeCV&&) = delete;
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CartridgeCV& operator=(const CartridgeCV&) = delete;
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CartridgeCV& operator=(CartridgeCV&&) = delete;
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};
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#endif
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