mirror of https://github.com/stella-emu/stella.git
121 lines
3.7 KiB
C++
121 lines
3.7 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 CARTRIDGEX07_HXX
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#define CARTRIDGEX07_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 "CartX07Widget.hxx"
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#endif
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/**
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Bankswitching method as defined/created by John Payson (aka Supercat)
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and Fred Quimby (aka batari).
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This bankswitching method has 16 4K banks that can be accessed at
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addresses $1000 to $1FFF. The bankswitching hotspots are all below
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$1000. X07 uses two types of hotspots:
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0 1xxx nnnn 1101 -- Switch to bank nnnn
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0 0xxx 0nxx xxxx -- If in bank 111x, switch to bank 111n.
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In any other bank, do not switch.
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Note that the latter will hit on almost any TIA access.
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@author Eckhard Stolberg, Thomas Jentzsch
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*/
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class CartridgeX07 : public CartridgeEnhanced
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{
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friend class CartridgeX07Widget;
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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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CartridgeX07(const ByteBuffer& image, size_t size, const string& md5,
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const Settings& settings, size_t bsSize = 64_KB);
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virtual ~CartridgeX07() = 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 "CartridgeX07"; }
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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 CartridgeX07Widget(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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private:
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// Following constructors and assignment operators not supported
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CartridgeX07() = delete;
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CartridgeX07(const CartridgeX07&) = delete;
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CartridgeX07(CartridgeX07&&) = delete;
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CartridgeX07& operator=(const CartridgeX07&) = delete;
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CartridgeX07& operator=(CartridgeX07&&) = delete;
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};
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#endif
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