new header for 64K Megaboy cart

git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@35 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba

stella/src/emucore/CartMB.hxx

@@ -0,0 +1,101 @@
+//============================================================================
+//
+//   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) 1995-1998 by Bradford W. Mott
+//
+// See the file "license" for information on usage and redistribution of
+// this file, and for a DISCLAIMER OF ALL WARRANTIES.
+//
+// $Id: CartMB.hxx,v 1.1 2002-01-18 16:02:30 estolberg Exp $
+//============================================================================
+
+#ifndef CARTRIDGEMB_HXX
+#define CARTRIDGEMB_HXX
+
+class CartridgeMB;
+
+#include "bspf.hxx"
+#include "Cart.hxx"
+
+/**
+  Cartridge class used for Dynacom Megaboy
+  There are 16 4K banks.
+  Accessing $1FF0 switches to next bank.
+
+  @author  Eckhard Stolberg
+  @version $Id: CartMB.hxx,v 1.1 2002-01-18 16:02:30 estolberg Exp $
+*/
+class CartridgeMB : public Cartridge
+{
+  public:
+    /**
+      Create a new cartridge using the specified image
+
+      @param image Pointer to the ROM image
+    */
+    CartridgeMB(const uInt8* image);
+
+    /**
+      Destructor
+    */
+    virtual ~CartridgeMB();
+
+  public:
+    /**
+      Get a null terminated string which is the device's name (i.e. "M6532")
+
+      @return The name of the device
+    */
+    virtual const char* name() const;
+
+    /**
+      Reset device to its power-on state
+    */
+    virtual void reset();
+
+    /**
+      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
+    */
+    virtual void install(System& system);
+
+  public:
+    /**
+      Get the byte at the specified address.
+
+      @return The byte at the specified address
+    */
+    virtual uInt8 peek(uInt16 address);
+
+    /**
+      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
+    */
+    virtual void poke(uInt16 address, uInt8 value);
+
+  private:
+    /**
+      Install pages for the next bank in the system
+    */
+    void incbank();
+
+  private:
+    // Indicates which bank is currently active
+    uInt16 myCurrentBank;
+
+    // The 64K ROM image of the cartridge
+    uInt8 myImage[65536];
+};
+#endif
+