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//============================================================================
//
// SSSS tt lll lll
// SS SS tt ll ll
// SS tttttt eeee ll ll aaaa "An Atari 2600 VCS Emulator"
// SSSS tt ee ee ll ll aa
// SS tt eeeeee ll ll aaaaa Copyright (c) 1995,1996,1997
// SS SS tt ee ll ll aa aa Bradford W. Mott
// SSSS ttt eeeee llll llll aaaaa
//
//============================================================================
#ifndef CARTRIDGEE7_HXX
#define CARTRIDGEE7_HXX
class CartridgeE7;
#include "machine.hxx"
#include "Cart.hxx"
/**
This is the M-Network Bankswitching method (E7). There are two 2K
slices, 8 ROM banks, and 2K of RAM. The RAM is broken into two
1K pieces. One 1K piece goes into slice 0 if selected and the other
one is broken into four 256-byte parts.
@author Bradford W. Mott
@version $Id: CartE7.hxx,v 1.2 1997/05/17 19:00:03 bwmott Exp $
*/
class CartridgeE7 : public Cartridge
{
public:
/// Constructor
CartridgeE7(System& system, uByte* image);
/// Destructor
virtual ~CartridgeE7();
/// Reset to power on state
void reset();
/// Answer the byte at the given address
virtual uByte peek(uWord addr);
/// Store value in the given address
virtual void poke(uWord addr, uByte value);
private:
// Addressing offsets for each of the 2 2K slices in the ROM image
uWord myImageOffset[2];
// Addressing offset for the 4 256 byte RAM slices
uWord myRAMOffset;
// 16 ROM image of cartridge and 1K for RAM available from 0x0000 to 0x07FF
uByte myImage[9 * 2048];
// Four 256 byte RAMs available from 0x0800 to 0x09FF
uByte myRAM[1024];
};
#endif
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