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////////////////////////////////////////////////////////////////////////////////////////
//
// Nestopia - NES/Famicom emulator written in C++
//
// Copyright (C) 2003-2008 Martin Freij
//
// This file is part of Nestopia.
//
// Nestopia is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// Nestopia is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Nestopia; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
////////////////////////////////////////////////////////////////////////////////////////
#ifndef NST_RAM_H
#define NST_RAM_H
#ifdef NST_PRAGMA_ONCE
#pragma once
#endif
#include "NstPins.hpp"
namespace Nes
{
namespace Core
{
class Ram
{
public:
enum Type
{
RAM,
NVRAM,
ROM
};
Ram();
Ram(const Ram&);
Ram(Type,bool,bool,dword,byte* = NULL);
~Ram();
void Set(dword,byte* = NULL);
void Set(Type,bool,bool,dword,byte* = NULL);
void Destroy();
void Fill(uint) const;
void Mirror(dword);
Ram& operator = (const Ram&);
private:
byte* mem;
dword mask;
dword size;
byte type;
bool readable;
bool writable;
bool internal;
Pins pins;
public:
dword Size() const
{
return size;
}
dword Masking() const
{
return mask;
}
bool Empty() const
{
return size == 0;
}
bool Readable() const
{
return readable;
}
bool Writable() const
{
return writable;
}
bool Internal() const
{
return internal;
}
Type GetType() const
{
return static_cast<Type>(type);
}
void ReadEnable(bool r)
{
readable = r;
}
void WriteEnable(bool w)
{
writable = w;
}
void SetSecurity(bool r,bool w)
{
readable = r;
writable = w;
}
void SetType(Type t)
{
type = t;
}
byte* Mem(dword offset=0) const
{
return mem + (offset & mask);
}
byte& operator [] (dword i) const
{
return mem[i];
}
Pins::PinsProxy Pin(uint i)
{
return pins[i];
}
Pins::ConstPinsProxy Pin(uint i) const
{
return pins[i];
}
bool PinsDefined() const
{
return pins;
}
};
}
}
#endif
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