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//============================================================================
//
// 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) 1995-2007 by Bradford W. Mott and the Stella team
//
// See the file "license" for information on usage and redistribution of
// this file, and for a DISCLAIMER OF ALL WARRANTIES.
//
// $Id: Cart4K.cxx,v 1.10 2007/01/14 16:17:52 stephena Exp $
//============================================================================
#include <cassert>
#include "System.hxx"
#include "Serializer.hxx"
#include "Deserializer.hxx"
#include "Cart4K.hxx"
using namespace std;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Cartridge4K::Cartridge4K(const uInt8* image)
{
// Copy the ROM image into my buffer
for(uInt32 addr = 0; addr < 4096; ++addr)
{
myImage[addr] = image[addr];
}
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Cartridge4K::~Cartridge4K()
{
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
const char* Cartridge4K::name() const
{
return "Cartridge4K";
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void Cartridge4K::reset()
{
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void Cartridge4K::install(System& system)
{
mySystem = &system;
uInt16 shift = mySystem->pageShift();
uInt16 mask = mySystem->pageMask();
// Make sure the system we're being installed in has a page size that'll work
assert((0x1000 & mask) == 0);
System::PageAccess access;
access.directPokeBase = 0;
access.device = this;
// Map ROM image into the system
for(uInt32 address = 0x1000; address < 0x2000; address += (1 << shift))
{
access.directPeekBase = &myImage[address & 0x0FFF];
mySystem->setPageAccess(address >> mySystem->pageShift(), access);
}
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
uInt8 Cartridge4K::peek(uInt16 address)
{
return myImage[address & 0x0FFF];
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void Cartridge4K::poke(uInt16, uInt8)
{
// This is ROM so poking has no effect :-)
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
bool Cartridge4K::save(Serializer& out)
{
string cart = name();
try
{
out.putString(cart);
}
catch(const char* msg)
{
ale::Logger::Error << msg << endl;
return false;
}
catch(...)
{
ale::Logger::Error << "Unknown error in save state for " << cart << endl;
return false;
}
return true;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
bool Cartridge4K::load(Deserializer& in)
{
string cart = name();
try
{
if(in.getString() != cart)
return false;
}
catch(const char* msg)
{
ale::Logger::Error << msg << endl;
return false;
}
catch(...)
{
ale::Logger::Error << "Unknown error in load state for " << cart << endl;
return false;
}
return true;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void Cartridge4K::bank(uInt16 bank)
{
// Doesn't support bankswitching
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
int Cartridge4K::bank()
{
// Doesn't support bankswitching
return 0;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
int Cartridge4K::bankCount()
{
return 1;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
bool Cartridge4K::patch(uInt16 address, uInt8 value)
{
myImage[address & 0x0FFF] = value;
return true;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
uInt8* Cartridge4K::getImage(int& size)
{
size = 4096;
return &myImage[0];
}