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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: CartF4.cxx,v 1.11 2007/01/14 16:17:53 stephena Exp $
//============================================================================
#include <cassert>
#include "System.hxx"
#include "Serializer.hxx"
#include "Deserializer.hxx"
#include "CartF4.hxx"
using namespace std;
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
CartridgeF4::CartridgeF4(const uInt8* image)
{
// Copy the ROM image into my buffer
for(uInt32 addr = 0; addr < 32768; ++addr)
{
myImage[addr] = image[addr];
}
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
CartridgeF4::~CartridgeF4()
{
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
const char* CartridgeF4::name() const
{
return "CartridgeF4";
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void CartridgeF4::reset()
{
// Upon reset we switch to bank 0
bank(0);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void CartridgeF4::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);
// Set the page accessing methods for the hot spots
System::PageAccess access;
for(uInt32 i = (0x1FF4 & ~mask); i < 0x2000; i += (1 << shift))
{
access.directPeekBase = 0;
access.directPokeBase = 0;
access.device = this;
mySystem->setPageAccess(i >> shift, access);
}
// Install pages for bank 0
bank(0);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
uInt8 CartridgeF4::peek(uInt16 address)
{
address = address & 0x0FFF;
// Switch banks if necessary
if((address >= 0x0FF4) && (address <= 0x0FFB))
{
bank(address - 0x0FF4);
}
return myImage[myCurrentBank * 4096 + address];
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void CartridgeF4::poke(uInt16 address, uInt8)
{
address = address & 0x0FFF;
// Switch banks if necessary
if((address >= 0x0FF4) && (address <= 0x0FFB))
{
bank(address - 0x0FF4);
}
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
bool CartridgeF4::save(Serializer& out)
{
string cart = name();
try
{
out.putString(cart);
out.putInt(myCurrentBank);
}
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 CartridgeF4::load(Deserializer& in)
{
string cart = name();
try
{
if(in.getString() != cart)
{
return false;
}
myCurrentBank = (uInt16)in.getInt();
}
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;
}
// Remember what bank we were in
bank(myCurrentBank);
return true;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void CartridgeF4::bank(uInt16 bank)
{
if(bankLocked) return;
// Remember what bank we're in
myCurrentBank = bank;
uInt16 offset = myCurrentBank * 4096;
uInt16 shift = mySystem->pageShift();
uInt16 mask = mySystem->pageMask();
// Setup the page access methods for the current bank
System::PageAccess access;
access.device = this;
access.directPokeBase = 0;
// Map ROM image into the system
for(uInt32 address = 0x1000; address < (0x1FF4U & ~mask);
address += (1 << shift))
{
access.directPeekBase = &myImage[offset + (address & 0x0FFF)];
mySystem->setPageAccess(address >> shift, access);
}
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
int CartridgeF4::bank()
{
return myCurrentBank;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
int CartridgeF4::bankCount()
{
return 8;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
bool CartridgeF4::patch(uInt16 address, uInt8 value)
{
address = address & 0x0FFF;
myImage[myCurrentBank * 4096 + address] = value;
return true;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
uInt8* CartridgeF4::getImage(int& size)
{
size = 32768;
return &myImage[0];
}