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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
//
////////////////////////////////////////////////////////////////////////////////////////
#include "NstInpDevice.hpp"
#include "NstInpOekaKidsTablet.hpp"
namespace Nes
{
namespace Core
{
namespace Input
{
#ifdef NST_MSVC_OPTIMIZE
#pragma optimize("s", on)
#endif
OekaKidsTablet::OekaKidsTablet(const Cpu& c)
: Device(c,Api::Input::OEKAKIDSTABLET)
{
OekaKidsTablet::Reset();
}
void OekaKidsTablet::Reset()
{
latch = 0;
state = 0;
stream = 0;
bits = 0;
}
void OekaKidsTablet::SaveState(State::Saver& saver,const byte id) const
{
saver.Begin( AsciiId<'O','T'>::R(0,0,id) ).End();
}
#ifdef NST_MSVC_OPTIMIZE
#pragma optimize("", on)
#endif
void OekaKidsTablet::Poke(uint data)
{
if (data & 0x1)
{
if (~latch & data & 0x2)
stream <<= 1;
state = (data & 0x2) ? (~stream >> 15 & 0x8) : 0x4;
latch = data;
}
else
{
state = 0;
if (input)
{
Controllers::OekaKidsTablet& tablet = input->oekaKidsTablet;
input = NULL;
if (Controllers::OekaKidsTablet::callback( tablet ))
{
if (tablet.x <= 255 && tablet.y <= 239)
{
dword data = tablet.y * 256U / 240;
if (data > 12)
data = (data - 12) << 2;
else
data = 0;
data |= (tablet.x * 240U / 256 + 8UL) << 10;
if (tablet.button)
{
data |= 0x3;
}
else if (tablet.y >= 48)
{
data |= 0x2;
}
bits = data;
}
}
}
stream = bits;
}
}
uint OekaKidsTablet::Peek(uint port)
{
return port ? state : 0;
}
}
}
}
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