mirror of
https://github.com/0ldsk00l/nestopia.git
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117 lines
2.7 KiB
C++
117 lines
2.7 KiB
C++
////////////////////////////////////////////////////////////////////////////////////////
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//
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// Nestopia - NES/Famicom emulator written in C++
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//
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// Copyright (C) 2003-2008 Martin Freij
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//
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// This file is part of Nestopia.
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//
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// Nestopia is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// Nestopia is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Nestopia; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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////////////////////////////////////////////////////////////////////////////////////////
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#include "NstInpDevice.hpp"
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#include "NstInpOekaKidsTablet.hpp"
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namespace Nes
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{
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namespace Core
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{
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namespace Input
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{
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#ifdef NST_MSVC_OPTIMIZE
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#pragma optimize("s", on)
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#endif
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OekaKidsTablet::OekaKidsTablet(const Cpu& c)
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: Device(c,Api::Input::OEKAKIDSTABLET)
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{
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OekaKidsTablet::Reset();
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}
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void OekaKidsTablet::Reset()
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{
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latch = 0;
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state = 0;
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stream = 0;
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bits = 0;
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}
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void OekaKidsTablet::SaveState(State::Saver& saver,const byte id) const
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{
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saver.Begin( AsciiId<'O','T'>::R(0,0,id) ).End();
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}
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#ifdef NST_MSVC_OPTIMIZE
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#pragma optimize("", on)
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#endif
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void OekaKidsTablet::Poke(uint data)
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{
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if (data & 0x1)
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{
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if (~latch & data & 0x2)
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stream <<= 1;
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state = (data & 0x2) ? (~stream >> 15 & 0x8) : 0x4;
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latch = data;
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}
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else
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{
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state = 0;
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if (input)
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{
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Controllers::OekaKidsTablet& tablet = input->oekaKidsTablet;
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input = NULL;
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if (Controllers::OekaKidsTablet::callback( tablet ))
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{
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if (tablet.x <= 255 && tablet.y <= 239)
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{
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dword data = tablet.y * 256U / 240;
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if (data > 12)
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data = (data - 12) << 2;
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else
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data = 0;
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data |= (tablet.x * 240U / 256 + 8UL) << 10;
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if (tablet.button)
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{
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data |= 0x3;
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}
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else if (tablet.y >= 48)
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{
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data |= 0x2;
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}
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bits = data;
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}
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}
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}
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stream = bits;
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}
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}
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uint OekaKidsTablet::Peek(uint port)
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{
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return port ? state : 0;
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}
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}
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}
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}
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