mirror of
https://github.com/0ldsk00l/nestopia.git
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112 lines
2.9 KiB
C++
112 lines
2.9 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 "NstInpCrazyClimber.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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CrazyClimber::CrazyClimber(const Cpu& c)
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: Device(c,Api::Input::CRAZYCLIMBER)
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{
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CrazyClimber::Reset();
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}
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void CrazyClimber::Reset()
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{
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shifter = 1;
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stream[LEFT] = 0;
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stream[RIGHT] = 0;
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state[LEFT] = 0;
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state[RIGHT] = 0;
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}
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void CrazyClimber::SaveState(State::Saver& saver,const byte id) const
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{
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saver.Begin( AsciiId<'C','C'>::R(0,0,id) ).Write8( shifter ^ 1 ).End();
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}
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void CrazyClimber::LoadState(State::Loader& loader,const dword id)
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{
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if (id == AsciiId<'C','C'>::V)
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shifter = ~loader.Read8() & 0x1;
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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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uint CrazyClimber::Peek(const uint port)
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{
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NST_ASSERT( port <= 1 );
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const uint data = stream[port];
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stream[port] >>= shifter;
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return data & 0x1;
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}
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void CrazyClimber::Poke(const uint data)
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{
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const uint prev = shifter;
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shifter = ~data & 0x1;
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if (prev < shifter)
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{
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if (input)
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{
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Controllers::CrazyClimber& crazy = input->crazyClimber;
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input = NULL;
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if (Controllers::CrazyClimber::callback( crazy ))
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{
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state[LEFT] = crazy.left;
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state[RIGHT] = crazy.right;
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for (uint i=0; i < 2; ++i)
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{
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if ((state[i] & (BUTTON_LEFT|BUTTON_RIGHT)) == (BUTTON_LEFT|BUTTON_RIGHT))
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state[i] &= (BUTTON_LEFT|BUTTON_RIGHT) ^ 0xFFU;
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if ((state[i] & (BUTTON_UP|BUTTON_DOWN)) == (BUTTON_UP|BUTTON_DOWN))
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state[i] &= (BUTTON_UP|BUTTON_DOWN) ^ 0xFFU;
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}
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}
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}
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stream[LEFT] = state[LEFT];
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stream[RIGHT] = state[RIGHT];
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}
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}
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}
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}
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}
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