mirror of
https://github.com/0ldsk00l/nestopia.git
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107 lines
2.6 KiB
C++
107 lines
2.6 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 "NstInpSuborKeyboard.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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SuborKeyboard::SuborKeyboard(const Cpu& c)
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: Device(c,Api::Input::SUBORKEYBOARD)
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{
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SuborKeyboard::Reset();
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}
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void SuborKeyboard::Reset()
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{
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scan = 0;
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mode = 0;
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}
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void SuborKeyboard::SaveState(State::Saver& saver,const byte id) const
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{
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saver.Begin( AsciiId<'S','K'>::R(0,0,id) ).Write8( mode | (scan << 1) ).End();
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}
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void SuborKeyboard::LoadState(State::Loader& loader,const dword id)
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{
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if (id == AsciiId<'S','K'>::V)
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{
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const uint data = loader.Read8();
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mode = data & 0x1;
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scan = data >> 1 & 0xF;
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if (scan > 12)
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scan = 0;
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}
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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 SuborKeyboard::Poke(const uint data)
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{
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if (data & COMMAND_KEY)
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{
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const uint out = data & COMMAND_SCAN;
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if (mode && !out && ++scan > 12)
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scan = 0;
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mode = out >> 1;
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if (data & COMMAND_RESET)
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scan = 0;
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}
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}
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uint SuborKeyboard::Peek(uint port)
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{
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if (port == 0)
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{
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return 0x00;
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}
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else if (input && scan < 10)
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{
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Controllers::SuborKeyboard::callback( input->suborKeyboard, scan, mode );
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return ~uint(input->suborKeyboard.parts[scan]) & 0x1E;
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}
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else
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{
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return 0x1E;
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}
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}
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}
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}
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}
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