75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
/*
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AppleWin : An Apple //e emulator for Windows
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Copyright (C) 1994-1996, Michael O'Brien
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Copyright (C) 1999-2001, Oliver Schmidt
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Copyright (C) 2002-2005, Tom Charlesworth
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Copyright (C) 2006-2010, Tom Charlesworth, Michael Pohoreski, Nick Westgate
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AppleWin 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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AppleWin 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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You should have received a copy of the GNU General Public License
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along with AppleWin; 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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/* Description: No Slot Clock/Phantom Clock (Dallas SmartWatch DS1216) emulation
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*
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* Author: Nick Westgate
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*/
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#pragma once
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class CNoSlotClock
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{
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class RingRegister64
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{
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public:
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RingRegister64();
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RingRegister64(UINT64 data);
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void Reset();
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void WriteNibble(int data);
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void WriteBits(int data, int count);
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void WriteBit(int data);
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void ReadBit(BYTE& data);
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bool CompareBit(int data);
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bool NextBit();
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UINT64 m_Mask;
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UINT64 m_Register;
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};
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public:
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CNoSlotClock();
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void Reset();
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bool ReadWrite(int address, BYTE& data, BYTE write);
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bool ClockRead(BYTE& data);
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void ClockWrite(int address);
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void SaveSnapshot(class YamlSaveHelper& yamlSaveHelper);
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void LoadSnapshot(class YamlLoadHelper& yamlLoadHelper);
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bool m_bClockRegisterEnabled;
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bool m_bWriteEnabled;
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RingRegister64 m_ClockRegister;
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RingRegister64 m_ComparisonRegister;
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private:
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bool Read(int address, BYTE& data);
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void Write(int address);
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void PopulateClockRegister();
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const std::string& GetSnapshotStructName(void);
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static const UINT64 kClockInitSequence = 0x5CA33AC55CA33AC5;
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};
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