118 lines
2.6 KiB
Text
118 lines
2.6 KiB
Text
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/*
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* This file is part of libsidplayfp, a SID player engine.
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*
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* Copyright 2011-2014 Leandro Nini <drfiemost@users.sourceforge.net>
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* Copyright 2009-2014 VICE Project
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* Copyright 2007-2010 Antti Lankila
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* Copyright 2000 Simon White
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*
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* This program 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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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef TOD_H
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#define TOD_H
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#include <stdint.h>
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#include "sidplayfp/event.h"
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namespace libsidplayfp
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{
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class MOS6526;
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/**
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* TOD implementation taken from Vice.
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*/
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class Tod : private Event
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{
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private:
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enum
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{
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TENTHS = 0,
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SECONDS = 1,
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MINUTES = 2,
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HOURS = 3
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};
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private:
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/// Event context.
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EventContext &event_context;
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/// Pointer to the MOS6526 which this Timer belongs to.
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MOS6526* const parent;
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event_clock_t cycles;
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event_clock_t period;
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uint8_t clock[4];
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uint8_t latch[4];
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uint8_t alarm[4];
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const uint8_t &cra;
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const uint8_t &crb;
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bool isLatched;
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bool isStopped;
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private:
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inline void checkAlarm();
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void event();
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public:
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Tod(EventContext *context, MOS6526* parent, uint8_t regs[0x10]) :
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Event("CIA Time of Day"),
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event_context(*context),
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parent(parent),
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period(~0), // Dummy
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cra(regs[0x0e]),
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crb(regs[0x0f]) {}
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/**
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* Reset TOD.
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*/
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void reset();
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/**
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* Read TOD register.
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*
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* @param addr
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* register register to read
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*/
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uint8_t read(uint_least8_t reg);
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/**
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* Write TOD register.
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*
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* @param addr
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* register to write
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* @param data
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* value to write
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*/
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void write(uint_least8_t reg, uint8_t data);
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/**
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* Set TOD period.
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*
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* @param clock
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*/
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void setPeriod(event_clock_t clock) { period = clock * (1 << 7); }
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};
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}
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#endif
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