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// license:BSD-3-Clause
// copyright-holders:Sandro Ronco
/**********************************************************************
Hitachi HD64610 Real Time Clock
**********************************************************************
_____ _____
GND 1 |* \_/ | 24 Vcc
H-Start/Stop 2 | | 23 OSC2
_IRQ 3 | | 22 OSC1
1Hz 4 | HD64610 | 21 GND
A3 5 | | 20 _WE
A2 6 | | 19 _OE
A1 7 | | 18 _CS
A0 8 | | 17 I/O8
I/O1 9 | | 16 I/O7
I/O2 10 | | 15 I/O6
I/O3 11 | | 14 I/O5
GND 12 |_____________| 13 I/O4
**********************************************************************/
#ifndef MAME_MACHINE_HD64610_H
#define MAME_MACHINE_HD64610_H
#pragma once
#include "dirtc.h"
class hd64610_device : public device_t,
public device_rtc_interface,
public device_nvram_interface
{
public:
// construction/destruction
hd64610_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
auto irq() { return m_out_irq_cb.bind(); }
auto clkout() { return m_out_1hz_cb.bind(); }
uint8_t read(offs_t offset);
void write(offs_t offset, uint8_t data);
// hardware start/stop line
void h_w(int state);
protected:
// device-level overrides
virtual void device_start() override;
// device_rtc_interface overrides
virtual void rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second) override;
// device_nvram_interface overrides
virtual void nvram_default() override;
virtual bool nvram_read(util::read_stream &file) override;
virtual bool nvram_write(util::write_stream &file) override;
TIMER_CALLBACK_MEMBER(update_counter);
private:
void set_irq_line();
uint8_t read_counter(int counter);
void write_counter(int counter, uint8_t value);
void check_alarm();
devcb_write_line m_out_irq_cb;
devcb_write_line m_out_1hz_cb;
uint8_t m_regs[0x10]; // Internal registers
int m_hline_state; // H-Start/Stop line
int m_irq_out; // alarm output
emu_timer *m_counter_timer;
};
DECLARE_DEVICE_TYPE(HD64610, hd64610_device)
#endif // MAME_MACHINE_HD64610_H
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