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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Ricoh RP5C01(A) Real Time Clock With Internal RAM emulation
**********************************************************************
_____ _____
_CS 1 |* \_/ | 18 Vcc
CS 2 | | 17 OSCOUT
ADJ 3 | | 16 OSCIN
A0 4 | RP5C01 | 15 _ALARM
A1 5 | RP5C01A | 14 D3
A2 6 | RF5C01A | 13 D2
A3 7 | TC8521 | 12 D1
_RD 8 | | 11 D0
GND 9 |_____________| 10 _WR
**********************************************************************/
#ifndef MAME_MACHINE_RP5C01_H
#define MAME_MACHINE_RP5C01_H
#pragma once
#include "dirtc.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> rp5c01_device
class rp5c01_device : public device_t,
public device_rtc_interface,
public device_nvram_interface
{
public:
// construction/destruction
rp5c01_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
auto out_alarm_callback() { return m_out_alarm_cb.bind(); }
void remove_battery() { m_battery_backed = false; nvram_enable_backup(false); }
uint8_t read(offs_t offset);
void write(offs_t offset, uint8_t data);
int alarm_r() { return m_alarm; }
void adj_w(int state) { if (state) adjust_seconds(); }
protected:
// construction/destruction
rp5c01_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, const XTAL &clock);
// device-level overrides
virtual void device_start() override;
// device_rtc_interface overrides
virtual bool rtc_feature_leap_year() const override { return true; }
virtual bool rtc_battery_backed() const override { return m_battery_backed; }
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(advance_1hz_clock);
TIMER_CALLBACK_MEMBER(advance_16hz_clock);
private:
inline void set_alarm_line();
inline int read_counter(int counter);
inline void write_counter(int counter, int value);
inline void check_alarm();
devcb_write_line m_out_alarm_cb;
bool m_battery_backed;
uint8_t m_reg[2][13]; // clock registers
uint8_t m_ram[13]; // RAM
uint8_t m_mode; // mode register
uint8_t m_reset; // reset register
int m_alarm; // alarm output
int m_alarm_on; // alarm condition
int m_1hz; // 1 Hz condition
int m_16hz; // 16 Hz condition
// timers
emu_timer *m_clock_timer;
emu_timer *m_16hz_timer;
};
// ======================> tc8521_device
class tc8521_device : public rp5c01_device
{
public:
// construction/destruction
tc8521_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
};
// device type definition
DECLARE_DEVICE_TYPE(RP5C01, rp5c01_device)
DECLARE_DEVICE_TYPE(TC8521, tc8521_device)
#endif // MAME_MACHINE_RP5C01_H
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