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/***************************************************************************
MSM6242 Real Time Clock
Copyright Nicola Salmoria and the MAME Team.
Visit http://mamedev.org for licensing and usage restrictions.
***************************************************************************/
#pragma once
#ifndef __MSM6242DEV_H__
#define __MSM6242DEV_H__
#include "emu.h"
#define MCFG_MSM6242_ADD(_tag, _config) \
MCFG_DEVICE_ADD(_tag, msm6242, XTAL_32_768kHz) \
MCFG_DEVICE_CONFIG(_config)
#define MSM6242_INTERFACE(name) \
const msm6242_interface (name) =
// ======================> msm6242_interface
struct msm6242_interface
{
devcb_write_line m_out_int_func;
};
// ======================> msm6242_device
class msm6242_device : public device_t, public device_rtc_interface
{
public:
// construction/destruction
msm6242_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// I/O operations
DECLARE_WRITE8_MEMBER( write );
DECLARE_READ8_MEMBER( read );
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual void device_pre_save();
virtual void device_post_load();
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
// rtc overrides
virtual void rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second);
private:
static const int RTC_TICKS = ~0;
static const UINT8 IRQ_64THSECOND = 0;
static const UINT8 IRQ_SECOND = 1;
static const UINT8 IRQ_MINUTE = 2;
static const UINT8 IRQ_HOUR = 3;
// state
UINT8 m_reg[3];
UINT8 m_irq_flag;
UINT8 m_irq_type;
UINT16 m_tick;
// incidentals
devcb_resolved_write_line m_res_out_int_func;
emu_timer * m_timer;
UINT64 m_last_update_time; // last update time, in clock cycles
// methods
void rtc_timer_callback();
UINT64 current_time();
void irq(UINT8 irq_type);
UINT64 bump(int rtc_register, UINT64 delta, UINT64 register_min, UINT64 register_range);
void update_rtc_registers();
void update_timer();
UINT8 get_clock_nibble(int rtc_register, bool high);
static const char *irq_type_string(UINT8 irq_type);
};
// device type definition
extern const device_type msm6242;
#endif /* __MSM6242DEV_H__ */
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