mirror of
https://github.com/holub/mame
synced 2025-06-03 19:36:26 +03:00
92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
/***************************************************************************
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MSM6242 Real Time Clock
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Copyright Nicola Salmoria and the MAME Team.
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Visit http://mamedev.org for licensing and usage restrictions.
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***************************************************************************/
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#pragma once
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#ifndef __MSM6242DEV_H__
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#define __MSM6242DEV_H__
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#include "emu.h"
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#define MCFG_MSM6242_ADD(_tag, _config) \
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MCFG_DEVICE_ADD(_tag, msm6242, XTAL_32_768kHz) \
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MCFG_DEVICE_CONFIG(_config)
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#define MSM6242_INTERFACE(name) \
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const msm6242_interface (name) =
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// ======================> msm6242_interface
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struct msm6242_interface
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{
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devcb_write_line m_out_int_func;
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};
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// ======================> msm6242_device
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class msm6242_device : public device_t, public device_rtc_interface
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{
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public:
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// construction/destruction
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msm6242_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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// I/O operations
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DECLARE_WRITE8_MEMBER( write );
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DECLARE_READ8_MEMBER( read );
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protected:
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// device-level overrides
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virtual void device_start();
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virtual void device_reset();
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virtual void device_pre_save();
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virtual void device_post_load();
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virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
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// rtc overrides
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virtual void rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second);
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private:
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static const int RTC_TICKS = ~0;
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static const UINT8 IRQ_64THSECOND = 0;
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static const UINT8 IRQ_SECOND = 1;
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static const UINT8 IRQ_MINUTE = 2;
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static const UINT8 IRQ_HOUR = 3;
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// state
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UINT8 m_reg[3];
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UINT8 m_irq_flag;
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UINT8 m_irq_type;
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UINT16 m_tick;
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// incidentals
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devcb_resolved_write_line m_res_out_int_func;
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emu_timer * m_timer;
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UINT64 m_last_update_time; // last update time, in clock cycles
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// methods
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void rtc_timer_callback();
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UINT64 current_time();
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void irq(UINT8 irq_type);
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UINT64 bump(int rtc_register, UINT64 delta, UINT64 register_min, UINT64 register_range);
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void update_rtc_registers();
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void update_timer();
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UINT8 get_clock_nibble(int rtc_register, bool high);
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static const char *irq_type_string(UINT8 irq_type);
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};
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// device type definition
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extern const device_type msm6242;
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#endif /* __MSM6242DEV_H__ */
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