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+/*********************************************************************
+
+ mc146818.h
+
+ Implementation of the MC146818 chip
+
+ Real time clock chip with batteru buffered ram
+ Used in IBM PC/AT, several PC clones, Amstrad NC200
+
+ Peter Trauner (peter.trauner@jk.uni-linz.ac.at)
+
+*********************************************************************/
+
+#ifndef __MC146818_H__
+#define __MC146818_H__
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_MC146818_IRQ_ADD(_tag, _type, _intrf) \
+ MCFG_DEVICE_ADD(_tag, MC146818, 0) \
+ mc146818_device::static_set_type(*device, mc146818_device::_type); \
+ MCFG_DEVICE_CONFIG(_intrf)
+
+#define MCFG_MC146818_ADD(_tag, _type) \
+ MCFG_DEVICE_ADD(_tag, MC146818, 0) \
+ mc146818_device::static_set_type(*device, mc146818_device::_type);
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> mc146818_interface
+
+struct mc146818_interface
+{
+ devcb_write_line m_out_irq_cb;
+};
+
+// ======================> mc146818_device
+
+class mc146818_device : public device_t,
+ public device_rtc_interface,
+ public device_nvram_interface,
+ public mc146818_interface
+{
+public:
+ // values
+ enum mc146818_type
+ {
+ MC146818_STANDARD,
+ MC146818_IGNORE_CENTURY, // century is NOT set, for systems having other usage of this byte
+ MC146818_ENHANCED,
+ MC146818_UTC
+ };
+
+ // construction/destruction
+ mc146818_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // inline configuration helpers
+ static void static_set_type(device_t &device, mc146818_type type);
+
+ // read/write access
+ DECLARE_READ8_MEMBER( read );
+ DECLARE_WRITE8_MEMBER( write );
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_config_complete();
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+
+ // device_rtc_interface overrides
+ virtual void rtc_set_time(int year, int month, int day, int day_of_week, int hour, int minute, int second);
+ virtual bool rtc_is_year_2000_compliant() { return false; }
+
+ // device_nvram_interface overrides
+ virtual void nvram_default();
+ virtual void nvram_read(emu_file &file);
+ virtual void nvram_write(emu_file &file);
+
+ // internal helpers
+ int dec_2_local(int a);
+ void set_base_datetime();
+
+ // internal state
+ static const int MC146818_DATA_SIZE = 0x80;
+
+ mc146818_type m_type;
+
+ UINT8 m_index;
+ UINT8 m_data[MC146818_DATA_SIZE];
+
+ UINT16 m_eindex;
+ UINT8 m_edata[0x2000];
+
+ bool m_updated; /* update ended interrupt flag */
+
+ attotime m_last_refresh;
+ attotime m_period;
+
+ static const device_timer_id TIMER_CLOCK = 0;
+ static const device_timer_id TIMER_PERIODIC = 1;
+
+ emu_timer *m_clock_timer;
+ emu_timer *m_periodic_timer;
+
+ devcb_resolved_write_line m_out_irq_func;
+};
+
+
+// device type definition
+extern const device_type MC146818;
+
+
+#endif /* __MC146818_H__ */