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-rw-r--r--src/emu/machine/pcf8593.h77
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diff --git a/src/emu/machine/pcf8593.h b/src/emu/machine/pcf8593.h
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+++ b/src/emu/machine/pcf8593.h
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+/*********************************************************************
+
+ Philips PCF8593 CMOS clock/calendar circuit
+
+ (c) 2001-2007 Tim Schuerewegen
+
+*********************************************************************/
+
+#ifndef __PCF8593_H__
+#define __PCF8593_H__
+
+#include "emu.h"
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_PCF8593_ADD(_tag) \
+ MCFG_DEVICE_ADD(_tag, PCF8593, 0)
+
+#define MCFG_PCF8593_REMOVE(_tag) \
+ MCFG_DEVICE_REMOVE(_tag)
+
+
+// ======================> pcf8593_device
+
+class pcf8593_device : public device_t,
+ public device_rtc_interface,
+ public device_nvram_interface
+{
+public:
+ pcf8593_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ DECLARE_WRITE_LINE_MEMBER(scl_w);
+ DECLARE_WRITE_LINE_MEMBER(sda_w);
+ DECLARE_READ_LINE_MEMBER(sda_r);
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+
+ // device_rtc_interface overrides
+ virtual bool rtc_feature_y2k() { return true; }
+ virtual void rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second);
+
+ // device_nvram_interface overrides
+ virtual void nvram_default();
+ virtual void nvram_read(emu_file &file);
+ virtual void nvram_write(emu_file &file);
+
+private:
+ void clear_buffer_rx();
+
+ static const device_timer_id TIMER_UPDATE_COUNTER = 0;
+
+ // internal state
+ UINT8 m_data[16];
+ int m_pin_scl;
+ int m_pin_sda;
+ int m_inp;
+ int m_active;
+ int m_bits;
+ UINT8 m_data_recv_index;
+ UINT8 m_data_recv[50];
+ UINT8 m_mode;
+ UINT8 m_pos;
+ emu_timer * m_timer;
+ enum { RTC_MODE_NONE, RTC_MODE_SEND, RTC_MODE_RECV };
+};
+
+// device type definition
+extern const device_type PCF8593;
+
+#endif /* __PCF8593_H__ */