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-rw-r--r--src/devices/machine/ds1207.h122
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diff --git a/src/devices/machine/ds1207.h b/src/devices/machine/ds1207.h
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+// license:BSD-3-Clause
+// copyright-holders:Paul-Arnold
+/*
+ * ds1207.h
+ *
+ * Time Key
+ *
+ */
+
+#ifndef MAME_MACHINE_DS1207_H
+#define MAME_MACHINE_DS1207_H
+
+#pragma once
+
+#include "dirtc.h"
+
+class ds1207_device : public device_t, public device_nvram_interface, public device_rtc_interface
+{
+public:
+ // construction/destruction
+ ds1207_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
+
+ void write_rst(int state);
+ void write_clk(int state);
+ void write_dq(int state);
+ int read_dq();
+
+protected:
+ // device-level overrides
+ virtual void device_start() override ATTR_COLD;
+ virtual void device_reset() override ATTR_COLD;
+
+ // 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;
+
+ // device_rtc_interface overrides
+ virtual bool rtc_feature_y2k() const override { return true; }
+ virtual bool rtc_feature_leap_year() const override { return true; }
+ virtual void rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second) override;
+
+private:
+ void new_state(uint8_t state);
+ void writebit(uint8_t *buffer);
+ void readbit(uint8_t *buffer);
+ void set_start_time();
+ void adjust_days_left();
+ void adjust_time_into_day();
+
+ enum state_t
+ {
+ STATE_STOP,
+ STATE_PROTOCOL,
+ STATE_READ_IDENTIFICATION,
+ STATE_WRITE_IDENTIFICATION,
+ STATE_WRITE_COMPARE_REGISTER,
+ STATE_WRITE_SECURITY_MATCH,
+ STATE_READ_SECURE_MEMORY,
+ STATE_WRITE_SECURE_MEMORY,
+ STATE_OUTPUT_GARBLED_DATA,
+ STATE_READ_DAY_CLOCK,
+ STATE_READ_DAYS_REMAINING,
+ STATE_WRITE_DAYS_REMAINING
+ };
+
+ enum command_t
+ {
+ COMMAND_READ = 0x62,
+ COMMAND_WRITE = 0x9d,
+ COMMAND_READ_DAY_CLOCK = 0xf1,
+ COMMAND_WRITE_DAYS_REMAINING = 0xf2,
+ COMMAND_READ_DAYS_REMAINING = 0xf3,
+ COMMAND_STOP_OSCILLATOR = 0xf4,
+ COMMAND_ARM_OSCILLATOR = 0xf5,
+ COMMAND_LOCK_DAYS_COUNT = 0xf6
+ };
+
+ enum cycle_t
+ {
+ CYCLE_NORMAL = 1,
+ CYCLE_PROGRAM = 2,
+ CYCLE_MASK = 3
+ };
+
+ enum device_state_t
+ {
+ OSC_ENABLED = 1,
+ OSC_RUNNING = 2,
+ DAYS_LOCKED = 4,
+ DAYS_EXPIRED = 8
+ };
+
+ static const int8_t DQ_HIGH_IMPEDANCE = -1;
+
+ optional_memory_region m_region;
+
+ uint8_t m_rst;
+ uint8_t m_clk;
+ uint8_t m_dqw;
+ int8_t m_dqr;
+ uint8_t m_state;
+ uint16_t m_bit;
+ uint64_t m_startup_time;
+ uint64_t m_last_update_time;
+ uint8_t m_command[3];
+ uint8_t m_day_clock[3];
+ uint8_t m_compare_register[8];
+ uint8_t m_unique_pattern[2];
+ uint8_t m_identification[8];
+ uint8_t m_security_match[8];
+ uint8_t m_secure_memory[48];
+ uint8_t m_days_left[2];
+ uint8_t m_start_time[8];
+ uint8_t m_device_state;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(DS1207, ds1207_device)
+
+#endif // MAME_MACHINE_DS1207_H