1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
// 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);
DECLARE_WRITE_LINE_MEMBER(write_rst);
DECLARE_WRITE_LINE_MEMBER(write_clk);
DECLARE_WRITE_LINE_MEMBER(write_dq);
DECLARE_READ_LINE_MEMBER(read_dq);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// 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
|