48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
#ifndef _RTCLOCKB_H_
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#define _RTCLOCKB_H_
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/* clock used in the A2000, according to info I got from
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Harald Backert. */
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struct rtclock2000 {
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u_int :28, second2:4; /* lower digit */
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u_int :28, second1:4; /* upper digit */
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u_int :28, minute2:4; /* lower digit */
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u_int :28, minute1:4; /* upper digit */
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u_int :28, hour2:4; /* lower digit */
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u_int :28, hour1:4; /* upper digit */
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u_int :28, day2:4; /* lower digit */
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u_int :28, day1:4; /* upper digit */
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u_int :28, month2:4; /* lower digit */
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u_int :28, month1:4; /* upper digit */
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u_int :28, year2:4; /* lower digit */
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u_int :28, year1:4; /* upper digit */
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u_int :28, week:4; /* week */
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u_int :28, control1:4; /* control-byte 1 */
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u_int :28, control2:4; /* control-byte 2 */
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u_int :28, control3:4; /* control-byte 3 */
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};
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/* commands written to control1, HOLD before reading the clock,
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FREE after done reading. */
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#define CONTROL1_HOLD (1<<0)
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#define CONTROL1_BUSY (1<<1)
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#define CONTROL3_24HMODE (1<<2)
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#define HOUR1_PM (1<<2)
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#define FEBRUARY 2
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#define STARTOFTIME 1970
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#define SECDAY 86400L
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#define SECYR (SECDAY * 365)
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#define leapyear(year) ((year) % 4 == 0)
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#define range_test(n, l, h) if ((n) < (l) || (n) > (h)) return(0)
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#define days_in_year(a) (leapyear(a) ? 366 : 365)
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#define days_in_month(a) (month_days[(a) - 1])
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#endif /* _RTCLOCKB_H_ */
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