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xmlns:o="urn:schemas-microsoft-com:office:office" |
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xmlns:w="urn:schemas-microsoft-com:office:word" |
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xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" |
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xmlns="http://www.w3.org/TR/REC-html40"> |
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Back
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style='mso-ansi-language:RU'> to main |
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style='mso-bidi-font-weight:normal'> |
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Function 22 -
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set the system date / time |
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Options:
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* eax = 22
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- function number |
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* ebx = 0
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- set the time |
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* ecx
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= 0x00SSMMHH - time in binary coded decimal code (BCD): |
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* HH = hour 00..23
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* MM = minute 00..59
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* SS = second 00..59
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* ebx = 1
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- set the date |
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* ecx
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= 0x00DDMMYY - the date in the binary decimal code (BCD): |
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* DD = day 01..31
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* MM = month 01..12
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* YY = year 00..99
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* ebx = 2
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- set the day of the week |
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* ecx
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= 1 for sunday, ..., 7 for saturday |
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* ebx = 3
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- set the alarm |
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* ecx
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= 0x00SSMMHH |
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Return value:
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* eax = 0
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- successful |
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* eax = 1
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- the parameter is set incorrectly |
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* eax = 2
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- CMOS-batteries are out |
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Remarks:
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The value of the
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installation of the day of the week seems doubtful, since it is not used very |
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much (the day of the week can be calculated by date). |
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The alarm can be set
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to operate at a specified time every day. At the same time, it cannot be |
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disabled by the existing system functions. |
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The alarm is
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triggered by the generation of IRQ8. |
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In fact, CMOS supports
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setting the value 0xFF as one of the parameters for an alarm and means that the |
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corresponding parameter is ignored. But in the current implementation it will |
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not work (return value 1). |
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Alarm clock is a
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global system resource; setting the alarm automatically cancels the previous |
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setting. However, at the moment no program uses it. |
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Constants for registers:
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eax -
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SF_SET_TIME_DATE (22) |
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