171 lines
11 KiB
HTML
171 lines
11 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>Int 1A/AH=06h
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</TITLE>
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<META NAME="Description" CONTENT="
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Int 1A/AH=06h - TIME - SET ALARM (AT,XT286,PS) -
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AH = 06h
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CH = hour (BCD)
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CL = minutes (BCD)
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DH = seconds (BCD)
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Return: CF set on error (alarm already set or clock stopped for update)
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CF clear if successful
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Notes: the alarm occurs every 24 hours until turned off, invoking INT 4A each
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time
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the BIOS does not check for invalid values for the time, so the CMOS
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clock chip's don't care setting (any values between C0h and FFh)
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">
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<BODY BGCOLOR="#FFD0A0">
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<center>
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<h2>Int 1A/AH=06h
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</h2>
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<p><img src="rbline.gif" tppabs="http://graphics.ctyme.com/gif/rbline.gif" width="100%" alt="------"><p>
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<h3><font color=#C00040>TIME - SET ALARM (AT,XT286,PS)</font></h3>
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<PRE>
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AH = 06h
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CH = hour (BCD)
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CL = minutes (BCD)
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DH = seconds (BCD)<br>
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<p><b>Return:</b><br>CF set on error (alarm already set or clock stopped for update)
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CF clear if successful
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</PRE>
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<p><b>Notes:</b>
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The alarm occurs every 24 hours until turned off, invoking INT 4A each
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time.
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The BIOS does not check for invalid values for the time, so the CMOS
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clock chip's "don't care" setting (any values between C0h and FFh)
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may be used for any or all three parts. For example, to create an
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alarm once a minute, every minute, call with CH=FFh, CL=FFh, and
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DH=00h.
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<p><b>See Also:</b>
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<a href="rb-2283.htm" tppabs="http://www.ctyme.com/intr/rb-2283.htm">AH=07h</a> - <a href="rb-2288.htm" tppabs="http://www.ctyme.com/intr/rb-2288.htm">AH=0Ch</a> - <a href="rb-6244.htm" tppabs="http://www.ctyme.com/intr/rb-6244.htm">INT 4A"SYSTEM"</a>
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<p>
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<b>Category: <a href="cat-003.htm" tppabs="http://www.ctyme.com/intr/cat-003.htm">
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Bios</a>
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- <a href="int-1a-1.htm" tppabs="http://www.ctyme.com/intr/int-1A.htm">
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Int 1Ah</a>
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T</a>
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