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oldlinux-files/docs/interrupts/int-html/rb-1525.htm
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<TITLE>Int 15/AH=86h
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Int 15/AH=86h - BIOS - WAIT (AT,PS) -
AH = 86h
CX:DX = interval in microseconds
Return: CF clear if successful (wait interval elapsed)
CF set on error or AH=83h wait already in progress
AH = status (see #00496)
Note: the resolution of the wait period is 977 microseconds on many systems
because many BIOSes use the 1/1024 second fast interrupt from the AT
real-time clock chip which is available on INT 70; because newer
BIOSes may have much more precise timers available, it is not
possible to use this function accurately for very short delays unless
">
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<h2>Int 15/AH=86h
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<h3><font color=#C00040>BIOS - WAIT (AT,PS)</font></h3>
<PRE>
AH = 86h
CX:DX = interval in microseconds<br>
<p><b>Return:</b><br>CF clear if successful (wait interval elapsed)
CF set on error or AH=83h wait already in progress
AH = status <a href="rb-1506.htm#Table496" tppabs="http://www.ctyme.com/intr/rb-1506.htm#Table496">(see #00496)</a>
</PRE>
<p><b>Note:</b>
The resolution of the wait period is 977 microseconds on many systems
because many BIOSes use the 1/1024 second fast interrupt from the AT
real-time clock chip which is available on INT 70; because newer
BIOSes may have much more precise timers available, it is not
possible to use this function accurately for very short delays unless
the precise behavior of the BIOS is known (or found through testing)
<p><b>See Also:</b>
<a href="rb-1355.htm" tppabs="http://www.ctyme.com/intr/rb-1355.htm">AH=41h</a> - <a href="rb-1512.htm" tppabs="http://www.ctyme.com/intr/rb-1512.htm">AH=83h</a> - <a href="rb-2437.htm" tppabs="http://www.ctyme.com/intr/rb-2437.htm">INT 1A/AX=FF01h</a> - <a href="rb-7797.htm" tppabs="http://www.ctyme.com/intr/rb-7797.htm">INT 70</a>
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Bios</a>
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Int 15h</a>
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