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oldlinux-files/docs/interrupts/int-html/rb-4141.htm
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<TITLE>Int 2A/AH=81h
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Int 2A/AH=81h - NETWORK - END DOS CRITICAL SECTION -
AH = 81h
AL = critical section number (00h-0Fh) (see #02555)
Notes: normally hooked rather than called
the handler should reawaken any tasks which were suspended due to an
attempt to enter the specified critical section
MS Windows patches the DOS kernel's calls to INT 2A/AH=80h-81h into
far calls to its own handler, and does not reflect the calls back
to INT 2A unless SYSTEM.INI contains ReflectDOSInt2A=1 or
ModifyDOSInt2A=0 in the [386Enh] section
SeeAlso: AH=80h,AH=82h,AX=8700h
">
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<h2>Int 2A/AH=81h
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<h3><font color=#C00040>NETWORK - END DOS CRITICAL SECTION</font></h3>
<PRE>
AH = 81h
AL = critical section number (00h-0Fh) <a href="rb-4140.htm#Table2555" tppabs="http://www.ctyme.com/intr/rb-4140.htm#Table2555">(see #02555)</a>
</PRE>
<p><b>Notes:</b>
Normally hooked rather than called.
The handler should reawaken any tasks which were suspended due to an
attempt to enter the specified critical section.
MS Windows patches the DOS kernel's calls to INT 2A/AH=80h-81h into
far calls to its own handler, and does not reflect the calls back
to INT 2A unless SYSTEM.INI contains ReflectDOSInt2A=1 or
ModifyDOSInt2A=0 in the [386Enh] section
<p><b>See Also:</b>
<a href="rb-4140.htm" tppabs="http://www.ctyme.com/intr/rb-4140.htm">AH=80h</a> - <a href="rb-4142.htm" tppabs="http://www.ctyme.com/intr/rb-4142.htm">AH=82h</a> - <a href="rb-4145.htm" tppabs="http://www.ctyme.com/intr/rb-4145.htm">AX=8700h</a>
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<b>Category: <a href="cat-010.htm" tppabs="http://www.ctyme.com/intr/cat-010.htm">
DOS Kernel</a>
- <a href="int-2a-1.htm" tppabs="http://www.ctyme.com/intr/int-2A.htm">
Int 2Ah</a>
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N</a>
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