161 lines
11 KiB
HTML
161 lines
11 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>Int 71
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</TITLE>
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<META NAME="Description" CONTENT="
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Int 71 - IRQ9 - REDIRECTED TO INT 0A BY BIOS -
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Notes: may be masked by setting bit 1 on I/O port A1h
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the default BIOS handler invokes INT 0A for compatibility, since the
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pin for IRQ2 on the PC expansion bus became the pin for IRQ9 on the
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AT expansion bus.
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under DESQview, only the INT 15h vector and BASIC segment address (the
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word at 0000h:0510h) may be assumed to be valid for the handler's
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process
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SeeAlso: INT 0AIRQ2,INT 59IRQ9,MEM 0040h:006Bh
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">
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<META NAME="robots" CONTENT="none">
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</HEAD>
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<BODY BGCOLOR="#FFD0A0">
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<center>
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<h2>Int 71
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</h2>
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</center><p>
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<table border=1 cellpadding=3 cellspacing=1>
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<td>
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<td><a href="int.htm" tppabs="http://www.ctyme.com/intr/int.htm">Interrups</a></td>
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<td><a href="cat.htm" tppabs="http://www.ctyme.com/intr/cat.htm">Categories</a></td>
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<td><a href="alpha.htm" tppabs="http://www.ctyme.com/intr/alpha.htm">Contents</a></td>
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</td></table><p>
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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>IRQ9 - REDIRECTED TO INT 0A BY BIOS</font></h3>
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<p><b>Notes:</b>
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May be masked by setting bit 1 on I/O port A1h.
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The default BIOS handler invokes INT 0A for compatibility, since the
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pin for IRQ2 on the PC expansion bus became the pin for IRQ9 on the
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AT expansion bus..
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Under DESQview, only the INT 15h vector and BASIC segment address (the
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word at 0000h:0510h) may be assumed to be valid for the handler's
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process
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<p><b>See Also:</b>
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<a href="rb-0048.htm" tppabs="http://www.ctyme.com/intr/rb-0048.htm">INT 0A"IRQ2"</a> - <a href="rb-6367.htm" tppabs="http://www.ctyme.com/intr/rb-6367.htm">INT 59"IRQ9"</a> - MEM 0040h:006Bh
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<p>
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<b>Category: <a href="cat-019.htm" tppabs="http://www.ctyme.com/intr/cat-019.htm">
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Hardware</a>
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- <a href="int-71.htm" tppabs="http://www.ctyme.com/intr/int-71.htm">
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Int 71h</a>
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- <a href="alpha-i.htm" tppabs="http://www.ctyme.com/intr/alpha-i.htm">
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I</a>
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</b><p><p><img src="rbline.gif" tppabs="http://graphics.ctyme.com/gif/rbline.gif" width="100%" alt="------"><p>
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<img src="lup.gif" tppabs="http://graphics.ctyme.com/gif/lup.gif" border=0 alt=Prev></a>
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<img src="ldown.gif" tppabs="http://graphics.ctyme.com/gif/ldown.gif" border=0 alt=Next></a>
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<img src="lhome.gif" tppabs="http://graphics.ctyme.com/gif/lhome.gif" border=0 alt=Ralf Brown Page></a>
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<td><a href="int.htm" tppabs="http://www.ctyme.com/intr/int.htm">Interrups</a></td>
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<td><a href="alpha.htm" tppabs="http://www.ctyme.com/intr/alpha.htm">Contents</a></td>
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</td></table><p>
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