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study/sabre/os/files/ProtectedMode/DPMI1.0Spec/api/310201.html

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+<h2>Set Real Mode Interrupt Vector
+<img src="../0.9.gif" alt="[0.9]" width=22 height=17></h2>
+
+Sets the current virtual machine's real mode interrupt
+vector for the specified interrupt.<p>
+
+<b>Call With</b><br>
+<img src="r/ax+bl+cx+dx.gif" alt="" width=245 height=59><br>
+
+AX     = 0201H<br>
+BL     = interrupt number<br>
+CX:DX  = segment:offset of real mode interrupt handler<p>
+
+<b>Returns</b><br>
+<img src="r/c.gif" alt="" width=245 height=59><br>
+
+Carry flag = clear (this function always succeeds)<p>
+
+<h2>Notes</h2><ul>
+
+<li>The address passed in CX must be a real mode segment address, not
+a selector.  Consequently, the interrupt handler must either reside in
+DOS memory (i.e. below the 1 MB boundary) or the client must allocate
+a real mode callback address.  See <a href="310100.html">Int 31H
+Functions 0100H</a> and <a href="310303.html">0303H</a>.<p>
+
+<li>If the interrupt being hooked is a hardware interrupt, the memory
+that the interrupt handler uses must be locked.<p>
+
+</ul>
+
+