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+<html><!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
+<html>
+
+	<head>
+		<title>80386 Programmer's Reference Manual -- Opcode IN</title>
+	</head>
+
+	<body>
+		<b>up:</b> <a href="C17.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/C17.HTM">Chapter 17 -- 80386 Instruction Set</a><br>
+		<b>prev:</b><a href="IMUL.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/IMUL.HTM"> IMUL Signed Multiply</a><br>
+		<b>next:</b><a href="INC.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/INC.HTM"> INC Increment by 1</a>
+		<p>
+		<hr>
+		<p>
+		<h1>IN -- Input from Port</h1>
+		<pre>
+
+
+
+Opcode    Instruction   Clocks            Description
+
+E4  ib    IN AL,imm8    12,pm=6*/26**     Input byte from immediate port
+                                          into AL
+E5  ib    IN AX,imm8    12,pm=6*/26**     Input word from immediate port
+                                          into AX
+E5  ib    IN EAX,imm8   12,pm=6*/26**     Input dword from immediate port
+                                          into EAX
+EC        IN AL,DX      13,pm=7*/27**     Input byte from port DX into AL
+ED        IN AX,DX      13,pm=7*/27**     Input word from port DX into AX
+ED        IN EAX,DX     13,pm=7*/27**     Input dword from port DX into
+                                          EAX
+</pre>
+		<em>
+		<h3>Notes</h3>
+		<pre>
+
+
+
+   *If CPL &lt;= IOPL
+  **If CPL &gt; IOPL or if in virtual 8086 mode
+</pre>
+		</em>
+		<h2>Operation</h2>
+		<pre>
+
+
+
+IF (PE = 1) AND ((VM = 1) OR (CPL &gt; IOPL))
+THEN (* Virtual 8086 mode, or protected mode with CPL &gt; IOPL *)
+   IF NOT I-O-Permission (SRC, width(SRC))
+   THEN #GP(0);
+   FI;
+FI;
+DEST := [SRC]; (* Reads from I/O address space *)
+</pre>
+		<h2>Description</h2>
+		IN transfers a data byte or data word from the port numbered by the second operand into the register (AL, AX, or EAX) specified by the first operand. Access any port from 0 to 65535 by placing the port number in the DX register and using an IN instruction with DX as the second parameter. These I/O instructions can be shortened by using an 8-bit port I/O in the instruction. The upper eight bits of the port address will be 0 when 8-bit port I/O is used.
+		<h2>Flags Affected</h2>
+		None
+		<h2>Protected Mode Exceptions</h2>
+		#GP(0) if the current privilege level is larger (has less privilege) than IOPL and any of the corresponding I/O permission bits in TSS equals 1
+		<h2>Real Address Mode Exceptions</h2>
+		None
+		<h2>Virtual 8086 Mode Exceptions</h2>
+		#GP(0) fault if any of the corresponding I/O permission bits in TSS equals 1
+		<p>
+		<hr>
+		<p><b>up:</b> <a href="C17.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/C17.HTM">Chapter 17 -- 80386 Instruction Set</a><br>
+		<b>prev:</b><a href="IMUL.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/IMUL.HTM"> IMUL Signed Multiply</a><br>
+		<b>next:</b><a href="INC.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/INC.HTM"> INC Increment by 1</a>
+	</body>
+