Documentation updates

docs/pcjs/parallel/README.md

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+---
+layout: page
+title: PCjs <parallel> Element
+permalink: /docs/pcjs/parallel/
+---
+
+PCjs ParallelPort Component
+---
+
+Format
+---
+	<parallel>...</parallel>
+
+Purpose
+---
+Creates an instance of the ParallelPort component, which simulates an IBM PC Parallel Printer Adapter.
+
+Attributes
+---
+ * *adapter* (required)
+
+	A number (1, 2, or 3) indicating whether this adapter uses port 0x3BC, 0x378, or 0x278.  Adapters 1 and 2
+	default to IRQ 7, and adapter 3 defaults to IRQ 5.
+	
+ * *binding* (optional)
+ 
+	The name of an existing control binding (typically a &lt;textarea&gt;) to optionally redirect port I/O to.
+	For example, if you've defined a Control Panel with a &lt;textarea&gt; control bound to "print", specifying a
+	binding of "print" for the Parallel Port component will bind its port to the same control.
+	
+Also supports the attributes of *[Component](/docs/pcjs/component/)*.
+
+Bindings
+---
+ * *buffer*
+ 
+	For use with a control of type "textarea", to send/receive data to/from the port. If you would rather
+	bind the port to an existing control, then use *binding* attribute instead (see above).
+
+Example
+---
+	<parallel id="lpt1" adapter="1" binding="print"/>
+
+Output
+---
+	<div id="..." class="pc-parallel pc-component">
+		<div class="pc-container">
+			<div class="pcjs-parallel" data-value="id:'...',name:'...',adapter:'...',binding:'...'"></div>
+		</div>
+	</div>
+
+[Return to [PCjs Documentation](..)]