--- loncom/html/adm/help/tex/Clicker_Registration.tex	2007/07/05 21:37:31	1.1
+++ loncom/html/adm/help/tex/Clicker_Registration.tex	2007/07/07 01:34:29	1.2
@@ -36,3 +36,55 @@ The clicker ID is listed.
 \caption{Interwrite Step 5}
 \end{figure}
 
+{\bf Interwrite IR}: the clicker ID (6 digits) is located on a sticker on the back of the device.
+
+{\bf Interwrite Virtual}: The clicker ID is the Media Access Control address (``MAC address'') of your network card. MAC addresses look like this
+
+{\tt 01-23-45-67-89-ab}
+
+or like this
+
+{\tt 01:23:45:67:89:ab}
+
+How to locate this depends on your operating system.
+
+{\it Windows Vista}
+\begin{itemize}
+\item Click the Start Button and select Start Search.
+\item Type {\tt cmd} in the blank box. Hit Enter.
+\item In the command prompt window, type {\tt ipconfig /all}
+\item Locate the number that goes with the adapter you would use in the lecture hall.
+\end{itemize}
+
+{\it Windows NT / 2000 or XP}
+\begin{itemize}
+\item After clicking on the Start Button, click on Run.
+\item Type {\it command} in the blank box. Click on OK.
+\item Once a small black window appears, type in {\tt winipcfg}
+\item Locate the number to the right of ``Physical Address.''
+\end{itemize}
+
+{\it Windows 95/98/ME}
+\begin{itemize}
+\item After clicking on the Start Button, click on Run.
+\item Type in {\tt winipcfg} in the blank box. Click on ``OK.''
+\item Look under the info for the Ethernet adapter you would use in the lecture hall.
+\item Locate the number next to ``Adapter Address.''
+\end{itemize}
+
+{\it Macintosh (OS X)}
+\begin{itemize} 
+\item Under the Apple menu, select "System Preferences".
+\item Select the "Network" Pane.
+\item Doubleclick on the adapter you are using, for example ``Airport'' or ``Built-in Ethernet'' (use the adapter you would use in the lecture hall).
+\item Click on the ``Airport'' or ``Ethernet'' tab, respectively - the number is displayed.
+\end{itemize}
+
+{\it Linux}
+In order to find the MAC address of the ethernet device, you must first become root. Then, type {\tt /sbin/ifconfig -a} and look up the relevant info. For example:
+\begin{verbatim}
+[root@foo bar]# /sbin/ifconfig -a
+eth0 Link encap:Ethernet HWaddr 01:23:45:67:89:AB
+...
+\end{verbatim}
+The number is the HWaddr.