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 <p>
 PowerPC-based Macintosh systems are divided into <i>"Old World"</i> and
 <i>"New World"</i> systems, the difference being
-<a href="http://developer.apple.com/technotes/tn/tn1167.html">the design
-of the system ROM</a>.
+<a href="https://web.archive.org/web/20041011114718/http://developer.apple.com/technotes/tn/tn1167.html">
+the design of the system ROM</a>.
 Only <i>"New World"</i> machines are currently supported. 
 Known compatible systems include the following: