diff --git a/en_US.ISO8859-1/htdocs/platforms/ppc.sgml b/en_US.ISO8859-1/htdocs/platforms/ppc.sgml
index 85aeac8e62..4c8c003187 100644
--- a/en_US.ISO8859-1/htdocs/platforms/ppc.sgml
+++ b/en_US.ISO8859-1/htdocs/platforms/ppc.sgml
@@ -221,25 +221,25 @@ OK load /boot/kernel/kernel.save</pre>
     <li><a href="http://www.firmworks.com/QuickRef.html">
       Open Firmware Quick Reference</a></li>
 
-    <li><a href="http://developer.apple.com/technotes/tn/tn1061.html">
+    <li><a href="https://developer.apple.com/legacy/mac/library/#technotes/tn/tn1061.html">
       "TN1061: Fundamentals of Open Firmware, Part 1 - The User
       Interface"</a></li>
 
-    <li><a href="http://developer.apple.com/technotes/tn/tn1062.html">
+    <li><a href="https://developer.apple.com/legacy/mac/library/#technotes/tn/tn1062.html">
       "TN1062: Fundamentals of Open Firmware, Part 2 - The Device
       Tree"</a></li>
 
-    <li><a href="http://developer.apple.com/techpubs/hardware/hardware2.html">
+    <li><a href="http://developer.apple.com/legacy/mac/library/navigation/">
       Apple hardware developer docs</a></li>
 
-    <li><a href="http://developer.apple.com/technotes/tn/tn2004.html">
+    <li><a href="http://web.archive.org/web/20080514111646/http://developer.apple.com/technotes/tn/tn2004.html">
       "TN2004: Debugging Open Firmware Using Telnet"</a></li>
 
-    <li><a href="http://developer.apple.com/technotes/tn/tn2023.html">
+    <li><a href="http://web.archive.org/web/20080509173539/http://developer.apple.com/technotes/tn/tn2023.html">
       "TN2023: Open Firmware Ethernet Debugging II - Telnet Downloading"
       </a></li>
 
-    <li><a href="http://developer.apple.com/technotes/tn/tn2001.html">
+    <li><a href="http://developer.apple.com/legacy/mac/library/#technotes/tn/tn2001.html">
       "TN2001: Running Files from a Hard Drive in Open Firmware"</a></li>
     
     <li><a href="http://sourceware.org/psim/">psim</a> - A PowerPC