The interrupt tree model is fully described in the
 document "Open Firmware Recommended Practice: Interrupt
 Mapping Version 0.9".  The document is available at:
-<http://playground.sun.com/1275/practice>.
+<http://www.openfirmware.org/ofwg/practice/>
 
 1) interrupts property
 ----------------------
 
        select SUNGEM_PHY
        ---help---
          Support for the Sun GEM chip, aka Sun GigabitEthernet/P 2.0.  See also
-         <http://www.sun.com/products-n-solutions/hardware/docs/pdf/806-3985-10.pdf>.
+         <http://docs.oracle.com/cd/E19455-01/806-3985-10/806-3985-10.pdf>.
 
 config CASSINI
        tristate "Sun Cassini support"
        select CRC32
        ---help---
          Support for the Sun Cassini chip, aka Sun GigaSwift Ethernet. See also
-         <http://www.sun.com/products-n-solutions/hardware/docs/pdf/817-4341-10.pdf>
+         <http://docs.oracle.com/cd/E19113-01/giga.ether.pci/817-4341-10/817-4341-10.pdf>.
 
 config SUNVNET
        tristate "Sun Virtual Network support"
 
  *
  * Specifications are available in:
  *
- * - Sun microsystems: Linker and Libraries.
- *   Part No: 817-1984-17, September 2008.
- *   URL: http://docs.sun.com/app/docs/doc/817-1984
+ * - Oracle: Linker and Libraries.
+ *   Part No: 817–1984–19, August 2011.
+ *   http://docs.oracle.com/cd/E18752_01/pdf/817-1984.pdf
  *
  * - System V ABI AMD64 Architecture Processor Supplement
- *   Draft Version 0.99.,
- *   May 11, 2009.
- *   URL: http://www.x86-64.org/
+ *   Draft Version 0.99.4,
+ *   January 13, 2010.
+ *   http://www.cs.washington.edu/education/courses/cse351/12wi/supp-docs/abi.pdf
  */
 #define PN_XNUM 0xffff
 
 
          You will still be able to do traditional IPv4 networking as well.
 
          For general information about IPv6, see
-         <http://playground.sun.com/pub/ipng/html/ipng-main.html>.
+         <https://en.wikipedia.org/wiki/IPv6>.
          For Linux IPv6 development information, see <http://www.linux-ipv6.org>.
          For specific information about IPv6 under Linux, read the HOWTO at
          <http://www.bieringer.de/linux/IPv6/>.