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+<!-- original version: 11648 untranslated -->
+
+
+  <sect2 arch="sparc" id="invoking-openboot"><title>Invoking OpenBoot</title>
+
+<para>
+
+OpenBoot provides the basic functions needed to boot the &arch-title;
+architecture.  This is rather similar in function to the BIOS in the
+x86 architecture, although much nicer.  The Sun boot PROMs have a
+built-in forth interpreter which lets you do quite a number of things
+with your machine, such as diagnostics, simple scripts, etc.
+
+</para><para>
+
+To get to the boot prompt you need to hold down the
+<keycap>Stop</keycap> key (on older type 4 keyboards, use the
+<keycap>L1</keycap> key, if you have a PC keyboard adapter, use
+the <keycap>Break</keycap> key) and press the
+<keycap>A</keycap> key. The boot PROM will give you a prompt,
+either <userinput>ok</userinput> or <userinput>&gt;</userinput>. It is
+preferred to have the <userinput>ok</userinput> prompt. So if you get
+the old style prompt, hit the <keycap>n</keycap> key to get the new
+style prompt. 
+
+</para>
+  </sect2>
+
+  <sect2 arch="sparc" id="boot-dev-select-sun">
+  <title>Boot Device Selection</title>
+
+<para>
+
+You can use OpenBoot to boot from specific devices, and also to change
+your default boot device.  However, you need to know some details
+about how OpenBoot names devices; it's much different from Linux
+device naming, described in <xref linkend="device-names"/>.
+Also, the command will vary a bit, depending on what version of
+OpenBoot you have.  More information about OpenBoot can be found in
+the <ulink url="&url-openboot;">Sun OpenBoot Reference</ulink>.
+
+</para><para>
+
+Typically, with newer revisions, you can use OpenBoot device such as
+``floppy'', ``cdrom'', ``net'', ``disk'', or ``disk2''.  These have
+the obvious meanings; the ``net'' device is for booting from the
+network.  Additionally, the device name can specify a particular
+partition of a disk, such as ``disk2:a'' to boot disk2, first
+partition.  Full OpenBoot device names have the form
+
+<informalexample>
+<screen>
+<replaceable>driver-name</replaceable>@
+<replaceable>unit-address</replaceable>:
+<replaceable>device-arguments</replaceable>
+</screen></informalexample>.
+
+In older revisions of OpenBoot, device naming is a bit different: the
+floppy device is called ``/fd'', and SCSI disk devices are of the form
+``sd(<replaceable>controller</replaceable>,
+<replaceable>disk-target-id</replaceable>,
+<replaceable>disk-lun</replaceable>)''.  The command
+<userinput>show-devs</userinput> in newer OpenBoot revisions is useful
+for viewing the currently configured devices.  For full information,
+whatever your revision, see the 
+<ulink url="&url-openboot;">Sun OpenBoot Reference</ulink>.
+
+</para><para>
+
+To boot from a specific device, use the command <userinput>boot
+<replaceable>device</replaceable></userinput>.  You can set this
+behavior as the default using the <userinput>setenv</userinput>
+command.  However, the name of the variable to set changed between
+OpenBoot revisions.  In OpenBoot 1.x, use the command
+<userinput>setenv boot-from
+<replaceable>device</replaceable></userinput>.  In later revisions of
+OpenBoot, use the command <userinput>setenv boot-device
+<replaceable>device</replaceable></userinput>. Note, this is also
+configurable using the <command>eeprom</command> command on Solaris,
+or modifying the appropriate files in
+<filename>/proc/openprom/options/</filename>, for example under Linux:
+
+<informalexample><screen>
+
+echo disk1:1 &gt;/proc/openprom/options/boot-device
+
+</screen></informalexample> 
+
+and under Solaris:
+
+<informalexample><screen>
+
+eeprom boot-device=disk1:1
+
+</screen></informalexample> 
+
+</para>
+  </sect2>