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<sect2 arch="powerpc" id="boot-cd"><title>Booting from a CD-ROM</title>
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&boot-installer-intro-cd.xml;
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Currently, the only &arch-title; subarchitectures that support CD-ROM
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booting are PReP and New World PowerMacs. On PowerMacs, hold the
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<keycap>c</keycap> key, or else the combination of
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<keycap>Command</keycap>, <keycap>Option</keycap>,
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<keycap>Shift</keycap>, and <keycap>Delete</keycap>
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keys together while booting to boot from the CD-ROM.
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OldWorld PowerMacs will not boot a Debian CD, because OldWorld
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computers relied on a Mac OS ROM CD boot driver to be present on the CD,
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and a free-software version of this driver is not available. All
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OldWorld systems have floppy drives, so use the floppy drive to launch
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the installer, and then point the installer to the CD for the needed
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If your system doesn't boot directly from CD-ROM, you can still use
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the CD-ROM to install the system. On NewWorlds, you can also use an
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OpenFirmware command to boot from the CD-ROM manually. Follow the
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instructions in <xref linkend="boot-newworld"/> for booting from
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the hard disk, except use the path to <command>yaboot</command> on the
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CD at the OF prompt, such as
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<informalexample><screen>
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0 > boot cd:,\install\yaboot
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</screen></informalexample>
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<sect2 arch="powerpc" id="install-drive">
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<title>Booting from Hard Disk</title>
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&boot-installer-intro-hd.xml;
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<sect3><title>Booting CHRP from OpenFirmware</title>
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<emphasis>Not yet written.</emphasis>
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<sect3><title>Booting OldWorld PowerMacs from MacOS</title>
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If you set up BootX in <xref linkend="files-oldworld"/>, you can
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use it to boot into the installation system. Double click the
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<guiicon>BootX</guiicon> application icon. Click on the
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<guibutton>Options</guibutton> button and select <guilabel>Use
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Specified RAM Disk</guilabel>. This will give you the
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chance to select the <filename>ramdisk.image.gz</filename> file. You
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may need to select the <guilabel>No Video Driver</guilabel> checkbox,
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depending on your hardware. Then click the
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<guibutton>Linux</guibutton> button to shut down MacOS and launch the
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<sect3 id="boot-newworld">
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<title>Booting NewWorld Macs from OpenFirmware</title>
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You will have already placed the <filename>vmlinux</filename>,
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<filename>initrd.gz</filename>, <filename>yaboot</filename>, and
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<filename>yaboot.conf</filename> files at the root level of your HFS
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partition in <xref linkend="files-newworld"/>.
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Restart the computer, and immediately (during the chime) hold down the
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<keycap>Option</keycap>, <keycap>Command (cloverleaf/Apple)</keycap>,
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<keycap>o</keycap>, and <keycap>f</keycap> keys all together. After
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a few seconds you will be presented with the Open Firmware prompt.
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<informalexample><screen>
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0 > boot hd:<replaceable>x</replaceable>,yaboot
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</screen></informalexample>
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replacing <replaceable>x</replaceable> with the partition number of
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the HFS partition where the
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kernel and yaboot files were placed, followed by a &enterkey;. On some
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machines, you may need to use <userinput>ide0:</userinput> instead of
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<userinput>hd:</userinput>. In a few more seconds you will see a
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<informalexample><screen>
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</screen></informalexample>
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At yaboot's <prompt>boot:</prompt> prompt, type either
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<userinput>install</userinput> or <userinput>install video=ofonly</userinput>
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followed by a &enterkey;. The
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<userinput>video=ofonly</userinput> argument is for maximum
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compatibility; you can try it if <userinput>install</userinput>
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doesn't work. The Debian installation program should start.
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<sect2 arch="powerpc" id="usb-boot">
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<title>Booting from USB memory stick</title>
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Currently, NewWorld PowerMac systems are known to support USB booting.
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Make sure you have prepared everything from <xref
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linkend="boot-usb-files"/>. To boot a Macintosh system from a USB stick,
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you will need to use the Open Firmware prompt, since Open Firmware does
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not search USB storage devices by default.
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<!-- TODO: although it could be made to; watch this space -->
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To get to the prompt, hold down
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<keycombo><keycap>Command</keycap> <keycap>Option</keycap>
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<keycap>o</keycap> <keycap>f</keycap></keycombo> all together while
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booting (see <xref linkend="invoking-openfirmware"/>).
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You will need to work out where the USB storage device appears in the
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device tree, since at the moment <command>ofpath</command> cannot work
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that out automatically. Type <userinput>dev / ls</userinput> and
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<userinput>devalias</userinput> at the Open Firmware prompt to get a
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list of all known devices and device aliases. On the author's system
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with various types of USB stick, paths such as
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<filename>usb0/disk</filename>, <filename>usb0/hub/disk</filename>,
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<filename>/pci@f2000000/usb@1b,1/disk@1</filename>, and
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<filename>/pci@f2000000/usb@1b,1/hub@1/disk@1</filename> work.
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Having worked out the device path, use a command like this to boot the
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<informalexample><screen>
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boot <replaceable>usb0/disk</replaceable>:<replaceable>2</replaceable>,\\:tbxi
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</screen></informalexample>
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The <replaceable>2</replaceable> matches the Apple_HFS or
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Apple_Bootstrap partition onto which you copied the boot image earlier,
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and the <userinput>,\\:tbxi</userinput> part instructs Open Firmware to
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boot from the file with an HFS file type of "tbxi" (i.e.
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<command>yaboot</command>) in the directory previously blessed with
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<command>hattrib -b</command>.
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The system should now boot up, and you should be presented with the
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<prompt>boot:</prompt> prompt. Here you can enter optional boot
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arguments, or just hit &enterkey;.
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</para><warning><para>
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This boot method is new, and may be difficult to get to work on some
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NewWorld systems. If you have problems, please file an installation
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report, as explained in <xref linkend="submit-bug"/>.
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<sect2 arch="powerpc" id="boot-tftp"><title>Booting with TFTP</title>
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&boot-installer-intro-net.xml;
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Currently, PReP and New World PowerMac systems support netbooting.
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On machines with Open Firmware, such as NewWorld Power Macs, enter the
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boot monitor (see <xref linkend="invoking-openfirmware"/>) and
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use the command <command>boot enet:0</command>. PReP and CHRP boxes
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may have different ways of addressing the network. On a PReP machine,
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<userinput>boot <replaceable>server_ipaddr</replaceable>,<replaceable>file</replaceable>,<replaceable>client_ipaddr</replaceable></userinput>.
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<sect2 arch="powerpc">
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<title>Booting from Floppies</title>
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Booting from floppies is supported for &arch-title;, although it is
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generally only applicable for OldWorld systems. NewWorld systems are
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not equipped with floppy drives, and attached USB floppy drives are
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not supported for booting.
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You will have already downloaded the floppy images you needed and
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created floppies from the images in <xref linkend="create-floppy"/>.
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To boot from the <filename>boot-floppy-hfs.img</filename> floppy,
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place it in floppy drive after shutting the system down, and before
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pressing the power-on button.
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For those not familiar with Macintosh
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floppy operations: a floppy placed in the machine prior to boot will
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be the first priority for the system to boot from. A floppy without a
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valid boot system will be ejected, and the machine will then check for
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bootable hard disk partitions.
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After booting, the <filename>root.bin</filename> floppy is
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requested. Insert the root floppy and press &enterkey;. The installer
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program is automatically launched after the root system has been
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<sect2 arch="powerpc"><title>PowerPC Boot Parameters</title>
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Many older Apple monitors used a 640x480 67Hz mode. If your video
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appears skewed on an older Apple monitor, try appending the boot
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argument <userinput>video=atyfb:vmode:6</userinput> , which will
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select that mode for most Mach64 and Rage video hardware. For Rage 128
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hardware, this changes to
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<userinput>video=aty128fb:vmode:6</userinput> .