127 lines
4.1 KiB
Plaintext
127 lines
4.1 KiB
Plaintext
$NetBSD: FBInstall,v 1.1.1.1 2002/05/09 20:03:57 jdolecek Exp $
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Note of FastBoot/AutoBoot Installation for !BtNetBSD V0.90
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based on !BtRiscBSD
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Updated by Reinoud Zandijk 18 Feb 2001
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Author: Mark Brinicombe 12th May 1995
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Updated: 20th June 1997
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Installation
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------------
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Two patches are required to the standard boot files
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The following lines should be added to the start of
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!Boot.Choices.Boot.PreDesktop
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----------------------- Cut here -----------------------
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|Start NetBSD !Boot FastBoot
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Run <Obey$Dir>.^.^.^.BtNetBSD.!BtNetBSD.!Boot
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Run <BtNetBSD$Dir>.TestBoot
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If "<NetBSD$FastBoot>" = "1" THEN Echo NetBSD FastBoot mode engaged
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If "<NetBSD$FastBoot>" = "2" THEN Echo NetBSD ConfBoot mode engaged
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If "<NetBSD$FastBoot>" = "3" THEN Echo NetBSD AutoBoot mode engaged
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If "<NetBSD$FastBoot>" = "4" THEN Echo NetBSD FastConf mode engaged
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|End
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----------------------- Cut here -----------------------
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These commands should be the first one run in the PreDesktop
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file. They boot the boot loader application (primarily to set
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BtNetBSD$Dir). The file <BtNetBSD$Dir>.TestBoot is then run
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to test for the ALT or CTRL keys are being held down. In addition
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it checks several CMOS RAM bits for boot configuration options.
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The following lines should be added to the start of
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!Boot.Choices.Boot.Desktop
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----------------------- Cut here -----------------------
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|Start NetBSD !Boot FastBoot
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Iconsprites <BtNetBSD$Dir>.!Sprites22
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If <NetBSD$FastBoot> = 4 THEN Run <BtNetBSD$Dir>.!Edit
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If <NetBSD$FastBoot> > 0 AND <NetBSD$FastBoot> < 4 THEN Obey <BtNetBSD$Dir>.fastboot
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|End
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----------------------- Cut here -----------------------
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This command should be the first one run in the Desktop file.
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It runs the NetBSD Bootloader with the configured parameters.
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There is a specific reason for not putting all the fastboot code in
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one file. The PreDesktop patch is run very early in the boot up so
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that the ALT and CTRL keys can be detected quickly. However, currently
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the actually bootloader cannot be run at this point unless a lot of
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memory is available in the module area (~1Meg) as currently the
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module area is used for temporary storage of the kernel being
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booted.
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This means that the actual boot is prosponed until the start of
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the Desktop file. At this point the desktop has been started and
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the task manager is running so it will be possible to allocate
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a large amount of module space.
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Activation
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----------
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Once installed, to engage the fastboot hold ALT down immediately
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after a reset. As soon as the "fastboot engaged" message is printed
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the ALT key can be released.
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To engage the fastconf mode hold CTRL down immediately
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after a reset. As soon as the "fastconf engaged" message is printed
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the CTRL key can be released.
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Configuration
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-------------
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Configuration is done via the !BtNetBSD application.
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When ever NetBSD is booted the commandline used to boot it is saved
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by the bootloader to the file <BtNetBSD$Dir>.FastBoot
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Rerunning this file will then boot NetBSD with the last parameters
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used. It is this file that the fastboot uses so the fast boot will
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boot NetBSD with the same parameters as were used for the last boot.
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ConfBoot mode
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-------------
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This mode is identified by NetBSD$FastBoot being set to 2. This indicates
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that the bootloader has been configured to always boot NetBSD. This is
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down by setting a bit in the CMOS RAM (via !BtNetBSD).
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If NetBSD boots are configured the action of the ALT is reversed so that
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holding down ALT will allow a RISC OS boot instead.
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AutoBoot mode
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-------------
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This mode is identified by NetBSD$FastBoot being set to 3. This indicates
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that an automatic boot was requested by NetBSD before it rebooted. This
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will happen when /sbin/reboot is used instead of /sbin/halt.
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FastBoot mode
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-------------
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This is the behaviour when ALT is held down at boot time and ConfBoot mode
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has not been configured. It just bypasses most of the normal startup and
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boots NetBSD.
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FastConf mode
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-------------
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This is the behaviour when CTRL is held down at boot time. This is similar to
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FastBoot mode except that the !BtNetBSD is provided to allow boot parameters
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to be changed.
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Bugs
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----
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Well hopefully there are no bugs :-)
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