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+.\" Copyright (c) 1990, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" the Systems Programming Group of the University of Utah Computer
+.\" Science Department.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)boot_hp300.8	8.2 (Berkeley) 4/19/94
+.\"
+.Dd April 19, 1994
+.Dt BOOT_HP300 8 hp300
+.Os
+.Sh NAME
+.Nm boot
+.Nd
+system bootstrapping procedures
+.Sh DESCRIPTION
+.Sy Power fail and crash recovery.
+Normally, the system will reboot itself at power-up or after crashes.
+An automatic consistency check of the file systems will be performed,
+and unless this fails, the system will resume multi-user operations.
+.Pp
+.Sy Cold starts.
+On an HP300, the boot procedure uses the boot ROM to load a boot program
+from an
+.Tn LIF
+format directory at the beginning of an attached disk.
+The
+.Pa /usr/mdec
+directory contains a disk boot programs which should be placed in a
+new pack automatically by
+.Xr newfs 8
+when the ``a'' partition file system on the pack is created.
+.Pp
+This
+.Em boot
+program
+finds the corresponding file on the given device 
+.Pf ( Ar vmunix
+by default),
+loads that file into memory,
+and starts the program at the entry address specified in the program header.
+.Pp
+The boot program can be interrupted by typing `^C' (ctrl-C).
+This will force the boot program to interactively prompt for a system to boot.
+If not interrupted, it will boot from the device from which the boot
+program itself was loaded.
+.Pp
+The file specifications used for an interactive boot are of the form:
+.Pp
+.Dl device(unit, minor)
+.Pp
+where
+.Ar device
+is the type of the device to be searched,
+.Ar unit
+is 8 * the hpib number plus the unit number of the disk or tape,
+and
+.Ar minor
+is the disk partition or tape file number.
+Normal line editing characters can be used when typing the file specification.
+Currently, ``rd'' and ``sd'' are the only valid
+.Ar device
+specifiers.
+.Pp
+For example,
+to boot from the `a' file system of unit 0 on HP-IB 2,
+type
+.Ql rd(16, 0)vmunix
+to the boot prompt.
+For tapes, the minor device number gives a file offset.
+.Pp
+In an emergency, the bootstrap methods described in the paper
+.%T Installing 4.3bsd on the HP300
+can be used to boot from a distribution tape.
+.Sh FILES
+.Bl -tag -width /usr/mdec/installboot -compact
+.It Pa /vmunix
+system code
+.It Pa /usr/mdec/bootrd
+.Tn LIF
+format boot block
+.It Pa /usr/mdec/installboot
+program to install boot blocks
+.El
+.Sh SEE ALSO
+.Xr halt 8 ,
+.Xr reboot 8 ,
+.Xr shutdown 8