BOOT_X68K(8)  OpenBSD System Manager's Manual (X68K Architecture) BOOT_X68K(8)

NAME
     boot - system bootstrapping procedures



DESCRIPTION
     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.

     Cold starts. The X68000/X68030 system boots from the device which is de-
     termined by the configuration of battery-backuped SRAM.  By default, the
     boot rom attempt to boot from floppy disk drive (from 0 to 3) first, and
     then attempt to boot from hard disk (SASI or SCSI).  On the OpenBSD/X68k,
     booting from partition A of SCSI disks (sd?a) and 2HD floppy disks (fd?a,
     fd?c) is currently supported.

     First, the initial program loader of IOCS ROM or SCSI disk (or equiva-
     lent) reads boot program at the top of the disk, and then the boot pro-
     gram loads the OpenBSD kernel /bsd which is in the same partition of the
     disk.  If you press [SHIFT] key when booting, the boot program enables
     you to change boot flag RB_SINGLE with the [SHIFT] key, and to choose
     which kernel to be used with arrow keys.  If the LED of [HIRAGANA] key is
     turned on, the boot program adds RB_KDB flag and tries to boot the system
     in debug mode; see ddb(8) for details.

     Note for X68030+MC68030 systems: Nothing special to be attended to; you
     can boot OpenBSD just like as other operating systems such as Human68k
     and OS-9.

     Note for X68030/040turbo(68040 accelerator by BEEPs) systems: OpenBSD can
     boot under 040 mode.  It can also boot under 030 mode if you have MC68030
     on the board.

     Note for X68000/Xellent30(68030 accelerator by TSR)+MC68030 systems: In
     order to boot OpenBSD, you must choose 030 mode by using CH30.SYS, which
     must reside in the battery-backuped SRAM.

     Note for X68000/Jupiter-X(68040/060 accelerator by FTZ-net) systems: The
     system must be in 040/060 processor mode.

FILES
     /bsd                system code
     /usr/mdec/xxboot    boot program, xx is disk type

SEE ALSO
     reboot(2),  disklabel(8),  halt(8),  reboot(8),  shutdown(8)

OpenBSD 2.3                      Jun 16, 1996                                1