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 determined 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 equivalent) reads boot program at the top of the disk, and then the boot program 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)