BOOT_LUNA88K(8)	   OpenBSD System Manager's Manual (Luna88k)   BOOT_LUNA88K(8)

NAME
     boot_luna88k - luna88k system bootstrapping procedures

DESCRIPTION
   Boot process description
     When powered on, or after a system reboot, the luna88k ROM monitor will
     proceed to its initialization, and will boot the operating system
     configured in nvram if autoboot is enabled.

   DIP switches description
     The behaviour of the ROM monitor, as well as some kernel options, are
     controlled through the SW1 set of DIP switches on the front panel.

     The switch positions are not the same on Luna-88k and Luna-88k2 models.
     On Luna-88k, a switch is enabled when in the down position, while on the
     Luna-88k2, a switch is enabled when in the up position.

     The following switches alter the ROM monitor behaviour:

     Switch    Enabled			    Disabled

     1	       interact with ROM monitor    auto-boot
     2	       serial console		    graphics console

     The following switches alter the kernel behaviour:

     Switch    Enabled			    Disabled

     1	       boot in single-user mode	    boot in multi-user mode
     3	       prompt for root device	    do not prompt for root device
     4	       enter UKC mode		    do not enter UKC mode

     For more details about the ``User Kernel Configuration'' mode (UKC), see
     boot_config(8).

     Note that the first switch controls both the kernel and the ROM monitor
     behaviour.

   Abnormal system termination
     In case of system crashes, the kernel will usually enter the kernel
     debugger, ddb(4), unless it is not present in the kernel, or it is
     disabled via the ddb.panic sysctl.	 Upon leaving ddb, or if ddb was not
     entered, the kernel will halt the system if it was still in device
     configuration phase, or attempt a dump to the configured dump device, if
     possible.	The crash dump will then be recovered by savecore(8) during
     the next multi-user boot cycle.  It is also possible to force other
     behaviours from ddb.

FILES
     /bsd     default system kernel
     /bsd.rd  standalone installation kernel, suitable for disaster recovery

SEE ALSO
     ddb(4), boot_config(8), halt(8), init(8), reboot(8), savecore(8),
     shutdown(8)

CAVEATS
     There is currently no standalone bootloader program on the Luna88k.  The
     OpenBSD kernel is loaded directly from the ROM monitor.  Because of this,
     kernel symbols are not available.

OpenBSD 4.9			 May 31, 2007			   OpenBSD 4.9

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