NAME    [Toc]    [Back]

     boot_luna88k - luna88k system bootstrapping procedures

DESCRIPTION    [Toc]    [Back]

   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    [Toc]    [Back]
     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    [Toc]    [Back]
     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 multiuser
  boot  cycle.   It  is also possible to force other behaviours from ddb.

FILES    [Toc]    [Back]

     /bsd  default system kernel

SEE ALSO    [Toc]    [Back]

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

CAVEATS    [Toc]    [Back]

     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      3.6                          August     27,     2004