TACL Reference Manual

UTILS:TACL Commands and Functions
HP NonStop TACL Reference Manual—429513-018
8-265
XBUSDOWN/YBUSDOWN Command (Super-Group
Only)
XBUSDOWN/YBUSDOWN Command (Super-Group Only)
Use the XBUSDOWN or YBUSDOWN command to inform the operating system that
an interprocessor bus is being brought down and should not be used. This command is
equivalent to the BUSCMD process. The system reports the results of an XBUSDOWN
or YBUSDOWN command at the operator console. To use the XBUSDOWN or
YBUSDOWN command, you must have a group ID of 255.
X | Y
specifies the bus (X or Y) to be brought down.
from-cpu and to-cpu
are CPU numbers in the range from 0 through 15. Each CPU number specifies one
endpoint of a segment of the designated bus. On this segment, transfers are not
permitted. Specify -1 to indicate all processors.
Example
In a four-processor system, a super-group user can bring down the X bus from
processor 1 to all other processors by entering:
13> XBUSDOWN 1, -1
THE X BUS FROM CPU 01 TO 00 HAS BEEN DOWNED.
THE X BUS FROM CPU 01 TO 01 HAS BEEN DOWNED.
THE X BUS FROM CPU 01 TO 02 HAS BEEN DOWNED.
THE X BUS FROM CPU 01 TO 03 HAS BEEN DOWNED.
{ X | Y }BUSDOWN from-cpu , to-cpu