CPU(1prom)          RISC/os Reference Manual           CPU(1prom)



NAME
     cpu - turn CPUs on and off

SYNOPSIS
     cpu cpu_number on|off

AVAILABILITY
     This command is available only on RC6380 systems.

DESCRIPTION
     cpu is a PROM monitor or standalone shell (sash(1M)) command
     that allows you to enable and disable CPUs on multiprocessor
     computers. Use cpu_number to specify the desired CPU. Turn a
     CPU on with the on option and off with the off option.

EXAMPLES
     Example 1: Enable CPU 1 by entering the following command:

          cpu 1 on

     This command enables CPU 1 at the next reset or power on.
     The cpu command does not attempt to enable a CPU that is not
     physically present or is already on.

     Example 2: Disable CPU 1 by entering the following command:

          cpu 1 off

     This command stops the clock of the selected CPU (a reset or
     power on is not necessary). The cpu command does not attempt
     to disable a master CPU, one that is not physically present,
     or one that is already turned off. Use cpu 1 on to re-enable
     the CPU.

SEE ALSO
     prom(1prom), sash(1m)
















                        Printed 11/19/92                   Page 1