PowerOff tells the South Bridge of the X1000 (AMD SB600) to turn off the PSU.
It takes 4 seconds until the SB600 actually sends the signal to the PSU so
during that time it can be aborted with CTRL-C.

Because of the 4 second delay, either make sure you do not have any application
likely to be writing data to the harddisk or use 'Reboot FAST SYNC' to force any
cached/pending write to be committed to disk, e.g.:

 RUN >NIL: PowerOff
 Reboot FAST SYNC

or on a single line for FKey or as an Alias:

 Reboot FAST SYNC `RUN >NIL: PowerOff`


HISTORY:

V1.1 (13.01.2013) First public release
- Now it's possible to abort with CTRL-C

V1.0 (05.04.2012) X1000 betatesters release
- The shortest program I ever wrote :-)
- Thanks to Darren Stevens for figuring out which register to poke