Retro1.org codex

SET                                         CMS Transient command or CP command

Use the SET command to establish, turn off, or reset a particular function in
your virtual machine.  There are two QUERY commands:  a CMS command, and a CP
command.  If you issue the CMS SET commands, all of the CP SET commands are
valid as well.

For more information on the CMS SET command, type HELP CMSSET.
For more information on the CP SET command, type HELP CPSET.