2. Use your terminal's Attention key (or equivalent). On a 2741
terminal, you must normally press the Attention key twice, quickly,
to enter theCP environment.
The following message indicates that your virtual machine is in theCP environment: CP After entering whatever CP commands you
virtual machine to the environment or mode
theCP command:
cp begin
need to use, you return your
that it came fromby using
which, literally, begins execution of your virtual machine.
TheeMS Environment You enter the CMS environment from CP by issuing the IPL command, which
loadsCMS into your virtual storage area. If you are planning to use CMS for your entire terminal session,· you should not have to IPL again
unless a program failure forces you into theCP environment. When you issue the IPL command, you can specify either the named
systemCMS at your installation or you can load CMS by specifying the
virtual address of the disk on which theCMS system resides. For
example:
cp ipl cms
-- or --
cp ipl190 When your virtual machine is in the CMS environment, you can issue
anyCMS command and any of the CP commands that are valid for your user
privilege class.You can also execute many of your own as or DOS programs; the ways you can execute programs are discussed in "Section 8.
DevelopingOS Programs Under CMS" and "Section 9. Developing DOS programs Under CMS." You can enter CP commands from CMS in any of the following ways: • Using the implied CP function of CMS (See • With the CP command • with the tcp function For the most part, you may enter any CP command directly from
theCMS environment. This implied CP function is controlled by an
operand of theCMS SET command, IMPCP. You can determine whether the
impliedCP function is in effect for your virtual machine by entering
the command:
query impcp
If the response is:IMPCP = OFF you can change it by entering:
set impcp on
18IBM VM/370 CMS User's Guide
terminal, you must normally press the Attention key twice, quickly,
to enter the
The following message indicates that your virtual machine is in the
virtual machine to the environment or mode
the
cp begin
need to use, you return your
that it came from
which, literally, begins execution of your virtual machine.
The
loads
unless a program failure forces you into the
system
virtual address of the disk on which the
example:
cp ipl cms
-- or --
cp ipl
any
privilege class.
Developing
the
operand of the
implied
the command:
query impcp
If the response is:
set impcp on
18