r
EXECUTE
THE FILE AND RETURN CONTROL TO CMS. CMS EXEC SEARCH L
EXPAND THE
NAME TOTHE FULL REAL
NAME, EXECUTE IT, AND RETURN CONTROL TO CMS. r
EXECUTE
THE FILE AND RETURN CONTROL TO CMS. TRANSI ENT OR NUCLEUS RESIDENT COMMAND L
EXECUTE THE FILE AND
RETURN CONTROL TOCMS r
EXECUTE THE FILE AND
RETURN CONTROL TO CMS. CMS MODULE SEARCH L
EXPAND THE
NAME TO THE FULL
REAL NAME, EXECUTE IT, AND RETURN CONTROL TO CMS. F EXECUTE THE COMMAND CP AND RETURN SEARCH CONTROL TO CMS. Figure 2. How CMS Searches for the Command to Execute 8 IBM eMS command and Macro Reference

DOS PP EREP IPCS Op Ga. OS PP SCRIPT indicates that this command invokes a DJS Program Product, available from IBM for a license fee.
indicates that this command is described in the VK/310 OLTSEP lig£Q£Qing further details on the--operands used by this command are contained in the EnYi£QIlmental indicates that this command is a part of the Interactive Problem Control System (IPCS), and is invoked under CMS. It
is described in the Guide. indicates that this command is described in the indicates that this command invokes an )S Program Product, available from IBM for a license fee.
indicates that this command invokes a text
an IBM Installed User Program, available
license fee. processor that is
from IBM for a SPG indicates that this command is described in the SYSGEN indicates that this command is described in the Gene£atiQIl Note: If a CMS command is described in this manual, but is also repeated in-other VM/370 publications, the chart does not refer to those other
publications. You can enter CMS commands when you are running CMS in your virtual
machine, the terminal is idle, and the virtual machine is receptive for
input. However, if CMS is processing a previously entered command and
your typewriter terminal keyboard is locked, you must signal your
virtual machine via an attention interruption. The system acknowledges
the interruption by unlocking the keyboard. Now you can enter commands.
If your terminal is a display device, there is no problem of entering
commands while the virtual machine is busy as its keyboard remains
unlOCked for additional command input. Note that in these circumstances
the command you enter is stacked and is not executed until the command
that is currently being executed completes. If more commands are
entered than can be handled by CP, a NOT ACCEPTED is displayed
at the display terminal.
In addition to the commands listed in Figures 3 and q, there are
seven =ommands called Immediate commands which are handled in a
different manner from the others. They may be entered while another
command is being executed by pressing the Attention key (or its
equivalent), and they are executed immediately. The commands
are: • HB -Halt batch execution • H) - Halt tracing • HT -Halt typing • HX: - Halt execution • RO - Resume tracing • RT -Resume typing • SO - Suspend tracing Section 1. Introduction and General Concepts 9