If you enter a single logical escape symbol (") as the last character
on a line, or on a line by itself, it is ignored. When you enter logical escape
logical editing characters, the
For example, the lines: ABC""IDDEF both result in the line:
ABCDEF
characters in conjunction
results may be difficult
with other
to predict.
The logical line editing symbols are defined for each virtual machine
during VM/370 system generation. If your terminal's keyboard lacks any
of these special characters, your installation can define other special
characters for logical line editing. You can find out what logical line
editing symbols are in effect for your virtual machine by entering the
command:
cp query terminal
The response might be something like:
LINEND t , LINEDEL ¢ , CHARDEL , ESCAPE "
LINESIZE 130, MASK OFF, APL OFF, ATTN OFF, MODE VM You can use the CP TERMINAL command to
editing characters for your virtual machine.
cp terminal linend /
Then, the line:
input # line / input / t would be interpreted:
input # line
input # change the logical line
For example, if you enter:
The terminal characteristics listed in the response to the CP QUERY TERMINAL command are all controlled by operands of the CP TERMINAL
command. HOW VM/370 RESPONDS TO YOUR COMMANDS CP and CMS respond differently to different types of requests. All CMS command responses (and all responses to CP commands that are entered
from the CMS environment) are followed by the CMS ready message. The
form of the ready message can vary, since it can be changed using the SET commande The long form of the ready message is:
R; T=7.36/19.89 09:26:11
8 IBM VM/370 CMS User's Guide

Pg. of GC20-1819-2 Rev March 30, 1979 by Supp. SD23-9024-1 for 5748-X18 If you have issued the command:
set rdymsg sllsg the ready message looks like:
R; When you enter a command line incorrectly, you receive an error message, describing the error. The ready message contains a return code
from the command; for example:
R (00028) ;
indicates that the return code from the command was 28.
If you enter a CP or CMS command that requests information about your
virtual machine, the response should be the information requested. For
example, if you issue the command:
cp display g CP responds by showing you the contents of your virtual macbine=s general registers, for example: GPR 0 = 00000003 00003340 000007AO 00000003 GPR 4 = 00000848 C4404040 00000040 00002DFO GPR 8 = 00000008 000132F8 00002BA 0 00002230 GPR 12 = 00003238 FFFFFFFD 50013386 00000000 Sillilarly, if you issue the CMS command:
list file * assemble c
you might receive the following information: JUNK MYPROG ASSEMBLE C1 ASSEMBLE Ci
If you enter a CP command to alter your virtual machine configuraticn
or the status of your spool files, CP responds by telling you that the
task is accomplished. The response to:
cp purge reader all
might be: 0004 PURGED SOlie CP cOllllands, those that alter some of the characteristics of
your virtual machine, give you no response at all. If you enter:
cp spool e class x hold
you receive no response from CP. Certain CMS commands lIay issue prompting messages, to request you to
enter more information. The SORT command, which sorts CMS disk files,
is an example. If you enter:
sort in file a1 out file a1
Section 1. What it Means to Have a CMS Virtual Machine 9