Pg. of GC20-1819-2 Rev March 30, 1979 by Supp. SD23-9024-1 for 5748-118 An easier way to enter the CP environment is ty pressing the Pll key. Whenever you press this key, your virtual machine is placed in a CP BEID status, and you can enter any CP command. From the CP environment, you must use the CP command BEGIN to resume execution of your virtual machine. HALTING SCREEN DISPLAYS When your terminal is displaying successive screens of output froa a
program or a CMS command, you can use the HT or HI I.aediate commands to
halt the display or the execution of the command, respectively. If your
terminal is writing the information a very rapid rate, you may have
difficulty entering the HT or HX command. In these circumstances, you
can use the PAl key --REQ key on a 3278 Bodel 21 -- or press the Enter
key twice to force your terminal to a CP READ status. Then, you can use
the CP command ATTN or REQUEST to signal a virtual machine When the screen status area indicates VM READ, you can enter HX or HT.
Using the eMS Editor with a 3270 The CMS editor has a special format and operation, called display mode, that makes editing CMS disk files with a 3270 aore convenient than on a
typewriter terminal. It uses most of the display screen, and, depending
on the terminal type and model, displays, depending upon the terminal type end model, up to 38 lines of a file at once. In addition to
displaying data lines of the file, the editor also indicates, on the
topaost line of the screen, the filename, filetJpe, record foraat, and
logical record length of the file being edited, as well as showing your
current mode: input or edit. The format of the screen is shown in
Figure 29.
The screen lines that you are most concerned with while editing are
the current line, the user input area (the bottom two lines), and the
editor's message line (the second line from the top) in which the
editor's responses and error messages are displayed. The current line
and the editor's message line are highlighted. When you first invoke the editor to edit a file, whatever is
currently on the screen (including your EDIT com.and line) is erased and
the full screen is controlled by the editor. The current line pointer
is positioned at the top of the file, the top part of the display screen
appears blank. The editor displays the characters "TOF:" and "EOP:" to
indicate the top and end of the file, respectively. ENTERING EDIT SUBCOMMANDS When you enter an EDIT subcommand into the user input area and press the
Enter key the subcommand is not displayed on the screen, but the change
(or line pointer movement) is reflected in the screen display. If you
enter a subcommand that moves the current line pointer, all of the lines
on the screen are shifted up or down, according to the action taken by
the subcommand.
If you use the INPUT subcomaand to enter input lines, the edit status
field indicates INPUT; all of the lines that you enter are placed in the
file and appear on the screen as the current line. (Entering input
lines from a remote 3270 is somewhat different. The following "Editing
on a Remote 3270" discusses the differences.)
344 IBM VM/370 CMS User's Guide

March 30, 1979
EDIT 1 DISPLAY SCREEN A12 F 80 3 »»> 1 80. TOF: 5 THIS IS THE FIRST LINE OF THE FILE. (CURRENT LINE). 6 THIS IS THE SECOND LINE OF THE FILE. THIS IS THE THIRD LINE OF THE FILE. EOF: Botes: VB READ ---I-idit session status. This indicates EDIT, INPUT, or NEW FILE.
The NEW FILE .essage appears when you edit a new file; it is
replaced with INPUT when you enter input mode and thereafter is
EDIT or INPUT. 2 The filename, filetype, and filemode of the file. 3 Record format and logical record length. • Editor reponse area; The response shown may be the response to
a VERIFY subcommand entered with no operands. 5 The symbols TOF: and EOP: indicate top of file and end of file, respectively.
6 The current line is located in the approximate center of the
output area of the screen. igure 29. How the CMS Editor Formats a 3270 Screen 1 c If you enter an invalid EDIT subcommand, or if you enter a subcommand that requests inforaation, the edit response appears in the message field of the screen. For example, if you enter:
trunc
the editor responds by displaying the current truncation setting, which aight be:
»»> 81
If you enter:
copyfile ayfile edit (trunc
the editor would respond:
»»> ?EDIT: copyfile myfile edit (trunc
to indicate that it does not recognize the entered line (COPYFILE is not
an EDIT subcommand). When you use line-number editing, the prompting message appears in this area; after you enter text in the user input
area, the text line is written in the output display area, at the
current line position.
Appendix C: Considerations for 3270 Display Terminal Users 345