March 30, 1979
vi IBM VM/370: eMS User's Guide

Pg. of GC20-1819-2 Rev March 30, 1979 by SUppa SD23-9024-1 for 5748-XX8 Contents
The entries in this Table of Contents are accumulative and reflect the addition of the VM/370 Basic System Extensions Program Product, Program Number 5748-XX8. summary of Amendments. • • • xiii PART 1. UNDERSTANDING CMS ••• • .1 SECTION 1. WHAT IT MEANS TO HAVE A CMS VIRTUAL MACHINE • • • • • • • • .3
How you Communicate with VM/370. • • .3
Getting Commands Into the System •• 5
Loading CMS in the Virtual Machine: The IPL Command •••••••••••••• 6
Logical Line Editing Symbols ••••••• 6
How VM/370 Responds to Your Commands •• 8
Getting Acquainted With CMS ••••••• 10 Virtual Disks and How They Are Defined • 11
Permanent Virtual Disks. • • 11
Defining Temporary Virtual Disks ••• 12
Formatting Virtual Disks • • • • • • • 12
Sharing Virtual Disks: Linking ••••• 13
Identifying Your Disk To Accessing. 14
Releasing Virtual Disks •••••••• 14
Releasing virtual Disks (2148=!!.§) • 14.1 SECTION 2. VM/370 ENVIRONMENTS AND MODE SWITCHING • • • • • • • • • • • • • • • 17
The CP Environment • • • • • • • • 17
The CMS Environment. • • • • • • 18
EDIT, INPUT, and CMS Subset. • • 19 DEBUG. • • • • • • • • • • • • 20 CMS/DOS. • • • • • • • • • • • 21
Interrupting Program Execution • 21 Virtual Machine Interruptions. • • 22
Control program Interruptions. • 23
Address Stops and Breakpoints. • • 23 SECTION 3. WHAT YOU CAN DO WITH VMj370-CMS COMMANDS • • • • • Command Defaults •••••• Commands to Control Terminal Communications •••••••• • 25 • 25 • 25
Establishing and Terminating
Communications with VM/370. • • • • • 25
Controlling Terminal Output. • • 26 Commands to Control How VM/370 Processes Input Lines • • • • Commands to Control How VM/370 • 28
Processes Input Lines (5748-XX8) •• 28.1 Controlling Keyboard-dependent-­ Communications. • • • • • • • • • • • 30 Commands to Create, Modify, and Move • 31 • • 31
Data Files and Programs • • • • • Commands that Create Files •••• Commands that Modify Disk Files.
Commands to Move Files • • • • • Commands to Print and Punch Files •• • 33 • 33 • 34 Co •• ands to Develop and Test OS and CMS Programs. • • • • • • • • • • 35
Commands to Develop and Test DOS Programs. • • • • • • • • • • 36
Commands Used in Debugging Programs. _ _ 37 Commands to Request • • • • 38 Commands to Request Information About
Terminal Characteristics. • _ _ • • • 38 Commands to Request Information About
Data Files •••••••••• _ ••• 39 Commands to Request Information About Your Virtual Disks. • • • • _ • • • • 40 Commands to Request Information About Your Virtual Machine. • • • • • • 40 SECTION 4. THE CMS FILE SYSTEM • 43 CMS File Formats • • • • • • • • _ • • • 43
How CMS Files Get Their Na.es. 43
How eMS Files Get Their Names (.21!!.§=11!D. • • '. .• • • • • • 44
Duplicating Filenames and Filetypes. • 44 What Are Reserved FiletYFes? • • _ 45
Filetypes for CMS Commands • • • 46 Output Files: TEXT and LISTING • 48
Filetypes for Temporary Files. • • • _ 50 Filetypes for Documentation. • • • 50 Filemode Letters and Numbers • • 51 When to specify Filemode Letters:
Reading Files • • • • • • • • • • • 52 When to Specify Filemode Letters: Writing Files • • • • • 54
Bow Filemode Numbers are Used. • 54
Managing Your CMS Disks. • • • • _ 56 CMS File Directories • • • • • • • 56 CMS Command Search Order • • • • • 57 SECTION 5. THE eMS EDITOR. 61
The EDIT Command • • • • • • ••• 61 Writing a File Onto Disk • 62
EDIT Subcommands • • • • • 63
The Current Line Pointer • • • 65
Verification and Search Columns. 68
Changing, Deleting, and Adding Lines •• 69
Describing Data File Characteristics •• 73
Record Length. • • • • • • • •• 73
Record Format. • • • • • • • • • 75 Using Special Characters • • 76
Setting Truncation Limits. • • 78
Entering a Continuation Character in Column 72 • • • • • • 79
Serializing Records. • • 80 Line-Number Editing. • • • • • 81
Renumbering Lines. • • 82
Controlling the Editor • • • • • • • • • 84
Communicating with CMS and CP. • • 84 Changing File Identifiers. • 85 Controlling the Editor's Displays ••• 86
preserving and Restoring Editor
Settings. • • • • • • • ••• _ • 86
preserving and Restoring Editor
Settings (.21!!8-1X8) ••••• ; ••• 86.1 X, Y, =, ? Subcommands •••• • 87
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