Editing VM (operating system) (section)

== CP commands ==

As of release 6, the VM/370 Control Program has a number of commands for General Users, concerned with defining and controlling the user's virtual machine. Lower-case portions of the command are optional<ref>{{cite manual |title=IBM Virtual Machine Facility/370: CP Command Reference for General Users |date=August 1, 1979 |publisher=[[IBM]] |url=http://bitsavers.informatik.uni-stuttgart.de/pdf/ibm/370/VM/370/Release_6/GC20-1820-3_VM370_CP_Command_Reference_for_General_Users_Rel_6_PLC_4_Aug79.pdf |access-date=August 15, 2019 |archive-date=April 2, 2020 |archive-url=https://web.archive.org/web/20200402035145/http://bitsavers.org/pdf/ibm/370/VM_370/Release_6/GC20-1820-3_VM370_CP_Command_Reference_for_General_Users_Rel_6_PLC_4_Aug79.pdf |url-status=live }}</ref>

{| class="wikitable"
|-
! Command !! Description
|-
| #CP || Allows the user to issue a CP command from a command environment, or any other virtual machine after pressing the break key (defaults to PA1)
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| ADSTOP || Sets an ''address stop'' to halt the virtual machine at a specific instruction
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| ATTN || Causes an ''attention interruption'' allowing CP to take control in a command environment
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| Begin || Continue or resume execution of the user's virtual machine, optionally at a specified address
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| CHange|| Alter attributes of a spool file or files. For example, the output class or the name of the file can be changed, or printer-specific attributes set
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| Close|| Closes an open printer, punch, reader, or console file and releases it to the spooling system
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| COUPLE|| Connect a virtual [[channel-to-channel adapter]] (CTCA) to another. Also used to connect simulated QDIO Ethernet cards to a virtual switch.
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| CP || Execute a CP command in a CMS environment
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| DEFine|| Alter the current virtual machine configuration. Add virtual devices or change available storage size
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| DETach || Remove a virtual device or channel from the current configuration
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| DIAL || Connect your terminal at the logon screen to a logged-on multi-access virtual machine's simulated 3270 or typewriter terminals
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| DISConn|| Disconnect your terminal while allowing your virtual machine to continue running
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| Display || Display virtual machine storage or (virtual) hardware registers
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| DUMP || Print a snapshot dump of the current virtual machine on the virtual spooled printer
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| ECHO || Set the virtual machine to echo typed lines
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| EXTernal|| Cause an ''external interrupt'' to the virtual machine
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| INDicate || Display current system load or your resource usage
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| Ipl || IPL (boot) an operating system on your virtual machine
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| LINK || Attach a device from another virtual machine, if that machine's definition allows sharing
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| LOADVFCB || Specify a ''forms control buffer'' (FCB) for a virtual printer
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| LOGoff<br />LOGout || Terminate execution of the current virtual machine and disconnect from the system
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| Logon<br />Login || Sign on to the system
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| Message<br />MSG || Send a one-line message to the system operator or another user
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| NOTReady || Cause a virtual device to appear not ready
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| ORDer|| Reorder closed spool files by ID or class
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| PURge || Delete closed spool files for a device by class,m ID, or ALL
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| Query || Display status information for your virtual machine, or the message of the day, or number or names of logged-in users
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| READY || Cause a ''device end'' interruption for a device
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| REQuest || Cause an interrupt on your virtual console
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| RESET || Clear all pending interrupts for a device
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| REWind || Rewind a real (non virtual) [[magnetic tape]] unit
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| SET || Set various attributes for your virtual machine, including messaging or terminal [[function keys]]
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| SLeep || Place your virtual machine in a dormant state indefinitely or for a specified period of time
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| SMsg || Send a one-line special message to another virtual machine (usually used to control the operation of the virtual machine; commonly used with RSCS)
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| SPool|| Set options for a spooled virtual device (printer, reader, or punch)
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| STore || Alter the contents of registers or storage of your virtual machine
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| SYStem || Reset or restart your virtual machine or clear storage
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| TAg || Set a ''tag'' associated with a spooled device or file. The tag is usually used by VM's Remote Spooling Communications Subystem (RSCS) to identify the destination of a file
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| TERMinal || Set characteristics of your terminal
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| TRace || Start or stop tracing of specified virtual machine activities
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| TRANsfer|| Transfer a spool file to or from another user
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| VMDUMP || Dump your virtual machine in a format readable by the Interactive Problem Control System (IPCS) [[Software as a Product|program product]]
|}