Communication (programs, users, system)

Macro	Brief description
BKPT	Transfers control to the system. The user may then enter commands at the data display terminal
CLCOM	Terminates intertask communication for the calling program (see "Intertask communication (ITC)")
CMD	Executes commands without leaving program mode
JINF	Transfers a list of job data
OPCOM	Opens intertask communication for the calling program and defines its ITC name (see "Intertask communication (ITC)")
RELBF	Deletes the first message in the ITC queue of the calling program (see "Intertask communication (ITC)")
REVNT	Receives a message for the ITC name of the calling program (see "Intertask communication (ITC)")
SEVNT	Sends a message to an ITC user (see "Intertask communication (ITC)")
STXIT	Specifies user routines for interrupt handling which are to be started if a program interrupt occurs. By means of the INFORM-PROGRAM command data can be transferred to an interrupt routine (see the “ Commands” manual [19 (Related publications)])
SWITCH	Switches and transfers the 32 job switches associated with the job or the 32 user switches associated with the user' s own or another user' s user ID
TMODE	Transfers job attributes such as characteristics of the data display terminal (type, buffer, mode, ...) as well as run priority, TSN, CPU time, and user ID
TYPIO	Outputs a message on the console and accepts a response
WROUT	Transfers a record to the SYSOUT system file, i.e. in interactive mode to the data display terminal. In batch mode, the system file SYSOUT is printed after job termination (see also CUPAB) unless the user has assigned it to a cataloged file
WRTRD	In interactive mode, transfers a message to the data display terminal and subsequently accepts a message from there (see also CUPAB)

The SWITCH macro replaces the GETSW, GETUS, SETSW and SETUS macros. These macros are still supported for reasons of compatibility only and are described in the appendix "GETSW - Get switch".