Data terminal communication

Macro	Brief description
CUPAB	Generates addressing aids (DSECTs) for the operand lists of the RDATA, WROUT and WRTRD macros
GCCSN	Displays the current code table for input and output of command and data (SYSDTA/SYSCMD/SYSOUT/SYSLST)
DCSTA	Generates an area (CSECT) or addressing aids (DSECTs) for the information supplied by the TSTAT macro
RDATA	Reads a record from the SYSDTA system file, i.e. from a cataloged file, an S variable, a PLAM library element or the interactive terminal (see also CUPAB)
SETBF	Changes the size of the system input/output buffer of the terminal
TCHNG	Determines whether screen overflow is controlled by the system or by the user program
TMODE	Supplies information on the calling task, e.g. buffer size, line length and logical terminal type
TSTAT	Supplies information on the features of the interactive terminal (see also DCSTA)
TYPIO	Outputs a message at the console and accepts a response from the operator
VTCSET	Defines logical control characters
VTSUCB	Generates VTSU parameters for input/output
WROUT	Writes a record to the SYSOUT system file, i.e. in interactive mode to the terminal, a cataloged file, an S variable or a PLAM library element. In batch mode the SYSOUT system file is printed after job termination (see also CUPAB), unless the user has assigned it to a cataloged file, an S variable or a PLAM library element
WRTRD	In interactive mode, writes a message to the terminal and subsequently accepts a message from there (see also CUPAB)