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z/OS User Exits › z/OS Blockmode User Exits—TSO › TIRDEVT—Device Characteristics Exit › Arguments

Arguments

Five pointer parameters are passed when this routine is called. The parameters for TSO are defined in the following table.

Name

I/O

Description

Parm 1

Input/output

emulated IO-PCB

Parm 2

Input/output

emulated ALT-IO-PCB

Parm 3

Input/output

Return characteristic

Parm 4

Input/output

TMOHDLCT (dialect)

Parm 5

Input/output

GLOBDATA

TMOHDLCT is a pointer to the eight-character dialect name as returned from the User Dialect exit, TIRDLCTX. This value represents the current selected dialect. The default exit returns a default dialect value for this parameter.

The RETURN CHARACTERISTIC is a pointer to a 256-byte structure defined by CA Gen for return of the device capabilities