Exchange/SNA Manual

5 Exchange/SNA System

Procedure Calls

104700 Tandem Computers Incorporated 5–1

This section describes the system procedure calls that an application program can use

to communicate with the Exchange/SNA line server. Not all procedures that can be

used are included; only those procedures that are most commonly used and have

considerations specific to their use with Exchange/SNA are described here. These

descriptions focus on how the procedures are used with Exchange/SNA. For

examples of how the procedures are used with Exchange/SNA, see Appendix E. For a

complete, general description of every system procedure, see the Guardian Procedure

Calls Reference Manual.

Only 16-bit I/O procedures are described here. However, all remarks also apply to

extended 32-bit I/O operations. For information on the differences between 16-bit and

32-bit I/O operations, see the Guardian Procedure Calls Reference Manual.

The procedures are presented in alphabetic order for easy reference. The following

procedures are described:

AWAITIO

CANCEL

CANCELREQ

CONTROL

FILEINFO

OPEN

READ

SETMODE

WRITE

WRITEREAD