Envoy Application Programming Manual
Table Of Contents
- What’s New in This Manual
- About This Manual
- 1 Application Programming With Envoy
- 7 ADM-2 Multipoint Supervisor Protocol
- 8 TINET Multipoint Supervisor Protocol
- 9 Burroughs Point-To-Point Protocol
- 10 Asynchronous Line Supervisor Protocol
- A ASCII Character Set
- B ASCII to EBCDIC Code Conversion
- C File-System Procedures
- D Statistics Messages
- E S-Series Changes to Envoy
- NonStop™ Himalaya S-Series Server Architecture
- G-Series Migration Considerations
- CBSENSEON and CFSENSEON Modifiers
- LEOTRESYN and NOLEOTRESYN Modifiers
- Treatment of Characters After the Termination Character
- Number of SYN Characters
- DTR Drop
- Reporting of Parity Error
- Half-Duplex Support for Asynchronous Lines
- Controller Replacement
- SYSGEN and COUP
- Unit Numbers
- FDX Line Changes
- No Support for Auto-Call Unit
- Glossary
- Index
Software Concepts
Envoy Application Programming Manual—427159-001
2-5
File-System Procedures
CONTROL
DEFINELIST
DEVICEINFO
FILEINFO
HALTPOLL
OPEN
READ[X]
SETMODE
SETMODENOWAIT
WRITE[X]
WRITEREAD[X]
For further information on how these file-system procedures can be used with Envoy, see
Appendix C, File-System Procedures
.
The most frequently used procedures are summarized here:
CHANGELIST
For a multipoint supervisor station, CHANGELIST enables or disables the polling
of a particular station. For a multipoint tributary station, CHANGELIST switches
the particular station to an active or inactive state.
CLOSE
Terminates access to a communications line or to an automatic calling unit.
CONTROL
Performs a variety of line control operations such as setting data terminal ready
(DTR), sending an EOT character, disconnecting the line, signaling a temporary text
delay, and so on.
DEFINELIST
For a multipoint supervisor station, DEFINELIST designates the polling and
selection addresses of each tributary station in the network. For a multipoint
tributary station, DEFINELIST designates the polling and selection addresses to
which the station responds.
HALTPOLL
For a multipoint supervisor station, HALTPOLL halts continuous polling that was
started by a nowait READ call. To restart the nowait READ, the READ procedure
must be called again.
OPEN
Provides access to a data communications line or to an automatic calling unit.