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
Envoy Application Programming Manual—427159-001
7-1
7
ADM-2 Multipoint Supervisor Protocol
The ADM-2 multipoint supervisor protocol enables an application process to act as the
supervisor station in a centralized multipoint network consisting of either of the
following terminals:
•
Lear-Siegler ADM-2 Interactive Display Terminals with the polling option installed
or
•
Burroughs terminals that can interface with the Burroughs Basic Poll/Select protocol
Topics discussed in this section include:
•
Protocol Capabilities on page 7-1
•
Application Process Interface on page 7-2
•
File-System Procedures on page 7-5
•
Address-List Format on page 7-8
•
Polling on page 7-10
•
Message Formats on page 7-18
•
Line Action by Procedure Call on page 7-25
•
Line-Error Handling on page 7-33
•
Programming Examples on page 7-38
Protocol Capabilities
The ADM-2 multipoint supervisor protocol conforms to the polling and addressing
dialog described under the heading “ADM-2 Polling Interface” in the Lear-Siegler
ADM-2 Interactive Display Terminal Reference Manual. The protocol includes the
following capabilities:
•
Check-character generation and verification performed by Envoy hardware. Retries
of operations that are in error are performed automatically by Envoy.
•
Timeouts on all line operations are designated according to established protocol
standards.
•
Support for the message formats and addressing sequences shown in Table 7-1.