CP6100 I/O Process Programming Manual

Introduction
WHAT IS CP6100?
CP6100 is a general-purpose I/O process pair. It provides the
file system interface for application processes in a Tandem host
to communicate with protocol modules in a Tandem 6100
Communication Subsystem. Each protocol module controls one line,
as illustrated in Figure 1-1. Tandem currently offers the
following protocol modules as products:
• 6100 BSC. This protocol lets the Tandem system act as the
primary or secondary station on a binary synchronous
point-to-point line.
• 6100 ADCCP. This protocol lets the Tandem system act as a
supervisor, tributary, or combined station on an ADCCP, HDLC,
or SDLC line.
• 6100 Multipoint Supervisor--TINET. This protocol lets the
Tandem system act as the supervisor on an asynchronous
multipoint line. Terminals conform to the protocol defined
for Texas Instruments Numeric Entry Terminals.
• 6100 Multipoint Supervisor--Burroughs. This protocol lets
the Tandem system act as supervisor on a multipoint line.
Terminals follow the Burroughs Basic Poll/Select Protocol,
the NCR Multipoint Protocol, or the protocol for Lear
Siegler ADM-2 Data Display Terminals with the polling
option.
Other protocols may become available during the life of this
manual.
CP6100 gives the application extensive control over the line.
Not only does the application transfer data; it also initiates
protocol sequences and controls most error recovery. In some
protocols, for instance BSC, the application even embeds control
characters in outgoing messages, and receives control characters
in incoming messages.
1-2