AN00017.TXT

Advanced Communication Board Developer's Toolkit 1995
    

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Subject: BISYNC Communications with the ACB.

In the 1960s, IBM developed a synchronous protocol based called Binary
Synchronous Communications. This protocol is often referred to with the
mnemonic BSC or BISYNC. BISYNC is a character oriented protocol that uses
special pre-defined characters to determine the various parts of the data
stream and control the flow of data between the points of communication.
BISYNC may be implemented with the ASCII, EBCDIC or Six Bit Transcode
character sets. This is a very popular synchronous protocol and is used widely
to interface with mainframe computer systems and video terminals. All ACB
adapters can communicate with the BISYNC protocol. The following is a listing
of BISYNC variations and references.


Binary Synchronous Communications - General Information
GA27-3004-2
IBM Corp., 1970

DDCMP
Digital Data Communications Message Protocol
Digital Equipment Corp. (DEC), 1974.