User`s guide

DC 900-1340I 209
Appendix
B
BSC 2780/3780 Control
Procedures
This appendix defines the control procedures for the BSC 2780/3780 protocol.
Note
This appendix, along with Chapter 5 and Chapter 6, should be
read by programmers who are interfacing an application program
to a BSC 2780/3780 environment. If you are programming
BSC 3270, refer to Chapter 3, Chapter 4 and Appendix A.
B.1 BSC 2780/3780 Communications Control
The client and BSC 2780/3780 software use the command and response messages to
control data communication on the links. The following sections present typical data
exchange situations. For each of these examples, the ICP message buffer size is 1024
bytes, and the transmission buffer size is 256 bytes.