Asynchronous Terminals and Printer Processes Programming Manual

TERMINAL PROGRAMMING CONSIDERATIONS
Terminal and File Access Types
S5073-009
Application process has sole
access to terminal
Application process calls SETMODE,
specifying BREAK access and
BREAK mode
Application process calls
SETMODE, specifying
normal access and
normal mode
Terminal Access Type:
Only BREAK
Access Permitted
Any Access Permitted
File Access Type:
BREAK Access
Normal Access
Figure 4-4. Exclusive Access Using BREAK
COMMUNICATING WITH TERMINALS THROUGH MODEMS
When your program is interacting with terminals that are con-
nected to the host through modems, the modems are for the most
part transparent to your program. You must be aware, however,
that when you open a terminal that is connected through a modem,
the OPEN procedure does not ensure that a communication link has
been established.
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