Owner`s manual

25
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To select a specific peripheral in multiple peripheral applications, you
must send a specific port select sequence which consists of the Port
Select Code (factory set is $SELECT), the desired printer port number,
and a terminating character: Enter/Carriage Return or Line Feed . The
port select sequence is trapped if valid and not passed to the
peripheral. The printer port number becomes a default value on all
subsequent output until another printer port is selected.
A print job can be sent to a printer port other than the user's default
printer port without changing the default by sending a temporary port
select sequence which consists of the Port Select Code immediately
followed by capital "T", the desired printer port number, and a
terminating character ( Enter/Return or Line Feed ). The next print job
sent will go to the temporary printer port. Any subsequent print job sent
without a port select sequence preceding it will be sent to the default
printer port.
NOTE: If the Model 24 is reconfigured to either add or delete a printer
port (i.e., if you change the Port Designation of a particular port), all
default printer port assignments for the computer ports are erased and
replaced with "0" for contention mode (see Section 6.2.3 ).
There are two modes for sending the Port Select Code. In Port Select
Mode A (port selection anytime while sending), the Model 24 looks for
the Port Select Code anytime. If no Port Select Code is received, the
data will be routed to the default peripheral.