Owner`s manual
31
You may use a DOS batch file to send a port select sequence. The
DOS command typically used is the ECHO command. An example of
the ECHO command used to select a printer connected to Port 2 using
the default Port Select Code is the following:
ECHO $SELECT2>LPT1:.
This command should be entered in all capitals with only one space
between ECHO and the $. Please refer to your DOS manual for
instructions on creating DOS batch files.
Programs such as Word Perfect and WordStar typically send a printer
initialization string before any data. You may imbed the port select
sequence in this string to select a printer. For example, Word Perfect
allows you to edit the printer definition file for a specific printer by using
the PTR command. The port select sequence for the Model 24 would
typically be inserted prior to any escape codes for the printer. Please
see the documentation for your application package(s) for more
information on editing printer initialization strings.
"(
)
All serial ports on the Model 24 feature full duplex communication. The
timeout interval is based on computer port input inactivity only. Full
duplex allows the printer device to transmit a limited amount of data to
the connected computer during the input inactivity timeout period.
Communication back to the computer uses a 256-byte buffer with no
handshaking.