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Appendix B
Device Drivers
Device drivers set up your computer for use with peripheral devices, such
as: printers, disk drives, and so forth. The PRN, CON, and COM devices
are already set up for you. Type a filename or one of these device driver
names in the to command fields of the PRINT and LIST commands. PRN
prints or lists to the printer. CON lists to the console (computer screen).
COM lists to the communications, or RS-232 port.
The Tandy 600 line feeds after every line of text. Because of this, the
printer driver (PRN) is set up for printers that do
not
add a linefeed at the
end of every line. If your printer does line feed automatically, you must
change PRN to suppress the extra linefeed and avoid double-spaced lines.
To determine whether your printer adds the extra line feed, print a small
Word document or other Tandy 600 file. Ifit prints single-spaced, no
changes are needed. If it is double-spaced, you must either change the PRN
driver using the INSTALL program that is included on your master
diskette or change the setting of the CR function control (DIP) switch to
CR
=
CR (carriage return only, no line feed).
For example, when printing to a DMP-2 lOOP, an extra Iinefeed appears if
you do not change the PRN driver or the DIP switch. To suppress the extra
linefeed, perform one of these actions:
A - Change the PRN driver according to the instructions in "Installing the
Printer Driver."
B - Turn off the printer, and set the DIP switch 6 to CR
=
CR by putting it
in the ON position (towards the front of the printer). Turn on the printer.
241
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