From: Clayton Frank Helvey <msspcva(a)yahoo.com>

The one thing to remember about the TRS line is that the printer output is not emitting <CR><LF> pairs but rather <CR> with implied <LF>, so most of the DOS-centric printers will be unhappy. (<CR> is shorthand for the carriage return character, ASCII code 13 decimal; <LF> is linefeed, ASCII code 10 decimal)

You used to be able to tell printers that they should interpret <CR> as <CR><LF>, but I don't know if the newer ones will still do that. Or, you can set up the TRSDOS O/S to add them in (at least under LSDOS/TRSDOS on a Model 4).