Help with LA100 Letterprinter

[Doug Gwyn <gwyn>]

> ...  The printer seems to be
> allowing the incomming data to overload its input buffer. It then emits
> a series of beeps and prints garbage.  ...

I don't think your problem is in switch setting, but rather in the need
to enable DC3/DC! (XOFF/XON) flow control on the terminal port.  This
is done by setting the LITOUT mode and leaving the port in "cooked"
(non-RAW) mode with DECCTLQ set so that flow control is done.