To reset a LaserWriter's baud rate, even to a rate not available though
the hardware DIP switches, send the following PostScript code to the
LaserWriter:
statusdict begin 25 sccbatch exch pop
68 eq {stop} if
serverdict begin 0 exitserver
statusdict begin 25 19200 68 setsccbatch
This example sets the LaserWriter to 19,200 baud (using 8 data bits and
DTR flow control). The change does not take effect until the end of the
current job. The current job, in this case, is the PostScript code you
are sending. These settings are then in effect for the duration of the
next print job, and in any case will be reset within 30 seconds by the
switch polling function described below. This means you must start your
print job within 30 seconds in order to retain the new parameters.
If the hardware switches are used to reset the bud rate, the switches
override the rate set via software.
(The test sheet will not show 19,200 because the LaserWriter defaults back
to switch settings when powered up.)