Apple LaserWriter Select 310 Printer - Manual (Page 44)

C H A P T E R 2
LaserWriter Select 310 Software
32 Setting Compatibility Operators
waittimeout 2
Setting Device Parameters 2
This section describes the compatibility operators that set Level 1 device parameters.
setsoftwareiomode 2
Syntax – waittimeout int
Definition This operator is the wait timeout currently in effect, that is, it is the
number of seconds the LaserWriter Select 310 printer will wait to receive
additional characters from the host before it aborts the current job by
executing a timeout. At the beginning of a job, the server initializes
waittimeout
to the default wait time returned by defaulttimeout.
However, a PostScript language program may change it to any
non-negative integer value. In interactive mode, the wait timeout is
always 0.
Standard value: 40
Error stackoverflow
Syntax int setsoftwareiomode –
Definition This operator sets the binary protocol mode of the communications
channel according to the value of int:
0 binary protocol off
100 binary protocol on
Binary protocol is standard in the LaserWriter Select 310 printer, and it
should be used by any driver that sends binary data to the printer.
A driver that does not use the binary protocol and does not filter the back
channel data when softwareiomode is 100 will see receive control
characters as quoted characters. In particular, Control-Ds will be seen as
Control-A/ASCII-D.
The softwareiomode operator does not need to be set outside the
server loop in order to be compatible with other printer implementations
of sofwareiomode. However changes to it do not take effect until the
job that makes the changes is completed.
Standard value: 100
Errors rangecheck , stackunderflow, typecheck