Apple LaserWriter Select 310 Specifications download pdf (Page 44)

CHAPTER 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

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Apple LaserWriter Select 310 Specifications Page 44