Specifications

CHAPTER 2
LaserWriter 16/600 PS Software
44 Interpreter Parameters
Device Parameters 2
Each PostScript interpreter supports a collection of input/output storage devices such as
communciation channels, disks, and cartridges. You may set device parameters using the
setdevparams operator, and you may read them using currentdevparams. Like
system parameters, device parameters require a password, are global to the PostScript
environment, have similar persistence characteristics, and some of them can be stored in
nonvolatile storage.
Device parameters are different from both system and user parameters in that device
parameters may be interdependent. This means that the legality of a given parameter
may depend on the value of another parameter.
Device parameters fall into sets that correspond to a particular communications device
(%EtherTalk%, %parallel%, and so on). Some device parameters correspond to a
software entity such as a language emulator.
Note
Even if two printers are using the same I/O storage device, the
parameters in the set may be different because the hardware support
for that device is different. ◆
Device Parameters for Type /FileSystem Devices 2
The LaserWriter 16/600 PS printer supports %disk0% and %rom% file system devices.
Table 2-11 lists the parameters for %disk0% devices.
ValidNV boolean true Indicates whether nonvolatile
memory is currently used to store
persistent parameters. This is a
read-only parameter.
WaitTimeout integer 40 Indicates the value in seconds to
which the user parameter
WaitTimeout is initialized at the
beginning of each job. This parameter
may be set to 0 or any number larger
than 0. A value of 0 indicates an
infinite wait period.
Table 2-10 System parameters in the LaserWriter 16/600 PS printer (continued)
Key Type Default Description