Apple Personal LaserWriter NTR Spezifikationen PDF herunterladen (Seite 29)

CHAPTER 2

PostScript Software

Interpreter Parameters 19

System Parameters 2

System parameters alter the overall conﬁguration of the printer. You can set system

parameters using the setsystemparams operator and read them using the

currentsystemparams operator. You must use a password to change system

parameters. System parameters are not subject to save and restore. Their values

persist across jobs and may persist across power cycles. Table 2-7 lists the system

parameters present in the Personal LaserWriter 320 printer.

MaxOpStack integer 100000 Determines the maximum number of elements

in the operand stack. It may be set to 0 or any

number larger than 0.

MaxPatternItem integer 20000 Determines the maximum number of bytes

occupied by a single cached pattern. It may be

set to 0 or any number larger than 0.

MaxScreenItem integer 12000 Determines the maximum number of bytes

occupied by a single halftone screen. It may be

set to 0 or any number larger than 0. The initial

value is 3000 bytes per MB of installed RAM,

up to a maximum of 12,000 bytes.

MaxUPathItem integer 5000 Determines the maximum number of bytes

occupied by a single cached user path. It may

be set to 0 or any number larger than 0.

MinFontCompress integer 1250 Sets the threshold at which a cached character

is stored in compressed form instead of as a

full pixel array. It may be set to 0 or any

number larger than 0.

VMReclaim integer 0 Enables or disables local garbage collection:

0 enables automatic collection

-1 disables it for local VM

-2 disables it for both local and global VM

VMThreshold integer 40000 This is the frequency of garbage collection. It

is triggered whenever the number of bytes

indicated by the setting has been allocated. It

may be set to 0 or any number larger than 0.

WaitTimeout integer 40 Indicates the current wait timeout, which is the

number of seconds the interpreter waits to

receive additional characters from the host

before it aborts the current job by executing

a timeout error. It may be set to 0 or any

number larger than 0.

Table 2-6 User parameters in the Personal LaserWriter 320 printer (continued)

Key Type Default Description

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 65 66

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