POSTSCRIPT

PostScript with embedded PJL commands

PostScript files created for some Hewlett-Packard printers and other compatible printers include PJL commands that specify the use of a PostScript interpreter. DocuPrint NPS can recognize a file as PostScript if it starts with code similar to the following:

^[%-12345X@PJL ENTER LANGUAGE=POSTSCRIPT

Other PJL commands can be included at the start of the job, but will be ignored.

Note: PJL commands in locations other than at the start of the

PostScript job will cause the job to be aborted.

PostScript language extensions

DocuPrint NPS emulates some, but not all, of the LaserWriter II NTX (containing version 47 of Adobe PostScript) product-specific functionality as noted in this section.

When unimplemented operators are encountered in the PostScript master, the standard error message “Undefined” appears on the job messages page.

This section contains PostScript dictionary entries that are defined in the LaserWriter II NTX. These PostScript definitions are not part of the PostScript language.

System Dict

The following System Dictionary operators are implemented:

=print

{dup type /stringtype ne {=string cvs}}

Run

{dup == flush run}

error

The common error handling routine used by all of

 

the standard error handlers

The following System Dictionary operators are implemented:

ISOLatin1Encoding

This is a 256-entry font encoding array based on the International Standards Organization Latin1 encoding vector.

eexec

This is a decryption operator typically used for decoding Type 1 fonts. For a detailed description, refer to the Adobe Type 1 Font Format, version 1.1.

cexec

The DocuPrint 1.5 and higher cexec implementation simply consumes and ignores the data fed to cexec. The cexec operator is used to download machine code patches. As such, cexec is Motorola 6800 cpu-dependent and is not completely implemented. DocuPrint NPS does not handle PostScript

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XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES

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Xerox 721P87491 manual PostScript language extensions, PostScript with embedded PJL commands, System Dict

721P87491 specifications

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