HP PCL/PJL reference - PCL 5 Comparison Guide

2-78 Printer-Specific Differences ENWW
Alphanumeric ID Command
The Alphanumeric ID command performs several different functions
depending on the operation specified. This command:
• Specifies the type of print media on which to print a job (rather
than specifying its location)
• Specifies an ID string for different PCL objects (fonts and
macros)
• Supports the mass storage PCL enhancements for the
LaserJet 5Si/5SiMx printer disk (allowing, for example,
downloading a font with a String ID to RAM—downloading to
the printer disk must be done using PJL)
The format of the Alphanumeric ID command is as follows:
?&n#W[Operation][String ID]
The value field (#) identifies the number of bytes in the String ID.
The Operation byte determines the type of operation and the type of
object on which the operation is to be performed. The operations are
listed in the table below.
The String ID begins with the second byte and can be up to
511 characters long.
# - Number of bytes of String ID data
Default =0
Range = 2 to 512