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XEROX APPLICATIONS
General Information
Xerox distributed printers supported by the ULTRA include the following
models: 2700, 3700, 4030, 4045, 4197, 4213, 4235 and 4700. The ULTRA
has a number of special features that support Xerox printer functions. For
instance, it supports output to Xerox printers using the EBCDIC character
set.
The ULTRA also supports Xerox transparency, triggered by 36h in the data
stream. Refer to Option #5 in Section 5 Configuration Options and to
Section 11 Transparency Modes for details on Xerox 36h transparency.
Other special Xerox features supported include UDKs (user-defined keys),
XPAF (Graphic Windows and EBCDIC font downloads) and Metacode.
ULTRA implementation of these features is described below.
User-Defined Keys (UDKs)
Xerox Corporation produces a number of printers that have very
sophisticated font and graphic capabilities. The ULTRA offers special
support for Xerox printers in XDPM mode, also referred to as XES mode or
UDK mode. XES mode is the native Xerox print mode for Xerox 2700,
3700, 4030, 4045 and 4213 printers. The XDPM mode on the Xerox 4235
also provides the XES command set.
Commands that control these printers are always preceded by an escape
character. The escape character is sometimes not a legal character in a
mainframe environment. Therefore, UDKs (or user-defined keys) were
implemented to allow any one of 256 different characters to be assigned as
the escape character. The ULTRA keeps track of which character is
currently being used as the UDK.
Note: The character assigned as the UDK should be different than the
character assigned as pseudo transparency Trigger 1. Otherwise,
unpredictable results may occur.
SECTION 16