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Page A-9APPENDIX A INTERFACING XEROX PRINTERS
1. A job from one source defines and uses a UDK character, but does
not end its job with a s+Xd to undefine the UDK character.
2. A second job from the System that does not define or use a UDK
character tries to use the previously defined UDK character as a
printable character.
In this case, the failure that will occur in step 2 is actually caused by the
first job not following the rules.
To reduce these kinds of problems, the 5250 ALLY provides Auto UDK
character translation. Auto UDK character translation works, because
regardless of the state of the UDK character definition, the XES mode
printer continues to accept the s character as a UDK character
equivalent.
When Auto UDK translation is enabled, the 5250 ALLY translates all
occurrences of the UDK character to the s character for the duration of
the =UDK= character assignment. The =UDK= assignment is never actually
passed to the printer when this mode is enabled.
Line Endings
The 5250 ALLYs handling of the XES command set is not limited to
simple character translation. The 5250 ALLY provides several special
features to assist in the proper generation of the line endings required by
some XES commands.
One common problem in generating proper line endings to some XES
commands is that it is often difficult or impossible to control the SCS
commands generated by the IBM host System.
Support for all types of SCS line endings
The 5250 ALLY automatically translates any possible line ending
condition in the SCS command set into a proper <CR><LF> line ending.
This translation includes all single byte and multiple byte SCS commands.
This feature is particularly important for environments in which the
System will be generating the data stream. For example, it is possible to
include XES commands to control the formatting of screen prints or word-
processed documents (DisplayWrite/36, Text Management, Office Vision/
400, etc.) without concern for the methods used by the System or
application software to terminate lines.