I-Data 5250 ALLY - Manual (Page 183)

APPENDIX B
SCS/DCA COMMAND SUMMARY
Overview
The AGILE 5250 ALLY, like the IBM printers it emulates, accepts SCS
(SNA Control String) and DCA - FFT (Document Content Architecture -
Final Form Text) commands. These commands control formatting of the
text and other printer functions.
The 5250 ALLY’s IBM printer emulation uses the printer configuration
and the PFS definitions to simulate the appropriate behavior on the output
device (usually a printer).
The 5250 ALLY supports most of the commands that are available on any
of the IBM printers it emulates. These commands are not limited to the
emulations of the IBM printers that normally use those commands, but are
available in all of the IBM printer emulations. For example, the 5250
ALLY supports the DCA command, Justify Text Field, not only when it is
emulating a 5219 or 3812 (IBM printers that support that command), but
also when it is emulating a 5225 (an IBM printer that does not support that
command). This means that the 5250 ALLY implements the full command
set listed here regardless of the IBM printer emulation for which it is
configured.
This section lists the SCS and DCA commands that the 5250 ALLY
implements and also gives some information about the methods it uses in
emulating the IBM printer.
Note: All variables are entered as hexadecimal (base 16) values. The
parameter nn represents a count byte equal to the number of bytes
following the count byte plus the count byte itself, except where otherwise
specified.