Display Data Stream—Chapter 6
285TE 2000
5250 Terminal Emulation Programmer’s Guide
Start of Field (SF)
Function
The SF order defines input and output fields. If an input field is being
defined, it also resets any pending AID byte and locks the keyboard.
Note: Although this order can be used for output fields, it is not recom-
mended because it degrades performance. Use the SBA order instead.
Restrictions
None.
Format
SF order takes the following form with minimal information:
SF Order Attribute Length
Hex 1D Hex 01 Hex 0012
You may also include format and control information in the SF order. In
these cases it takes one of the following forms:
Note: Brackets around “format” and “control” headings indicate these
fields are optional.
SF Order [Format] Attribute Length
Hex 1D Hex 4000 Hex 01 Hex 0012
SF Order [Format] [Control] ] Attribute Length
Hex 1D Hex 4000 He x 8102 Hex 01 Hex 0012
You can only include the control word after you have provided a format
word. You can also insert several control words between the format and
attribute portions of the SF order, but these control words are not re-
quired.
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