I-Data 5250 ALLY - Manual (Page 218)

AGILE 5250 ALLY User’s Guide and Reference Page B-36
Command: Begin Underscore (BUS)
Format: 2B D4 nn 0A 01 bp
Printers: 3812, 5219
Action: The Begin Underscore command specifies that all
subsequent text is to be underscored until the next End
Underscore command is received.
The bp parameter specifies the set of characters for
which to bypass underscoring. Valid values are 00h
(bypass horizontal Tab and indent Tab commands), 01h
(continuous underscore) and 80h (bypass Space,
horizontal Tab, indent Tab and relative horizontal print
position commands).
Underscoring is disabled either by an End Underscore
command or by a Set Initial Conditions command.
IBMEMUL: Same as IBM.
If Option 53 — Underlining is set to 00 (!AGILE!
53=00;), PFS 27 — UNDL ON is sent to the printer
before the text to be underscored. PFS 28 — UNDLOFF
is sent to the printer after the text to end the
underscoring. Normally these PFSs turn underlining on
and off at the target printer.
If Option 53 — Underlining is set to 01 (!AGILE!
53=01;), underlining is achieved by sending underscore
characters in a second pass through the line.
275EMUL: No operation.
Command: End Underscore (EUS)
Format: 2B D4 nn 0E
Printers: 3812, 5219
Action: Ends underscoring mode previously started by Begin
Underscore command.
IBMEMUL: Same as IBM.
275EMUL: No operation.