AGILE 5250 OPTIMA User’s Guide and ReferencePage 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.
The OPTIMA sends the PFSs UNDL ON> and
UNDLOFF> to begin and end underscoring. It also uses
the underline PFSs instead of the underscore character if
it is used to overstrike another character. This is
especially fast on dot matrix printers that can both print
and underscore text in one pass of the printhead. It also is
usually more attractive, providing a smooth, continuous
underline.
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.