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Printronix MVP Series User Manual

Page 160

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Programming

7–36

Horizontal Tab

Horizontal tabs enable you to put text at a precise column in a print line. Up

to 28 stops may be set at a time, spanning character columns 1–216.

Loading a Horizontal Tab Table

You may design and load your own horizontal tab table and tab the print

head with CHR$ (9), the decimal value of ASCII control character HT. To

make use of the custom Horizontal Tab feature you must first load a tab table

and then make calls to the table with CHR$ (9).

The proper syntax for loading the tab table is:

LPRINT ESC “D”CHR$(N2);..CHR$(128) (or CHR$(0)) where:

ESC “D”

=

load HT table

CHR$(n)

=

decimal numbers (1 to 216) indicating tab
stops at designated character column number.
(See “Hard Copy Considerations” in this chapter.)

CHR$(0)

or CHR$(128)

=

load HT terminator

NOTE: CHR$(0) and CHR$(128) are not allowed as tab stops.

Calling a Horizontal Tab Table

After the horizontal tab table has been loaded, you may use the table by

sending CHR$ (9) to call each tab.

Example: LPRINT...DATA...CHR$ (9)DATA