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Programming7–36
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