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68
set at line 20, a vertical tab (or <VT>)
will move you to line 20
whether you start from line 5 or line 19.
The vertical tab is not set at the power-on default. If you send
a CHR$(ll),
which is the ASCII code for < VT > , before we
have set up tabs advance the paper one line. Enter this program
to see how this works.
10 ' Demo of vertical
tabs
40 LPRINT CHR$( 11) ;"FIRST TAB."
50 LPRINT CHR$(ll);"SECOND
TAB."
60 LPRINT CHR$ (11) ; "THIRD TAB. *'
70 LPRINT CHR$(ll);"FOURTH
TAB."
Now, let's set some vertical tabs of our own. Add these lines
to the program:
20 LPRINT CHR$(27);"B";CHR$(lO);CHR$(15);
30 LPRINT CHR$(25);CHR$(30);CHR$(O);
(ESC)"B"
is the command
to set vertical
tabs. Like the
horizontal tab setting command,
tab positions must be defined
in ascending
order. Our example sets vertical tabs at lines 10,
15,25 and 30. Then the CHR$(ll)
in each of the following lines
advances
the paper to the next vertical tab. The printout
is
shown below.
FIRST TAB.
SECOND TAB.
THIRD TAB.
FOURTH TAB.
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