NEC PC-8000 Series User Manual page 37

Note: in the proportional printing mode, the
len
margin set command cannol be used. Set the
left margin when the printer is in a mode
other than the proportional printing mode to
make it effective.
10.10 Line Spacing for N Lines
Execute the following statement for a line spacing of
"0"
number of lines.
LPRINT CHRS(&Hlfl;CHRS(&Hle+n);
where 1
S"
n ~ 15
10.11 Vertical Tabulation
The following section describes the Vertical Form Unit
(VFU). This device has been designed to facilitate auto-
matic feeding of a form for a predetermined number of
lines before printing. In other words, the VFU provides a
vertical tab function.
For the PC8023A-C. the form length per page is
considered to be 66 lines; the first line is called TOF (Top
of Form Position) and the last line to be printed, BOTIOM.
When the BOTIOM position is sensed while printing, the
printer
automatically feeds the form to the
next TOF
position. This function allows a bottom margin to be set.
(The BO'ITOM is set at only one position per page.)
By setting the VFU, vertical tab positions can be set at
arbitrary Hnes between the TOF and the BOTTOM. When
the vertical tab code is sent from the
PC-BOOlA,
the form
in the printer is automatically fed to the next vertical tab
position. The VFU has a 6-{:hannel memory in which 6
vertical tab positions (including the TOF) can be stored.
CHI is used for the TOF
position and both CHI and CH2
for the BarTOM position. In CH2, vertical tabs are set at
6-line intervals for the initial values when the power is
turned on. Therefore, when the VT code (&HB) is
transferred from the
PC·BoolA
to the printer, the form is
-2&-
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