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VERTICAL FORMAT UNIT
Vertical formatting in the Series 100 printers is controlled by a paper tape in the Vertical
Format Unit. This unit is located on the upper left side of the printer just under the left cover.
The tape is a standard l-inch wide, 8-channel, black opaque paper tape. The sprocket
holes, located between Channels 3 and 4, have a 1/10 inch pitch between holes. Channel 5
defines the Vertical Tab (VT) format and Channel 7 the Top of Form (TOF) format. The tape
reader and paper feed mechanisms are mechanically linked so that each line feed advances both
the paper by one line and the paper tape by one sprocket hole, on a 6 line-per-inch printer.
Reception of a Vertical Tab code (octal 013) advances the paper (and tape) to the next
hole in Channel 5. For example, if the holes in Channel 5 are spaced six sprocket holes apart,
each Vertical tab will advance the paper six lines (one inch).
Similarly, reception of a Form Feed code (octal 014) or pressing the TOP OF FORM
switch advances the paper (and tape) to the next hole in Channel 7.
As an optional feature on some printers, a hole in both channels 5 and 7 indicates bottom
of form (BOF). Detection of this condition automatically advances paper to the top of the next
form. BOF and TOF indications on tape must be separated by at least one line.
On the standard paper tape shipped with the printer, Vertical Tab holes are spaced six
sprocket holes apart in Channel 5, (corresponding to a l-inch tab) and Top of Form holes are
spaced 66 sprocket holes apart in Channel 7 (corresponding to an l1-inch form).
VERTiCAL FORV,':'T
TAPE READER
\ERTI(AL FORMAT
TAPE
8
VERTICAL FORMAT TAPE
DIRECTION OF
TAPE MOTION
•
SPROCKET HOLES
~
BETWEEN
g
CHANNELS 3
&'I
g
BOTTOM OF FORM
I
0
0
o-r--
CHANNELS 5 &
7
~
.
g
I
(OPTIONAL)
SPACING
(1/10" PITCH)
g
I
TOP OF FORM
~
TCHANNEL 7 ONLY
g
VERTICAL TAB
o
CHANNEL50NLY
o
o
o
o
o
o
o
~l"WIDE~
USING TELETVPEWRITER -0
GENERATE A TAPE
SPACING:
CONTROL SHIf-
I
&
P
CH·~,II,J"~[~
-
cO~-:qCi
...
'~
CH.ANNH 7'
"HIFT P
CHANNEL 5
&
7:
ASCII P
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