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ZERO SUPPRESS (OCTAL:
57).
On Zero Suppress, the next data character i s ignored; and the
next format character i s printed if
it
i s a printable character. After considering this last format
character, spaces will be inserted in the print line until: (a) a non-zero data character i s de-
tected, o r (b) a period appears in the format data. It should be noted that once a Zero Suppress
has been put into effect, the print line data i s inspected only for a non-zero data character, and
the format control data i s inspected only for a period. A $ symbol in the format data also initiates
spaces in the print line in the same manner a s Zero Suppress except that the next data character
i s not ignored after the $ symbol i s printed.
The following i s an example of how editing i s performed with the printer controller:
5 3 73 35 3 5 7 3 35 35 3 3 35
F o r m a t W o r d s
1
$
,
1
,
I
D a t a W o r d s
9
9
9
9
9
9
9
9
9
P r i n t Line $
9
,
9
9
9 , 9
9
9
.
9
9
Depending upon the value contained in the data words, the following amounts (using nines for
example) would be printed on the high speed printer under control of the format control char-
a c t e r s above.
When zero suppression on the print line i s in effect a s a result of a dollar sign o r an octal 57
(zero suppress) in the format words, a comma in the format word i s not printed (but a blank i s
printed instead) unless the data character preceding the comma in the format word i s a non-zero
character.
CHECKING FEATURES
The control panel on the Printer Controller contains indicator lights that show status of the
printer and indicate alert conditions. In addition to the Ready and Off-Line indicators, there a r e
the Parity Alert to show when a parity e r r o r has occurred and a Paper Alert to show when paper
is torn o r used up.
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