1" paper tape buy ?
cclist at sydex.com
Wed Mar 4 13:58:35 CST 2009
On 4 Mar 2009 at 14:24, William Donzelli wrote:
> > Holds more characters, but less data than a standard 80 column card.
> Who used a 60 column format? I have a standard sized IBM punch card
> with the usual printing for 80 columns, but also for 60 columns. ???
Trick question! The IBM interpreters (552,557) could print only 60
columns across a card, because of the width of the characters. So if
you were doing all 80 columns, you got two rows of characters. Some
cards were printed with either a single 60 column legend across the
top or with 60/20 columns in 2 rows. Locating the actual column when
looking at the interpreter output without one of the 60 column
printed legends was "interesting".
In fact, you could program the interpreter to put the columns
anywhere you wanted on the card--I think the 557 (which I used) could
do 25 rows per card.
There was at least one pre-war interpreter that would print only 45
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