Dave Land wrote:
Very cool stuff! Must have taken days, just to print those at the
speeds of
the average daisy wheel printer in that time period.
:) (or teletype
if that was
the weapon of choice)
Typically these were printed on high-speed line printers that ran from
600 to 1200 (or more) lines per minute.
At these speeds, these didn't take all that long to print. They did,
though, use up a lot of ribbon ink, which is why a lot of computer
operators didn't like it when users would spew these out to the (usually
located in the machine room) line printers. Many times, when I was an
operator, I would kill off jobs printing these to the printer simply
because of the wear and tear on the printer, and the ribbon use. I was
authorized to kill these kinds of print jobs for these reasons. The
jobs were pretty easy to identify by ear, as the printer would make
rather unusual noises when printing these kinds of things because of the
overprinting used to make the different shading.
Rick Bensene
The Old Calculator Museum
http://oldcalculatormuseum.com