"Eisboch" wrote in message
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"Wayne.B" wrote in message
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On Wed, 5 Dec 2007 08:52:20 -0500, "D.Duck" wrote:

I think the confusion here is comparing the Teletype machines and the IBM
machine. The Teletype Model 28 is 5 bit baudot and the Teletype Model
33/35
is 8 bit ASCII.

That's my recollection also. The model 28s used a "mode shift" key or
some such to effectively double the character set. If the "mode
shift" code arrived garbled, the receiving machine would miss
everything that followed and print gibberish.


For such a mechanical contraption, they were amazing.

http://video.google.com/videoplay?do...544&q=mod-tage

Eisboch


Still remember the first KSR-33 I ever saw. Was working in the Western
Electric Warehouse when the forklift operator got a pallet with one off the
top of the storage racks. Someone had not strapped down the unit, and the
top of the rack must have been 25' in the air. That KSR33 nosedived to the
floor and parts went everywhere. Later when I had to work on the Teletype
that NCR used as the console writer on the later Century systems, I wanted
to drop more of them 25'. They used the light duty model, forget the
number, that was designed to receive 3-4 messages a day and only turned on
when a message came in. NCR ran them 24/7 and the shafts eventually were
cut almost in half by the oillite busings wearing out.