"Calif Bill" wrote in message
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"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.


That 300 Megabyte DEC drive the RM05 was a CDC build drive. The RM03 was a
smaller version. When I was an engineer for System Industries we sold the
drive as a CDC 300 MB drive and disk controllers that looked just like the
DEC controllers software wise. Plus we could hook several systems up to the
same controller for shared data.