PLATO and learning models (was Re: NuTek Mac comes)

Paul Koning paulkoning at
Sat Jul 16 12:34:30 CDT 2016

> On Jul 15, 2016, at 9:08 PM, Chuck Guzis <cclist at> wrote:
> On 07/15/2016 05:47 PM, Paul Koning wrote:
>> Graphics terminals were quite rare in the early 1970s, at least at a
>> cost allowing them to be installed in the hundreds, and with
>> processing requirements low enough for that.  I remember, around the
>> same time, the Tektronix 4010.  But that was far less flexible; it
>> could only draw, not erase, unlike the PLATO terminals.
> Surely you remember CDC IGS from the 70s.  I loved watching the displays
> being drawn on those big radar CRT displays--one color while drawing and
> persisting in another.
> They were "terminals" of a sort, no?

IGS?  Two colors?  Don't recognize that.  There's the 6000 console (DD60), very expensive, requiring a dedicated processor to feed it, and limited to uppercase text only plus very small amounts of graphics (a dot at a time, 3 microseconds per dot).


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