[GreenKeys] Teletype Model 33 ASR vs. ASR33

WA5CAB at cs.com WA5CAB at cs.com
Mon Aug 15 00:47:28 EDT 2011


I agree with Don.  

In a message dated 08/14/2011 23:27:07 PM Central Daylight Time, 
Packard42 at gmail.com writes: 
> Chris,
> 
> It does not matter how far back the term goes.
> It is still as incorrect today as it was when the computer people  
> first wrote it down.
> 
> Don
> K9TTY
> 
> 
> 
> On 14 Aug 2011, at 10:43 AM, Chris Elmquist wrote:
> 
> On Sunday (08/14/2011 at 11:15AM -0400), Christian Gauger-Cosgrove  
> wrote:
> >
> >The swapping of the type designation (KSR, ASR, RO) and model number
> >on teletypes is due to the computing field. On machines that spoke
> >ASCII the model 33 was a far, far more common terminal then it's more
> >robust cousin the 35. This was due to cost, for example an excerpt
> >from the 1970 price list for the DEC PDP-15:
> 
> Absolutely.  I was going to respond similarly--  I have in front of me
> the assembly manual for the MITS Altair 680b microcomputer (c) 1976,
> which throughout refers to ASR33/KSR33 when discussing the 20mA
> console interface.
> 
> So I think the precedent goes back at least 35 or 40 yrs.
> 
> Chris N0JCF
> 
> -- 
> Chris Elmquist

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