[TUHS] Was pcc ever ported to the CDC6600?

Kay Parker kayparker at mailite.com
Sat Jan 21 22:51:42 AEST 2017

> My memory of the Kyber (as we called them; we had a 72)
wasn't it a CDC Cyber? 

On Sat, Jan 21, 2017, at 04:38 AM, Dave Horsfall wrote:
> On Thu, 19 Jan 2017, Steve Johnson wrote:
> > PCC ended up being ported to many dozen different architectures, so it's 
> > quite possible, but I don't recall it being done.  It was kind of a 
> > dinosaur by the early 70's.  I'm not even sure that it had memory 
> > protection, and it certainly didn't have paging.  And the I/O system was 
> > strange.  So porting Unix would have been next to impossible.
> My memory of the Kyber (as we called them; we had a 72) was that it was 
> not character-addressable, but 60-bit word-addressable, thus making
> string 
> handling somewhat difficult.  Don't get me started on its utterly broken 
> architecture...  I have thankfully lost my programming manual for the 
> beast.
> > The main thing I remember about the 6600 was that it didn't have parity 
> > bits on its memory.  So people used to run the same program three times 
> > and if two of the answers agreed, they published...
> Parity only slowed it down, and besides, hardware never failed...
> My fondest memory of the thing was its command completion; I would start 
> to type "O, TR" and it would fill out "O, TRANSACTION TERMINAL STATUS".  
> Which reminds me that my worst memory was its console keyboard, with "0"
> on the left...
> -- 
> Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will
> suffer."

  Kay Parker       
  kayparker at mailite.com

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