On Sat, 2006-02-04 at 09:58 -0800, Bob Barr wrote:

> 
> Wow, does *that* term ever bring back some fond (and not-so-fond)
> memories. 
> 
> These remind me a bit of the PCB cards worth of diode ROM arrays in
> the Navy's  SPS-48 search radar computer back in the late 60's. As I
> recall, there were dozen or so of them. I'm sure that amount of memory
> would easily fit in a single EPROM chip today. :=)

But that just makes it even more interesting to see how these old
machines achieved what they did with such a small amount of logic and
memory.

I'm currently working on a program that runs a gate level emulation of a
1960's British computer called the Elliott 803.  It's a serial
architecture which uses magnetic cores as the logic elements.  It's
proving "interesting" transferring the logic diagrams into gate
interconnect descriptions.  Fault finding is proving to be very like it
was on the real machine !

There's  a screen shot of the virtual 'scope at 
http://www.btinternet.com/~Peter.Onion/E803/Gates.jpg

Peter    
  


> 
> Regards, Bob
> 

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist