17 Apr
2005
17 Apr
'05
9:38 p.m.
On Sunday 17 April 2005 20:24, Heinz Wolter wrote:
--snip--
Don't want to start the old "Ebay ~is~ the
market" thread up again... but
on a technical note - the listing claimed that it was the fastest PDP11 of
the blinkenlights
machines made by DEC.. Is that true?
I expected an 11/70 to be instruction for instruction faster - but
add all the cache and complexity - maybe the 55 with bipolar ~was~ faster?
How about compared to a 11/70 with a PEP70 instead of factory memory and
cache?
Isn't a 55 just a 45 with bipolar instead of core? or was that a 50?
Read "Computer Engineering" (Gorden Bell, J. Craig Mudge, John E. McNamara),
Copyright 1978 by Digital Equipment Corporation
Page 408
--------
Model Basic Instructions Floating Point
Inst. per second* Inst. per second
-------------------------------------------
11/70 36 671
11/55 41 725
* Relative to 11/03
No brainer - the 11/55 wins hands down.
Lyle
--
Lyle Bickley
Bickley Consulting West Inc.
http://bickleywest.com
"Black holes are where God is dividing by zero"