Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!uunet!nwnexus!apex!chuckh
From: chuckh@apex.UUCP (Chuck Huffington)
Newsgroups: comp.arch
Subject: Re: IBM 7094 II
Message-ID: <102@apex.UUCP>
Date: 1 Dec 90 01:13:07 GMT
References: <9011272349.AA25956@ucbvax.Berkeley.EDU>
Reply-To: chuckh@apex.UUCP (Chuck Huffington)
Organization: Apex Computer Co., Redmond  WA
Lines: 24

In article <9011272349.AA25956@ucbvax.Berkeley.EDU> jlol@ee.byu.edu writes:
|I was reading a paper which reported performance of an algorithm in
|the form of execution times on an IBM 7094 II.  Does anyone know how
|fast this machine was and how much memory it might have had?  As a
|reference point, the paper was published in 1965.

Ah, one of my favorite old machines.

32K words of 36 bit memory, in two banks of 16K.  Odd words in one bank
and even words in the other.  This allowed both words of a double
to be fetched at once without worrying about alignment.  There was a
CE mode that changed the banking to high and low half of memory.  This
was used for memory diagnostics.

I can't remember the clock speed, but it seems to me the major cycle
time was 1 microsecond.  Most instructions took a couple of cycles
with a fair bit of overlap (2 instruction "pipeline").  The overlap
could also be disabled to aid troubleshooting.

I'm pretty sure I still have a set of prints and CE manuals at home.
I'll try and check the cycle times and report further.

				Chuck Huffington
				uunet!apex!chuckh


Brought to you by Super Global Mega Corp .com