Path: utzoo!mnetor!uunet!steinmetz!davidsen
From: davidsen@steinmetz.steinmetz.UUCP (William E. Davidsen Jr)
Newsgroups: comp.arch
Subject: Re: Cray 2 has 2GW address
Message-ID: <9688@steinmetz.steinmetz.UUCP>
Date: 25 Feb 88 18:53:14 GMT
References: <9495@steinmetz.steinmetz.UUCP> <3815@megaron.arizona.edu> <15781@beta.UUCP> <9653@steinmetz.steinmetz.UUCP> <235@amelia.nas.nasa.gov>
Reply-To: davidsen@crdos1.UUCP (bill davidsen)
Organization: General Electric CRD, Schenectady, NY
Lines: 20

In article <235@amelia.nas.nasa.gov> fouts@orville.nas.nasa.gov (Marty Fouts) writes:
| In article <9653@steinmetz.steinmetz.UUCP> davidsen@kbsvax.steinmetz.UUCP (William E. Davidsen Jr) writes:
| 
| >While there are always problems which could be solved to another
| >significant digit with more power, even on the Cray2, which can have up
| >to 2GB of memory, few problems larger than 500MB are run because the CPU
| > [...]
|
| You appear to be onfusing two different limits on the Cray 2.  The
| address space is 2^32 words, which are 64 bits.  The Cray 2 can
| address 2GW = 16GB of memory.  The 2GB limit on the current
| implementation is the number of 256kbit parts that can fit into the

As I said, the Cray2 can have 2GB. Since the memory is virtual I don't
*care* how much it can address, only what can be used. Currently that's
2GB. I don't *feel* confused ;->
-- 
	bill davidsen		(wedu@ge-crd.arpa)
  {uunet | philabs | seismo}!steinmetz!crdos1!davidsen
"Stupidity, like virtue, is its own reward" -me