Path: utzoo!yunexus!geac!syntron!jtsv16!uunet!lll-winken!lll-tis!ames!ncar!tank!uwvax!rutgers!att!occrsh!rjd
From: rjd@occrsh.ATT.COM (Randy_Davis)
Newsgroups: comp.sys.att
Subject: Re: Making 3B2/310 faster
Summary: Model 5,6,700 very different from 310,400
Keywords: disks memory
Message-ID: <404@occrsh.ATT.COM>
Date: 24 Oct 88 13:36:16 GMT
Article-I.D.: occrsh.404
References: <260@beartrk.UUCP> <2838@mybest6.UUCP> <373@anumb.UUCP> <9267@watdragon.waterloo.edu>
Reply-To: rjd@occrsh.UUCP (Randy_Davis)
Organization: AT&T Network & Data Systems, OKC
Lines: 23

In article <9267@watdragon.waterloo.edu> hjespersen@trillium.waterloo.edu (Hans Jespersen) writes:
:In article <373@anumb.UUCP> adh@anumb.UUCP (a.d.hay) writes:
:>
:>somewhere, i saw that at&t has a 22Mhz (;^>) motherboard swap for 310s & 400s.
:>unfortunately, i can't remember where...
:>
:The 22MHz upgrade is for the 500s and 600s. Basically the standard motherboard
:is swaped for a 700 motherboard. The clock speed goes to 22 MHz and you
:get the entire WE32200 chip set (including 32206 MAU). I believe this upgrade
:will not work with 310s and 400s because they use different memory cards
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
:( without ECC like the 500, 600, and 700). The upgrade package include a new
:facepate with the designation 3B2/522 or 622 accordingly.

  Yes, also the model 310 and 400 use a motherboard designated as the ED4C637,
while the modle 500 and 600 use a 518A and the 700 uses a 518B.  The ED4C637
is a whole different internal architecure than the 518A or 518B, and is a little
smaller than the 518A or 518B, which makes a motherboard swap an impossibility
due to physical limitations (without swapping out almost all the internal
components).  The 518A and 518B are very similar and use the same internal
architecture.

Randy Davis					UUCP: ...(att!)ocrjd!randy
						      ...(att!)occrsh!rjd