Xref: utzoo comp.sys.ibm.pc:28885 comp.binaries.ibm.pc.d:3032
Path: utzoo!attcan!uunet!crdgw1!steinmetz!sungod!davidsen
From: davidsen@sungod.steinmetz (William Davidsen)
Newsgroups: comp.sys.ibm.pc,comp.binaries.ibm.pc.d
Subject: Re: JDR 386 Motherboard
Keywords: motherboard jdr 386 problems upgrade
Message-ID: <13814@steinmetz.ge.com>
Date: 16 May 89 16:58:22 GMT
References: <506@dekalb.UUCP>
Sender: news@steinmetz.ge.com
Reply-To: davidsen@crdos1.UUCP (bill davidsen)
Organization: General Electric CRD, Schenectady, NY
Lines: 18

In article <506@dekalb.UUCP> greg@dekalb.UUCP (Greg Philmon) writes:

|    Next I discover that my RAM situation is not acceptable.  The boards memory
| is divided into two banks of 36 chips each.  I only have 18 chips.  Uh oh.  Now
| what?  I have 1.5 meg in my "old" AT, but it's all 120ns chips.  Why did I
| assume you could add memory in 1 MB increments?  The JDR catalog said so!  

  Beg to correct you, but you *can* expand in 1MB increments. The board
takes either one or two sets of 36 chips, which may be 256k or 1mb. If
you had 256k chips you would be working in increments of (surprize) 1MB.

  The information you read was *not* incorrect, it simply did not go
into all the details. Since the chip access 36 bits at a time (32 data +
4 parity), it becomes obvious after you think about it how to do the 1MB
increments. Enjoy, you'll like 4MB better anyway ;-)
	bill davidsen		(davidsen@crdos1.crd.GE.COM)
  {uunet | philabs}!crdgw1!crdos1!davidsen
"Stupidity, like virtue, is its own reward" -me