Path: utzoo!attcan!uunet!know!sdd.hp.com!elroy.jpl.nasa.gov!decwrl!ucbvax!YALEMED.BITNET!BEEBE From: BEEBE@YALEMED.BITNET (Rick Beebe) Newsgroups: comp.sys.misc Subject: RE: IBM PC-XT RAM Chips? Message-ID: <0F0773BBD41F000126@Venus.YCC.Yale.Edu> Date: 1 Nov 90 16:53:00 GMT Sender: usenet@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 23 >From: Rob Caton > >I recently required a genuine IBM XT motherboard with 0k. The date on the >BIOS chip is 1986 and elsewhere on the board it says 256 - 640k. My question >is twofold: can this board be populated with 640k using 256x1 and 64x1 >chips, and if so, what are the proper dipswitch settings? The answer is Yes and I don't know. Sorry. Near the end of their life, IBM switched to a 640K motherboard for XT's. I myself have only seen one, and I'm afraid I don't have any docs on them. Your service rep (who said all true IBM XT boards have 256 - 64k written on them) has probably never seen one. ----------------------------------------------------------------------------- Rick Beebe (203) 785-4566 ***** ***** ***** * * Biomedical Computing Unit * * * ** * Yale University School of Medicine * * *** * * * 333 Cedar Street, New Haven, CT 06514 * * * * ** * * * * * BEEBE@YALEMED.BITNET beebe%biomed.decnet@venus.ycc.yale.edu -----------------------------------------------------------------------------