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From: wbonner@eecs.wsu.edu (Wim Bonner)
Newsgroups: comp.sys.misc
Subject: Re: IBM PC-XT RAM Chips?
Message-ID: <1990Nov01.230512.27140@eecs.wsu.edu>
Date: 1 Nov 90 23:05:12 GMT
References: <9011010808.AA05178@ucbvax.Berkeley.EDU>
Reply-To: wbonner@yoda.UUCP (Wim Bonner)
Organization: Washington State University, Pullman
Lines: 16

In article <9011010808.AA05178@ucbvax.Berkeley.EDU> C08926RC@WUVMD.WUSTL.EDU (Rob Caton) writes:
>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?

You should be able to populate bank 0 and 1 with 256k chips, and do the next
two rows with 64k chips. If you set the switches on the MB to indicate 256k
the rom will automaticly count up to 640k.  

Wim.
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