Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!ucsd!ucbvax!WUVMD.WUSTL.EDU!C08926RC
From: C08926RC@WUVMD.WUSTL.EDU (Rob Caton)
Newsgroups: comp.sys.misc
Subject: IBM PC-XT RAM Chips?
Message-ID: <9011010808.AA05178@ucbvax.Berkeley.EDU>
Date: 31 Oct 90 21:04:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 21

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 reason I ask the list is because a local service tech told me that
all true IBM XT boards have 128k soldered on board and 3 empty banks
which used 128k piggyback chips to give a total of 512k.  He also said
that the board probably had 256 - 64k written on it instead of the above -
he didnt see the board.  The board I have has 4 empty banks and no soldered
memory.

Thanks for any help!

|==================================================================|
|        Rob Caton        |                      |  Disclaimer:    |
|   Programmer/Analyst    |  "I live with danger |     What?       |
|  Washington University  |   everyday, J. R.,   |   Me worry?     |
|-------------------------|   but occasionally I |-----------------|
|     C08926RC@WUVMD      |   leave her and go hunting."--GABI     |
|==================================================================|