Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!clyde!uunet!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!brutus.cs.uiuc.edu!psuvax1!psuvm!bhb3
From: BHB3@PSUVM.BITNET
Newsgroups: comp.sys.ibm.pc
Subject: Re: Need Info on Memory and Math Chip Speeds for 286
Message-ID: <89339.103918BHB3@PSUVM.BITNET>
Date: 5 Dec 89 15:39:18 GMT
References: <176@venice.SEDD.TRW.COM>
Distribution: usa
Organization: Penn State University
Lines: 32

In article <176@venice.SEDD.TRW.COM>, ries@venice.SEDD.TRW.COM (Marc Ries) says:
>
>   [I'd ask Packard Bell, but their phone is always busy  1/2-)]
>
>   I have a Packard Bell 6/12MH 286 Clone (the Legend V/Force 286 Model)
>   with 1MB memory, DOS 3.3.
>
>   Q1:  I would like to upgrade the 4 motherboard 256K SIMMS with
>        1MB SIMMS but don't know how fast I need the memory to
>        be (100NS? 80NS?).  The current chips didn't have any speed
>        info on them.
>
>   Q2:  The User's Manual mentions that the 80287 math co-processor
>        should be either 6 or 12 MH.  The fastest availiable at the
>        most economic cost is only running 10MH.  The only one I see
>        advertised at 12MH is the 80C287-A.  Can I use either or neither?
>
>
>--
>Marc Ries
>           ries@venice.sedd.trw.com     (ARPA)
>           somewhere!trwind!venice!ries (UUCP)
>           #include <std.disclaimer>

At 12 Mhz, you should use 100 ns parts, but I would get 80 ns, since they
cost maybe $10 more per SIMM and then you could use them in a future 386
upgrade.  Checkout California Microchip in Computer Shopper. The were


selling 1Mbitx9 SIMM's for $115.

                                                   Brent H. Besler