Message-ID:	<34B48C54.6418@post.comstar.ru>
Date:	Thu, 08 Jan 1998 11:20:36 +0300
From:	Dim Zegebart <zager AT post DOT comstar DOT ru>
Reply-To:	zager AT post DOT comstar DOT ru
Organization:	Comstar Ltd.
MIME-Version:	1.0
To:	Christopher Macleod <aa956 AT freenet DOT hamilton DOT on DOT ca>
CC:	DJGPP Mail List <djgpp AT delorie DOT com>
Subject:	Re: Trying to install more simms.... .
References:	<68qr0v$ed0$1 AT mohawk DOT hwcn DOT org>

Christopher Macleod wrote:
> 
> --
> 
> Hope I have chosen the right place for this question......
> I have a 486 66mhz with 8 meg of ram.  I bought 4 simms of 4 meg each to
> 'boost' my ram, and can't seem to get them right.  The system still sees
> only 8 megs of memory, no matter what order I install the simms.  I have
> tried 4 new with 4 of the old, 4 new alone, and have installed them in
> different positions too.  A couple of times I was taken to Setup on bootup
> with a "memory mismatched" message but don't think that should be
> required.  I thought the post just sees the ram for itself.  Any tips or
> sharing of facts here would be greatly appreciated by this novice.
> Thanks in advance.
> Regards
> Christopher
Are yoy still have a problem ?
I have a large experience in adding and chanching SIMMS configurartion.
First, it's may be critical on such an 'old' system like yours what kind
of SIMMS are already installed and a type of new SIMMS. The most bad
thing is
what old SIMMS are 70ns speed and new are 60ns speed and your
systemboard doesn't
support both of them at the same time.
Second, as I reilised from your post, you have 8 slots for 30 pin SIMMS. 
Perhaps, you buy 30pin EDO-RAM SIMMS. May be this is a problem. Check
out your system board 
manual for supporting types of RAM.
Another potential problem is jumpers :( But I saw them only on very old
PC, so probably
this is not a couse of problem.
Also some brand named PC such as DELL, Bull or Compaq has it's own type
of SIMMs, so be care with it !
Perhaps, your system board has a 5V on SIMMS slot and new SIMMs are 3V
and vica-versa.
And the last one, you wrote -  
> A couple of times I was taken to Setup on bootup
> with a "memory mismatched" message but don't think that should be
> required.
If so, all  previous things are useless and only thing you have to do is
enter CMOS setup and exit with saving, no additional changes required.
Good luck !

-- 
Regards,
Dim Zegebart, 
Moscow Russia.
Ghostly basement : http://www.geocities.com/siliconvalley/pines/7817
DZCOMM - comm library for Allegro

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