Memory question

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4 total messages Started by Glo Sun, 21 Apr 1991 04:55

#595

Author: Glo
Date: Sun, 21 Apr 1991 04:55

13 lines
875 bytes

I have a Zenith-248 computer which is at 512k.  There are no chip slots to
increase the memory to 640k.  Is there anyway I can expand it to 640k
just by adding/soldering chips?

Also, is there anyway I could increase the speed of the computer from
8 mhz to 12,16 or 20 Mhz? Will this have a dramatic effect on the wait
state which is currently 0.  The current RAM chip speed is 100 ns.

Thanks in advance,

-Chris Shikashio

Addr: shikascs@clutx.clarkson.edu

Re: Memory question

#597

Author: Rocco Calderone
Date: Mon, 22 Apr 1991 20:31

26 lines
1432 bytes

shikascs@clutx.clarkson.edu (Glo) writes:

> I have a Zenith-248 computer which is at 512k.  There are no chip slots to
> increase the memory to 640k.  Is there anyway I can expand it to 640k
> just by adding/soldering chips?
> 
> Also, is there anyway I could increase the speed of the computer from
> 8 mhz to 12,16 or 20 Mhz? Will this have a dramatic effect on the wait
> state which is currently 0.  The current RAM chip speed is 100 ns.
> 
> Thanks in advance,
> 
> -Chris Shikashio
> 
> Addr: shikascs@clutx.clarkson.edu

  Zenith sells additional memory boards to allow to fill to 640K




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Re: Memory question

#598

Author: Dan Mandell
Date: Tue, 23 Apr 1991 01:19

7 lines
959 bytes

I'd strongly recommend you look into the Boca Ram Board (PC Connection carries
them) for the Zenith 248's that max out with 512K on system board.  We used 
the Boca Ram Board to give us 2.5 Mb that can be partitioned into EMS, Extended
and can backfill to bring the system Ram up to 640K.  We've used them with 
no difficulties.  The Zenith memory board to top off your memory at 640K
is expensive and relatively useless.  
Dan

Re: Memory question and speed

#600

Author: Kevin Maher
Date: Wed, 24 Apr 1991 00:43

20 lines
1221 bytes

In article <1991Apr21.045536.5657@grape.ecs.clarkson.edu>,
shikascs@clutx.clarkson.edu (Glo) says:
>
>Also, is there anyway I could increase the speed of the computer from
>8 mhz to 12,16 or 20 Mhz? Will this have a dramatic effect on the wait
>state which is currently 0.  The current RAM chip speed is 100 ns.
>
>Thanks in advance,
>
>-Chris Shikashio


Well, about 2 months ago, I posted this very same question. My question
was... can I simply replace the i286 chip with a 10 or 12 Mhz version?
I know where I can get those chips for damn cheap prices and it'd be the
easiest way I know to get the speed up to reasonable levels.  Does anybody
know or have a friend who would know whether this is feasible?


Any input is appreciated.

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