From: dseelema@zeus.UWaterloo.ca (Alek Seelemann) Subject: Re: Info on Cyrix 386DX/387 compatibles Date: Mon, 12 Apr 1993 23:21:28 GMT
In article <9304092309.AA20195@idsun5.id.dth.dk> kaihp@id.dth.dk (Kai
Harrekilde-Petersen (Student)) writes:
>
> Several have asked for info about Cyrix 486DLC and 83D87 (ie:
Cyrix' 387
> clone); you all get the this answer (I'm being lazy)
>
> 486DLC:
> The DLC is 'plug-and-play' compatible; and runs (roughly) 50 to 100
%
> faster than the Intel 386 part. This is mainly because of the
internal
> cache; if you disable the cache, it's obly about 10% faster than
the
> intel chip. I to measure the differense when using Norton System
Info,
> and the result says that the machine is 11.4 x a PC/XT without the
> cache, and 19.8 (and even 39.4) times faster than a PC/XT when the
> cache is enabled (at two different settings). However, /don't/
expect
> this improvement, when running a real program. The benchmark loop
in
> Norton SysInfo is probably so small (and simple-minded) that it can
> be entirely in the cache!
> The DLC _does not_ contain an FPU - you have to buy a 387/83D87
> seperately.
>
> 83D87:
> It been benchmarked in PC Week (Labs), in august 27, 1990, and
was
> ``Top Rated'' - It's faster than the Intel 387 and IIT's 387 clone
> (3C87 ?). Also, it beats the 486DX FPU part, on most operations
(slower
> on fadd and fmul, I think), and the Weitek 486 coprocessor (4167 ?)
on ALL
> trancendental functions.
>
> How to get it:
> I bought my DLC through a friend (used 1 month), price: 600 Dkr
(around
> US$100).The price for a new DLC will probably be around $200.
> I know that PRC Components (In Denmark) sells it, but they
probably
> won't sell it to you (they only sell stuff to companies). Try to
look
> through the local `yellow pages' for representatives for Cyrix;
phone some
> companies and ask them about who has the local agency for Cyrix.
This usually
> works for me, when I'm trying to find an agent.
>
> I hope this answered all the questions raised (otherwise you'll
tell/yell
> me, for sure!)
>
> Regards from,
> Kai
Does Linux check for a DLC/SLC and start up the cache?
E-mail replies please.
Alek