Message-ID:	<323466B8.7D58@tempe.vlsi.com>
Date:	Mon, 09 Sep 1996 11:49:28 -0700
From:	Charles Marslett <charles DOT marslett AT tempe DOT vlsi DOT com>
Organization:	VLSI Technology, Inc.
MIME-Version:	1.0
To:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>, djgpp-workers AT delorie DOT com
Subject:	Re: `sync' on MSDOS
References:	<Pine DOT SUN DOT 3 DOT 91 DOT 960909192156 DOT 8698D-100000 AT is>

Eli Zaretskii wrote:
....
> So: does anybody know a simple way to cause *any* cache to flush itself?
> Here is what I know:
> 
>         1) Windows 95 has a function (710Dh) to do that.
>         2) SmartDrv has also such a function.
>         3) Any other cache has such function also, but it's impossible to
> call them all.
> 
> I suspect that making an Int 13h call (e.g., seek to track 0, or disk
> reset) will also flush the cache, but does anybody know for sure?
> 
> Any other piece of info is welcome.  Thanks.

I remember a discussion about this in Geoff Chappell's book "DOS Internals."
I have it at home, and I'll check to see what sort of conclusion he came up
with (unless someone beats me to the punch).  I think the answer is that there
is a simple solution for any system that will run Windows 3.x reliably, and
that, along with the Win95 function, should address the vast majority of
cache environments.

--Charles

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