From owner-freebsd-hackers  Wed Dec  5  3: 3:51 2001
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From: "Eugene L. Vorokov" <vel@bugz.infotecs.ru>
Message-Id: <200112051103.fB5B3cv28182@bugz.infotecs.ru>
Subject: Re: offtopic: assembly
To: tlambert2@mindspring.com (Terry Lambert)
Date: Wed, 5 Dec 2001 14:03:37 +0300 (MSK)
Cc: freebsd-hackers@freebsd.org
In-Reply-To: <no.id> from "Terry Lambert" at Dec 05, 2001 12:10:08 AM
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> 
> Fabio Miranda wrote:
> > I want to understand Why each byte (8 bit of data and
> > 1 bit of parity) has one bit of parity?
> 
> To permit the hardware to catch single bit errors.
> 
> ECC is a better version of this, which permits the hardware to
> correct single bit errors, and catch multiple bit errors.

Well, AFAIK, ECC cat correct single bit errors and detect
double bit errors. Everything else is problematic, it may
or may not detect multiple bit errors, depending on
conditions.

Just my 2 cents.

Regards,
Eugene


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