Re: DMA on PC motherboards

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Article #1227

#1227

From: Darryl Okahata
Date: Fri, 11 Dec 1992 18:35

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Bohdan Tashchuk (zeke@fasttech.com) wrote:

> To a first approximation, you get what you pay for. If you buy the cheapest
> Tiawanese clone you can find, you deserve to have it fail bus mastering.

     I don't know if using cheap motherboards is the problem, but I
agree with the above quote.  I've been using a high-quality (read:
expensive) AMI motherboard -- where the ENTIRE motherboard, and not the
just BIOS, is made by AMI -- and I haven't had any DMA hardware problems
with my Adaptec 1542A.  I have had problems when multiple DMA bus
masters try to access the bus (causes memory refresh starvation,
resulting in parity errors), but this is a problem with the PC
architecture.

     -- Darryl Okahata
	Internet: darrylo@sr.hp.com

DISCLAIMER: this message is the author's personal opinion and does not
constitute the support, opinion or policy of Hewlett-Packard or of the
little green men that have been following him all day.

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References: <1992Dec11.051823.3702@fasttech.com>

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From: darrylo@hpsrdmo.sr.hp.com (Darryl Okahata)
Subject: Re: DMA on PC motherboards
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Message-ID: <Bz3yB0.MC8@srgenprp.sr.hp.com>
Date: Fri, 11 Dec 1992 18:35:23 GMT
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References: <1992Dec11.051823.3702@fasttech.com>
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