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From: phil@diablo.amd.com (Phil Ngai)
Newsgroups: sci.electronics
Subject: Re: PC-AT bus
Message-ID: <27827@amdcad.AMD.COM>
Date: 20 Oct 89 22:43:57 GMT
References: <24842@andante.UUCP>
Sender: news@amdcad.AMD.COM
Reply-To: phil@diablo.AMD.COM (Phil Ngai)
Distribution: usa
Organization: Advanced Micro Devices, Inc. Sunnyvale CA
Lines: 22

In article <24842@andante.UUCP> geno@andante.UUCP (Geno Rice) writes:
|Can anyone point me to a detailed description of the PC-AT bus?
|
|I need the definitions of the various signals together with min and max
|timing specifications and set-up and hold requirements.

Sorry, there is no such document. IBM never published such numbers and
by now, there are so many different implementations that it would
probably be impossible to come up with specs which weren't violated by
a large number of machines. 

You might find the IBM patents relating to the PC interesting, Michael
Slater's Microprocessor Report sells a collection for a reasonable
price. Another interesting approach might be to view the EISA specs,
this costs a rather larger amount of money at this time. You might
think that the data sheets and app notes from companies like Chips and
Technology would tell you something about the bus, but the documents
I've seen tell you very little. 

--
Phil Ngai, phil@diablo.amd.com		{uunet,decwrl,ucbvax}!amdcad!phil
Just say NO to the "War on Drugs".