Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!unmvax!nmtsun!wbnsnsr
From: wbnsnsr@nmtsun.nmt.edu (William Norris)
Newsgroups: comp.sys.ibm.pc
Subject: Re: What is different about slot 8 in an XT
Keywords: IBM PC/XT, expansion slots, bus
Message-ID: <1533@nmtsun.nmt.edu>
Date: 28 Nov 88 00:28:05 GMT
References: <3077@dalcs.UUCP>
Reply-To: wbnsnsr@nmtsun.nmt.edu (William Norris)
Distribution: na
Organization: New Mexico Tech, Socorro NM
Lines: 18

In article <3077@dalcs.UUCP> lane@dalcs.UUCP (John Wright/Dr. Pat Lane) writes:
>I've read that in an IBM PC/XT, slot 8, the one closest to the power supply
>is somehow different and certain cards will not work or must be specially
>configured to work in that slot.  I'm wondering in what way (briefly) is 
>it different from the other slots and for what purpose, and does this hold
>true for XT compatibles and "higher" machines (AT's, etc.).

Slot 8 was originally designed for IBM's expansion chassis.  A card was
inserted into slot 8 with a cable to the other box.  The difference
between slot 8 and the rest is that slot 8 has stricter timing requirements.
(120ms vs 480ms, I think.)  I would recommend not putting any cards in
this slot unless the manual states that it is OK, or there is a jumper on
the card for slot 8 (like Microsoft Bus Mouse).

-- 
wbnsnsr@nmtsun.nmt.edu                             |    /// Seulement
William B. Norris IV                               |\\ ///  l'Amiga peut 
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