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 POB #2185 C/S | \\// vous l'offrir. Socorro, NM 87801 |=-=-=-=-=-=-=-=-=-=-=-=-=