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From: scherer@dtrc.dt.navy.mil (Scherer)
Newsgroups: comp.sys.ibm.pc
Subject: Re: AT&T PC6300-compatible hard disk
Message-ID: <1075@nems.dt.navy.mil>
Date: 22 Feb 90 03:21:22 GMT
References: <2587@intvax.UUCP>
Sender: news@nems.dt.navy.mil
Reply-To: scherer@dtrc.dt.navy.mil (Doug Scherer)
Organization: David Taylor Research Center, Bethesda, MD
Lines: 22

In article <2587@intvax.UUCP> novak@intvax.UUCP (James L. Novak) writes:
>A good friend has an early AT&T PC6300 (XT-clone) and wants to finally
>join the real world and add a hard drive.  The problem is that everyone
>he calls (mail order places) won't guarantee that an add-on drive/adapter
>will work.  I know I used such a machine with a hard drive in school, but
>don't remember anything about incompatibility problems.  Can anyone
>enlighten me about problems and controllers/disks that will work.  Give it
>to me techincal-I can translate for my MBA friend.
    James,
	Western digital XT disk card (WD1004A WX1) and I believe XTGEN
are not compatible with the main ROM Bios in AT&T 6300 and AT&T 6300T 
machines but can be altered to work.  To make it compatible you need 
to disable the Bios on the disk controller by placing jumper resistor 
at R23 and check that integrated circuits U7 and U8 are NOT installed.  
When you do a low level format follow the directions AT&T gives you 
not the western digital as the controller will no longer respond to 
DEBUG.

    I got this info from a Western Digital Tech. manual and have not
tried this myself.

    If anyone else hasaanymore input please post.