Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!mailrus!cornell!rochester!ritcv!cci632!ccicpg!billm
From: billm@ccicpg.UUCP (Morita Bill)
Newsgroups: comp.sys.ibm.pc
Subject: IBM-XT Floppy upgrade
Summary: HELP!
Keywords: IBM-XT Floppy
Message-ID: <19592@ccicpg.UUCP>
Date: 12 Aug 88 05:04:59 GMT
Reply-To: billm@ccicpg.UUCP (Morita Bill)
Organization: CCI CPG, Irvine CA
Lines: 23
References:


	I am having trouble converting an old IBM-XT from a configuration
	of a single floppy (360k) and a single hard disk (20 Mb).  The 
	configuration I originally had worked fine until the full height
	IBM floppy drive died.  I replaced it with two Tandon half-height
	floppies (model 50-2).  The floppy controller is some unknown
	manufacture (I can't find any markings on the board).  The cable
	is the type with the "half-twist".  I have terminated things
	according to the instructions recieved with the drives.

	The problem is this: Only ONE drive will work, e.g. the first drive
	(the "a:" drive).  Both floppy drives function correctly when placed
	in the "a" drive position on the cable.  The cable checks out
	in that I can plug it in swapped end-for-end and the "a" drive
	functions correctly.  The only conclusion I can come to is that
	there must be some hardware change necessary.  Like a DIP switch
	on the floppy controller or the mother board.  None of the software
	can "see" the second drive.  Maybe I need a new BIOS ROM???

	Any help that anyone can give me would be much appreciated.
	Thanks (in advance)

			Bill Morita