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Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!munnari.oz.au!bunyip!iceman!chma
From: chma@iceman.jcu.oz (Michael Antolovich)
Newsgroups: comp.sys.mac,comp.sys.apple2
Subject: Re: Mac Floppies
Keywords: Additional Floppies
Message-ID: <851@iceman.jcu.oz>
Date: 20 Jul 90 00:43:41 GMT
References: <11501@bsu-cs.bsu.edu> <1990Jul19.043349.4506@agate.berkeley.edu> <9265@goofy.Apple.COM>
Organization: JCUNQ, Townsville, Qld, Australia
Lines: 49

In article <9265@goofy.Apple.COM>, stevec@Apple.COM (Steve Christensen) writes:
> In article <846@iceman.jcu.oz> chma@iceman.jcu.oz (Michael Antolovich) writes:
> >In article <1990Jul19.043349.4506@agate.berkeley.edu>, calvinc@sandstorm.Berkeley.EDU (Calvin Cheng) writes:
> >> In article <11501@bsu-cs.bsu.edu> ali99@bsu-cs.bsu.edu (Mohammad Ali) writes:
> >> >[stuff about trying to connect a 3rd floppy to a Mac SE/30]
> 
> >> [history of Apple disk controllers plus 3rd part solutions]
> 
> >	This may seem silly, but can't a third drive be attached to a twin
> >drive SE ?  (Isn't CMD-SHFT 0 used for ejecting the third floppy ?)  Do the
> >Twin SE's have a different scheme to the rest of the Apple line ?
> 
> Yes, but that's an SE not an SE/30.  The SE/30 is essentially a IIx in a
> different package so it's limited to 2 drives.  The SE lets you have 3 drives
> because there is an extra drive selection toggle that's used in conjunction
> with the internal drive select to let you select one of 2 internal drives.
> 
> steve

	I understand that, I was only replying to the bit that said :-

>All Macs and Apple IIs are designed around the IWM (Integrated or Incredible
>Woz Machine) and its direct descendent, the SIWM.  Both of these chips are
>only designed to work with 2 floppy drives connected.  If you examine the
>pin-out to your floppy port (nearly identical on the Apple IIs and Mac, not
>too sure about the FDHD), to you'll find that one of the lines is a drive
>select line.

	Aren't Twin Drive SE's considered part of the 'Mac and Apple II' 
line ?   (:-)
						Michael

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