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From: chma@iceman.jcu.oz (Michael Antolovich)
Newsgroups: comp.sys.mac,comp.sys.apple2
Subject: Re: Mac Floppies
Keywords: Additional Floppies
Message-ID: <846@iceman.jcu.oz>
Date: 19 Jul 90 10:14:03 GMT
References: <11501@bsu-cs.bsu.edu> <1990Jul19.043349.4506@agate.berkeley.edu>
Organization: JCUNQ, Townsville, Qld, Australia
Lines: 35

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:
> >Hi! Need some help....
> >
> >   I am trying to connect a third floppy drive to a Mac SE/30. I am trying to
> >   use the connector from the floppy which is already connected to it externally   ...but due to some reason it would not recognise it at all....What is going wrong and to start with can it handle more than two floppies....?? Please help!!
> >
> >
> 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.  This is what differentiates between the internal and external
> or in the case of the IIGS, 2 external floppy drives.  There are 3rd party
> solutions such as the Rapport that allows floppy drives to be hooked up
> via the SCSI port but I think it's a really brain-damaged way of doing things.

	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 ?
				Just wondering,
				Michael

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