Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!usc!apple!dlyons
From: dlyons@Apple.COM (David A. Lyons)
Newsgroups: comp.sys.apple2
Subject: Re: Ejecting disks on a Unidisk 3.5
Message-ID: <51009@apple.Apple.COM>
Date: 1 Apr 91 06:16:09 GMT
References: <1991Mar29.151823.8462@umiami.ir.miami.edu>
Organization: Apple Computer Inc., Cupertino, CA
Lines: 28

In article <1991Mar29.151823.8462@umiami.ir.miami.edu> jdeitch@umiami.ir.miami.edu (Jonathan Deitch) writes:
>Anyone know how to make a Unidisk 3.5" drive on an Apple //c eject the disk
>from software ?
>
>I'd be interested mainly in doing this from machine language, so if anyone
>can send me source code (it shouldn't be long) I'd be a happy camper.
>- Jonathan 
>------------------------------------------------------------------------------
>Internet : jdeitch@umiami.miami.edu               | "Good musicians execute
>------------------------------------------------- |  their music but bad ones

You need to make a SmartPort "Control" call to the right slot and unit
number; reference material includes the Apple IIgs Firmware Reference
Manual and the Apple II SmartPort Technical Notes.

Be careful doing an Eject through SmartPort under ProDOS 8--you should make
sure you're -not- talking to a pre-revision-C SCSI card, or make sure that
you -are- talking to a 3.5" drive.  The Eject subcall was originally defined
only for 3.5 drives, and to an *old* SCSI card it meant "Format"!  (If your
software works ONLY on an Apple IIc Plus, that isn't a problem.)
-- 
David A. Lyons, Apple Computer, Inc.      |   DAL Systems
Apple II System Software Engineer         |   P.O. Box 875
America Online: Dave Lyons                |   Cupertino, CA 95015-0875
GEnie: D.LYONS2 or DAVE.LYONS         CompuServe: 72177,3233
Internet/BITNET:  dlyons@apple.com    UUCP:  ...!ames!apple!dlyons
   
My opinions are my own, not Apple's.