Xref: utzoo comp.sys.mac.programmer:1358 comp.sys.mac:17409
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From: herbw@midas.TEK.COM (Herb Weiner)
Newsgroups: comp.sys.mac.programmer,comp.sys.mac
Subject: Re: system 6.0 upgrade problem
Summary: Some insight into the problem with CMS drives
Keywords: system 6.0 upgrade boot cms
Message-ID: <3064@midas.TEK.COM>
Date: 22 Jun 88 00:04:03 GMT
References: <912@parcvax.Xerox.COM> <12376@apple.Apple.COM> <2420@cxsea.UUCP> <914@parcvax.Xerox.COM>
Reply-To: herbw@midas.UUCP (Herb Weiner)
Organization: Tektronix, Inc., Beaverton, OR.
Lines: 20

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Several people have commented that they are having problems upgrading their
CMS 80 MB drives to System 6.0.  (I have *not* yet upgraded mine.  I'll wait
for Apple to fix some of the problems first...)  The symptoms described (the
drive hangs after displaying "Welcome to Macintosh" sound a lot like the
problem I had when I first installed our drives.  This is what I found:

CMS 80 MB drives *do not work* with AutoBlack, that marvelous little screen
saver that gets named MacsBug and uses the alternate screen buffer in the
Mac Plus.  The drive hangs *exactly* the same way (after displaying "Welcom
to Macintosh").

My theory: The driver for the CMS drives was not correctly written, and thus
is somehow dependent upon the memory layout in the machine.  This changed
with System 6.0, and the CMS driver broke.  CMS, shame on you!

                                 Herb Weiner
                                 UUCP: !tektronix!midas!herbw
                                 AppleLink: D0521