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From: hpoppe@bierstadt.scd.ucar.edu (Herb Poppe)
Newsgroups: comp.protocols.appletalk
Subject: Re: RE> Alternate AT problem
Message-ID: <5963@ncar.ucar.edu>
Date: 10 Jan 90 17:07:55 GMT
References: <Added.4Zeoq7W00Ui3Enok8F@andrew.cmu.edu>
Sender: news@ncar.ucar.edu
Organization: Scientific Computing Division/NCAR, Boulder, CO
Lines: 51

In article <Added.4Zeoq7W00Ui3Enok8F@andrew.cmu.edu% Wolfgang_Naegeli.ED_TSRS@QM01.CTD.ORNL.GOV (Wolfgang Naegeli) writes:
%
%         Reply to:   RE% Alternate AT problem
%In article <Added.4ZXXuoa00Ui3Q5K09z@andrew.cmu.edu%
%I wrote:
%#REGARDING                Alternate AT problem
%#I am experiencing a strange problem on a 512ke. When booting, a message appears
					   ^^^^^
%#on the screen saying,
%#
%#    The alternate AppleTalk driver could not be found.
%#    The built-in network will be used instead.
%#
%#The only option is to click OK.
%
%I also explained that when using the same locked startup diskette on a Mac Plus
%or Mac II there was no complaint.
%
%Thanks to all who responded with suggestions.
%
%One respondent suggested to check for network drivers.  This was unsuccessful.
%After unlocking the diskette and putting the Network CDEV onto it, selecting the
%'Built-in' option would not stick on the 512ke as it did on other Macs (i.e.,
		   ^^^^^^^^^^^^^^^
%after closing and reopening the Control Panel, it was dehighlighted again).
%
%Several suggestions centered around the hypothesis that there might be someting
%set wrong in PRAM, but zapping PRAM did not help.
	      ^^^^
%....

The following is hazy recollection; act on it at your own risk:

Although the 512KE has the 128K ROMs, it is not a MacPlus (even if it has
additional memory). The 512KE uses the same clock chip (and hence PRAM)
as the 128K and 512K Macs. Toward the end of production, some 512KE's
were produced with the MacPlus clock chip. The original clock chip
had 32 bytes of PRAM, the "MacPlus" clock chip has 256 bytes of
PRAM. If the information in question is being saved in an area of PRAM
beyond 32 bytes, and the machine in question is an "old" 512KE, then
this would account for the information not "sticking".

There is an INIT named (something like) "512KE PRAM INIT" that fools
an early 512KE into thinking it has more than 32 bytes of PRAM. I believe it
saves PRAM to disk to achieve the same effect as the real thing.
I suspect this INIT is available on sumex.stanford.edu via anonymous FTP.

--
Herb Poppe      NCAR                         INTERNET: hpoppe@ncar.ucar.edu
(303) 497-1296  P.O. Box 3000                   CSNET: hpoppe@ncar.CSNET
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