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From: morse@currituck.cs.unc.edu (Bryan Morse)
Newsgroups: comp.sys.mac.system
Subject: Re: ROM System Disk...now where have I seen that before ?
Message-ID: <17264@thorin.cs.unc.edu>
Date: 3 Nov 90 14:34:52 GMT
References: <10123@ur-cc.UUCP> <1990Oct30.231717.29002@hoss.unl.edu> <1990Nov2.165421.3985@and.cs.liv.ac.uk>
Sender: news@thorin.cs.unc.edu
Reply-To: morse@currituck.cs.unc.edu (Bryan Morse)
Organization: University Of North Carolina, Chapel Hill
Lines: 22

>> For one, how could they fit an entire, decent,
>> bootable system file in only 357k?
 
>Poor old 128K Mac owners only had 400K floppies remember :-)

A possible way to fit in an entire system is to remember that later system
releases include updates and fixes to previous ROM versions.  Since you
know that isn't needed on brand new ROMS (ie, Classic) you can cut a lot
of that out of your ROM disk System.  My guess is that that is part of
what Apple did.

1. Can anyone verify/refute this?

2. What is the size of the ROM disk System?

3. Anyone try copying the System file from the Classic ROM disk to a Plus 
and see if everything works correctly?  It may not act the same.

Just my $0.02...

Bryan Morse                University of North Carolina at Chapel Hill
morse@cs.unc.edu           Department of Computer Science