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From: russotto@eng.umd.edu (Matthew T. Russotto)
Newsgroups: comp.sys.apple2
Subject: Re: Some observations
Message-ID: <1990Nov18.055905.7325@eng.umd.edu>
Date: 18 Nov 90 05:59:05 GMT
References: <2652@ttardis.UUCP> <1990Nov16.160414.10965@ee.rochester.edu>
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In article <1990Nov16.160414.10965@ee.rochester.edu> seah@ee.rochester.edu (David Seah) writes:
>
>Just a simple question about the checksums...is this an anti-clone
>precaution or the way that GS/OS determines what revision ROM you
>have?  Neither? Both my rationalizations seem unlikely.

I suspect it is just a simple quality control measure-- when you are mass
producing ROMS, you are bound to get a few bad ones, and it is best to know
before you have put them on the circuit board.  
As an anti-clone measure, it would fail-- I understand that there are
algorithms out there that let you figure out how to make a given CRC come
out right, and checksums are trivial.
--
Matthew T. Russotto	russotto@eng.umd.edu	russotto@wam.umd.edu
     .sig under construction, like the rest of this campus.