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From: mrc@Tomobiki-Cho.CAC.Washington.EDU (Mark Crispin)
Newsgroups: comp.sys.next,comp.sys.mac
Subject: Re: NeXT Review;Quite a machine, but not a Mac
Message-ID: <6453@blake.acs.washington.edu>
Date: 29 Mar 90 23:09:42 GMT
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I just remembered another "feature" about the Mac, which reminds me
why I intend never again to do software development on the Mac
platform.  Like MS-DOS, the Mac operating system splits memory into
64K segment; no object may be larger than that.  So, if you need a
100,000 character string, you have to split it into chunks.

Also, there's no memory mapping, so system memory management is done
by shuffling.  The way they do this is by a bizarre system of double-
indirect pointers.  Although this is OK for memory-tight systems, it's
a lot of work for the programmer to keep track and for large memory
systems this is slower than allocating enough memory for the
application to begin with and shuffling it to a larger chunk with a
single base register than making all those double-indirect references.

I guess this was all for CP/M compatibility.  ;-)

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