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From: warwick@oak.math.ucla.edu (Warwick Daw)
Newsgroups: comp.sys.mac
Subject: Maximum Memory (was Re: A/UX 2.0: Truly Amazing)
Message-ID: <2670@sunset.MATH.UCLA.EDU>
Date: 2 May 90 16:45:47 GMT
References: <1575@mountn.dec.com> <7965@goofy.Apple.COM> <12460@wpi.wpi.edu> <7997@goofy.Apple.COM>
Sender: news@MATH.UCLA.EDU
Reply-To: warwick@math.ucla.edu (Warwick Daw)
Organization: UCLA Mathematics Department
Lines: 18

In article <7997@goofy.Apple.COM> dwb@sticks.apple.com (David Berry) writes:
>	When the MacOS is run in 24-bit mode (currently the default) the ROM
>	starts at 8 Meg and the slots at 9 Meg.  Thus, you are limited to 8
>	Meg of memory.  Since A/UX runs the MacOS in 32-bit mode, the lowest
>	non-ram address is the ROM at 0x40800000.  At least in theory we could
>	create a mac with as much as 4 gazillion bytes of memory.  Currently
>	we have a limit of 16 meg.

This raises a question I had thought I had found the answer to yesterday.
According to my owner's manual, the II's and the SE/30 can have up to
128MB installed in them (when 16MB simms become available). Now, if I were
to install 16MB simms (or the available 4MB simms), could I get the MacOS
to recognize the additional memory?
 
The question is purely hypothetical for me, since I don't even have the
spare cash to get four 1MB simms right now. I'm just curious.

Warwick Daw (warwick@math.ucla.edu)