Message-ID: <1336@hao.UUCP>
Date: Mon, 14-Jan-85 23:19:35 EST
Article-I.D.: hao.1336
Posted: Mon Jan 14 23:19:35 1985
Date-Received: Thu, 17-Jan-85 03:45:08 EST
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Xref: watmath net.micro.mac:342 net.micro.apple:1579

<>

I am helping to design upgrades for the macintosh.  The lowest
level upgrade is for 1M byte.  That hopefully will cost only
about $1000 or less.  The 1 meg board will go inside of the mac,
and the mac will look no different from the outside.  However,
it will have 1 meg of memory plus the memory that the mac already
had (1.5 meg total if you had a 512K mac) that runs twice as
fast as the regular mac ram because it is DMA.  We have designed
boards going up to 8 meg.  We have implemented our design up
to the 4 meg level.  Here is what we are planning to do:  You
can buy the 1 meg upgrade, and it will be internal with a connector
that is invisible from the outside of the mac (like the interrupt
and reset switches) on the bottom right vents.  If you connect
the card-cage that we are designing to the connector, you can
add several additional things... more memory, a color board we
have designed, a speedup board, and some others...  The card
cage has a case like the mac's, and it fits snugly under the
mac, adding 5 inches to the mac's height, and no inches to it's
footprint.

The question:  Is this what you guys in netland really want?
Do you have any questions or suggestions?
Please let me know, because we are really doing this to make
the macintosh a REALLY serious machine.  Since our product will
be compatible with the hyper drive, and any other hard drives,
the mac can become sort of like a mini-computer.  Imagine 8 Meg
of ram and a 192 meg hard drive...

		Dave Kliman
		70 Glen Cove Drive
		Glen Head, NY  11545
		(516) 671-1301
		to be found somewhere near sjuvax!drexel!dave
					   presby!drexel!dave


-- 

Michael Ward, NCAR/SCD
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Message-ID: <20980069@cmu-cs-k.ARPA>
Date: Tue, 15-Jan-85 18:45:26 EST
Article-I.D.: cmu-cs-k.20980069
Posted: Tue Jan 15 18:45:26 1985
Date-Received: Fri, 18-Jan-85 01:43:02 EST
References: <1336@hao.UUCP>
Organization: Carnegie-Mellon University, CS/RI
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Xref: watmath net.micro.mac:354 net.micro.apple:1583

Those sound like very worthwhile upgrades.  What I would really like to see
more than anything else is virtual memory, though.  You could put a memory
management chip on the memory expansion boards, or replace the 68000 with a
line to a board containing a 68000 with memory management.  Probably the
former would be preferable.  This would enable the Mac to run 4.2bsd,
although the porting effort would be significant.  If it could be done under
$2000, you would have a guaranteed market here at C-MU, since all students
will soon be required to obtain a cheap 4.2bsd workstation (which one is
under discussion) to hook up to the VICE network in early 1986.
-=-
Tim Maroney, Carnegie-Mellon University Computation Center
ARPA:	Tim.Maroney@CMU-CS-K	uucp:	seismo!cmu-cs-k!tim
CompuServe:	74176,1360	audio:	shout "Hey, Tim!"

"Remember all ye that existence is pure joy; that all the sorrows are
but as shadows; they pass & are done; but there is that which remains."
Liber AL, II:9.

Message-ID: <1030002@acf4.UUCP>
Date: Wed, 16-Jan-85 10:31:00 EST
Article-I.D.: acf4.1030002
Posted: Wed Jan 16 10:31:00 1985
Date-Received: Sun, 20-Jan-85 01:35:42 EST
References: <1336@hao.UUCP>
Organization: New York University
Lines: 14

Dave,

How are you going to get around the memory map problem?  I.e., the fact 
that the Macintoshes memory map wraps around the address space every 512K??

Also, how are you going to get the memory manager and the segment manager to
handle that much memory?

All the other stuff sounds neet, tell me more!!!

				David HM Spector
				NYU/acf Systems Group
				Arpa: Spector@nyu-cmcl1.ARPA
				UUCP: ...!allegra!cmcl2!cmcl1!spector