Article View: comp.sys.mac.hardware.video
Article #29Mac II video Card Upgrade Info and Query
From: Clark N. Quinn
Date: Mon, 11 Sep 1995 00:00
Date: Mon, 11 Sep 1995 00:00
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After living for years with 16 greys/colours, I finally decided to upgrade
to 256 (thank you, Realmz). Yes, this is a real Mac II, no x or anything
else (well, I got the PMMU, and thermostatically controlled fan, but not
even the SuperDrive upgrade tho' I wouldn't mind), with the original Mac
II video card, which was always designed to be upgradeable. Apple
declined on providing the upgrade, so I was on my own.
I had no luck finding the necessary chips here in Oz (8 x 41264's, which
are 24 pin dual ported video RAM), but while visiting the US I saw an ad
for a chip company that promised they would have them. Well, it took two
tries (the first time they sent the wrong chips) and some external
support, but Memory Direct (+1-714-847-5532, Fax +1-714-842-9437) finally
got them to me. I popped them in and the card works fine.
In 16 greys/colours. Hmmph.
I think what's up is that I need to signal to the card that I've added the
chips. I presume that there's a connection or resistor I need to break,
or a connection needs to be made.
One suspicion: there's a double triangle of solder that looks like just
dragging a soldering pencil tip across it would create such a join...
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Alternatively, can anyone state definitively just WHAT extra needs to be
done? Your help would be greatly appreciated. Thanks, -- Clark
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_--_|\ Dr. Clark N. Quinn
/ \ School of Computer Science and Engineering +61-2-385-3985
\_.--._* The University of New South Wales Fax +61-2-385-5995
v Sydney NSW 2052 C.Quinn@unsw.edu.au
AUSTRALIA cnquinn@cse.unsw.edu.au
"A California Yankee in the Land of Oz"
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 11065a,b27864dc9cfd8f2d,start X-Google-Attributes: gid11065a,public X-Google-Thread: 10b5e3,b27864dc9cfd8f2d,start X-Google-Attributes: gid10b5e3,public From: C.Quinn@unsw.edu.au (Clark N. Quinn) Subject: Mac II video Card Upgrade Info and Query Date: 1995/09/11 Message-ID: <C.Quinn-1109951014130001@129.94.246.116> X-Deja-AN: 109845601 organization: University of New South Wales newsgroups: comp.sys.mac.hardware.video,aus.computers.mac