I've got a substantial number of these, if anybody wants 'em. They're
18-pins, BTW, and were customed up for the Apple-III. I've got a memory
board that uses 'em, but never got around to doing anything with it. However,
that's how I learned where the rather odd DRAMs went. There are two rows of
these guys on the board, together with a corresponding row of the 16Kx1 parts.
IIRC, the rows are two-byte-wide rows. The board's clearly marked Apple-III,
but in order to fit the intended application, I removed the connector which
fits a pair of single-in-line rows of pins onto which the board plugs,
probably toward the front of the main board. I've never looked at an
Apple-III, so I can't comment on its role with respect to system function,
i.e. it may be an expansion board, or perhaps not.
These parts are normal parts, just as labelled, but have extra nRAS and nCAS
signals with which to control the second chip on each substrate.
Dick
----- Original Message -----
From: "William Donzelli" <aw288_at_osfn.org>
To: <cctalk_at_classiccmp.org>
Sent: Friday, June 21, 2002 9:39 PM
Subject: Weird RAM
> The other weirdness to pass my eye (but managed to get) is a small
> package of chips. These are "purple" DIPs, 16 or 18 pins (can't recall
> offhand), with two LCCCs piggybacked. This method of construction is
> common in very high end memory chips and military assemblies. The LCCCs
> are Mosteks, and some are clearly labelled MK4116 with 1980-ish datecodes.
> Memory, probably, the good 'ol 16K DRAM.
>
> But the weirdness...two DRAMs on a package is pretty weird (I suppose
> making a 32Kx 1 or 16K x 2), but these things have Apple logos.
>
> Huh?
>
> William Donzelli
> aw288_at_osfn.org
>
Received on Sat Jun 22 2002 - 11:07:46 BST