1mb x 1 memory chips for printers

From: Russ Blakeman <rhblake_at_bigfoot.com>
Date: Thu May 3 16:50:41 2001

So am I to assume (since I haven't dealt with loose DRAM in years) that the
HY51C4256S-C printed on the 20 pin DIP chips are 4x256, and if so anyone
have a source? I need at least 16 to pop this Laserjet III up to the full 4
mb. I don't imagine they are the same as the old 256k DRAMs in the older
PC,XT and some AT class machines...

> -----Original Message-----
> From: owner-classiccmp_at_classiccmp.org
> [mailto:owner-classiccmp_at_classiccmp.org]On Behalf Of Mike Ford
> Sent: Thursday, May 03, 2001 11:24 AM
> To: classiccmp_at_classiccmp.org
> Subject: RE: 1mb x 1 memory chips for printers
>
>
> >Does it happen to say what printers the boards are used in? I
> have a Pacific
> >Data Products board from a Laserjet III that has 2 mb worth (16 chips)
> >soldered on and two banks of 8 blank sockets to add another 2mb.
> The chips
> >are marked HY51C4256S-C and are 20 pin DIP chips/sockets.
>
> Only a handfull of them are in just static bags, and even those clearly
> have the models identified so far. Most of them are in the new retail
> package with a little booklet etc.
>
> That memory looks like 4 bit x 256k, which seems also common. When I found
> a board for my NEC Silentwriter 2 model 90, I started bidding in ernest,
> and stopped reading the other boxes. I really have no interest in the rest
> except to sell them, anybody wants a "ready to be filled
> expansion card" $5
> and shipping, 3/$10, 10/$22, etc.
>
>
Received on Thu May 03 2001 - 16:50:41 BST