Q-Bus PDP-11 RAM Board

From: David C. Jenner <djenner_at_halcyon.com>
Date: Sun May 31 09:52:18 1998

I have NS23M (256KB) and NS23S (1MB or 4MB) boards and docs for them.
There is no mention of an NS23D. It could be like the NS23S?

Tim Shoppa wrote:
> > I got a non-DEC PDP-11/73 today minus the CPU (not a big deal, I saw the
> > CPU that had been in it, and I've got two of them). Anyway I've managed to
> > identify all of the haul of boards, except the RAM boards. I was told they
> > are 2Mb boards but the person wasn't sure. Also I'm wondering if anyone
> > has the switch settings for them.
> >
> > The board in question is labled:
> > NSC NS23D
> > It also has three jumpers near the contacts.
> It's a National Semiconductor board. But I didn't know that they
> made any as large as 2 Mbytes; the largest NatSemi Q-bus board
> that I've ever seen is only 256kbytes. Can you identify the
> memory chip type and count how many are on the board?
> Tim.
Received on Sun May 31 1998 - 09:52:18 BST

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