expanding PDP-8 memory (was Re: Finally got a "straight" DF32 yesterday)

From: Ethan Dicks <ethan_dicks_at_yahoo.com>
Date: Fri Nov 5 07:16:36 1999

--- John B <dylanb_at_sympatico.ca> wrote:
> >--- Mike Ford <mikeford_at_socal.rr.com> wrote:
> >> >More Paper tape software...
> If the paper tapes have anything PDP 8 on them I can send you a copy. I have
> the PDP-8/S already hooked up to my PC (positive level converters ;-) )

> One other thing.... you mentioned you wanted to add more memory to one of
> your straight 8s.

Not quite. I have no interest in adding more memory to the Straight 8s. I
was contemplating either replacing a core stack in an -8/L with battery-
backed CMOS static RAM to free up a core stack for my -8/i, or adding 28K of
CMOS static RAM to the -8/i. This is all to be able to run OS/8. I know
the Disk Monitor will run in 4K.

> I have two studies done by the McMaster University on
> building core memory expanders for the 8,8/s using straight 8 memory (8/s,8
> used the same kinds) and some flip chips.


> You might want to kill one of your straight 8s for the memory...

> A straight-8 still isn't worth as much whole as it is in parts.. Ugh..

I'm not completely convinced about that. I might be, but as the "first 8",
there's a certain aura that goes with it.

> You might want to think about doing that as it is nice to keep the same
> boards/technology in a transistor computer like that.

I have every interest in keeping the technology "pure". It's the M-series
-8s that I'm considering polluting with modern parts.


Infinet has been sold. The domain is going away in February.
Please send all replies to

Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com
Received on Fri Nov 05 1999 - 07:16:36 GMT

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:32:28 BST