[PDP8-Lovers] how to clean a PDP8/A, dishwasher?

From: Ben Franchuk <bfranchuk_at_jetnet.ab.ca>
Date: Sat Dec 15 23:18:12 2001

Dave McGuire wrote:
>
> On December 15, ajp166 wrote:
> > >I have a Question for the other core users out there:
> > >How would I test-signal a board, for demos, that is
> > >just a core frame, IE one sacrificed from its stack
> > >and sold at the e- flea market?
> >
> > It's a non trivial thing to do. Core by definition is destructive
> > read out memory. So to demo a core you need to provide
> > the coincident current (x,y) and the inhibit/write/read signals
> > with the associated timing. Both the currents and the
> > timing are critical. takes a lot of stuff to do that.
>
> I have some scans of an old BYTE Magazine article (July 1976 I think)
> that details how to build a common interface for an arbitrary chunk of
> core. I haven't really read it in-depth but I plan to someday. I can
> put it online if anyone would like to see it.
>
> -Dave

I think that was a design for the 8080 and the S100 bus.
It was a really nice design too if I remember right. I remember
somebody doing a core-demo on the web. I think it used a iron washer
as the core. Since this is not high speed only the current is critical
here.
(Boy do I miss the early Bytes -- ordinary people designing and using
computers
-- not multi-billion $$$ bloatware companies -- )

Ben Franchuk --- Pre-historic Cpu's --
www.jetnet.ab.ca/users/bfranchuk/index.html
Received on Sat Dec 15 2001 - 23:18:12 GMT

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