Build your own PDP-8!

From: Doug Jackson <doug_jackson_at_citadel.com.au>
Date: Sun Nov 3 16:51:00 2002

Bob,

If it's not too late, I would like to sign up for a PBC and CPU chip as
well.

regards



Doug Jackson
Director, Managed Security Services
Citadel Securix

+61 (0)2 6290 9011 (Ph)
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Web: <www.citadel.com.au>
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> -----Original Message-----
> From: bob_at_jfcl.com [mailto:bob_at_jfcl.com]
> Sent: Saturday, November 02, 2002 2:55 AM
> To: classiccmp_at_classiccmp.org
> Subject: Re: Build your own PDP-8!
>
>
>
> In about twenty four hours eleven people have signed up for
> 13 PC boards.
> This is far more than I ever expected, and I'm glad to see so
> many people
> interested in PDP-8s and the SBC6120. I plan to keep taking
> sign ups until
> Monday, or we get to 20, which ever is first.
>
> BTW, the number of people signed up for our cooperative so
> far is enough
> to guarantee a PCB price somewhere in the low $30 range.
>
> Thanks again,
> Bob Armstrong
>
> > If you're one of those people who wants a PDP-8 but can't
> find one, don't
> >despair - you can always build your own! The SBC6120 is a
> complete PDP-8
> >built around the venerable Harris HM6120 CPU and modern
> programmable logic
> >devices. All parts used except the 6120 are contemporary,
> easily available
> >devices.
> >
> > The entire system fits on a PC board 6.2" by 4.2" and has
> approximately the
> >same footprint as a 3.5" hard disk. The SBC6120 has an IDE
> disk interface,
> >an optional 2Mb non-volatile RAM disk (that's as big as an
> RK05!), and a true
> >KL8/E compatible console terminal interface. OS/8 device
> handlers are
> >available for the IDE and RAM disks, and the system will run standard
> >OS/8 V3D. There's even an expansion bus so you can design
> and build your
> >own daughter cards to plug into it.
> >
> > To find out more, visit the SBC6120 web page at
> >
> > http://www.SpareTimeGizmos.com/Hardware/SBC6120-2.htm
> >
> > I've recently had two requests to buy SBC6120 PC boards.
> These are four
> >layer boards with plated holes and are quite expensive in
> quantity one or two,
> >but the price falls per piece falls dramatically for
> quantities as small as
> >four or six. I'd like to find a few other people who would
> be interested in
> >building their own SBC6120 and going in together on a PCB
> order. The price
> >for a SBC6120 PC board would be something like:
> >
> > Two boards ==> $100 per board
> > Four " ==> $60 per board
> > Six " ==> $45 per board
> > Ten " ==> $36 per board
> >
> > I also have about four spare 6120 chips, which I'm willing
> to sell at my
> >cost of $50 each. Believe it or not, it is still possible
> to buy new old
> >stock 6120s, at $50 each, with a minimum order of ten (!!),
> but if enough
> >people want SBC6120s we could always go this route.
> >
> > If you're interested, please write to me at bob_at_jfcl.com.
> >
> >Bob Armstrong
>


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