Strange i-con Unibus (?) board

[Sean Caron]

Hey, interesting, those are almost identical. Yeah, I'm not sure "hybrid"
was really the correct term, maybe MCM? I see a couple components attached
to a piece of ceramic and I want to call it a hybrid... probably have been
looking at too many RF component databooks recently, LOL.

Thanks for noticing the similarity and posting... I guess those modules are
almost certainly some kind of memory? It's just such an unusual packaging
scheme for it.

Best,

Sean


On Mon, Dec 8, 2014 at 4:09 AM, Pontus Pihlgren <pontus at update.uu.se> wrote:

> On Fri, Dec 05, 2014 at 06:03:35PM -0500, Sean Caron wrote:
> >
> >
> http://www.ebay.com/itm/Vintage-Computer-Memory-Digital-DEC-logo-1216988-board-from-PDP-11-or-VAX-/261685664915
> >
> > I'm really curious what all those SIP hybrids are running down the one
> side
> > of the board. I see it's got no less than 8 74181 ALUs so I figure this
> has
> > got to be some kind of processor?
>
> I looked at a picture of an MXV11 board today and I noticed similar, but
> not identical, SIP hybrids (as you call them):
>
> http://www.cosam.org/images/pdp11-23/mxv11-b.jpg
>
> Perhaps a clue.
>
> /P
>