Designs (was Re: OT: how big would it be?)

From: CLASSICCMP_at_trailing-edge.com <(CLASSICCMP_at_trailing-edge.com)>
Date: Wed Oct 20 13:32:52 1999

>> Are they the correct technology? I like 'em because you can get to parts of
>> the circuit easily, but it is more compact to put everything on just a few
>> boards.

>Flip chips, M series and all were really dictated not by what could be put
>on a board but how many connections the bord could make. For a flip chip
>it was 18 or 36 (someone?). A 16 bit parallel load register like say a
>pair of LS573s would need 32 IO, plus power and controls. See the
>problem?
>
>Even TTL chips hit the wall in pins/functions per package.

Exactly - it's not a question of "do we have the parts?" but "Can
we connect all the parts together usefully?".

Is it true that the first CPU-on-a-single-board was the DG Nova?
(And it's a rather largish board, at that! Almost equivalent in
area to all the boards in the PDP-8/E CPU put together...)

-- 
 Tim Shoppa                        Email: shoppa_at_trailing-edge.com
 Trailing Edge Technology          WWW:   http://www.trailing-edge.com/
 7328 Bradley Blvd		   Voice: 301-767-5917
 Bethesda, MD, USA 20817           Fax:   301-767-5927
Received on Wed Oct 20 1999 - 13:32:52 BST

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