Megaprocessor - built from individual transistors

David Griffith dave at
Thu Jun 25 06:16:03 CDT 2015

On June 24, 2015 1:27:56 AM PDT, Pontus Pihlgren <pontus at Update.UU.SE> wrote:
> On Wed, Jun 24, 2015 at 06:10:38AM +0000, dave at wrote:
> > On Tue, 23 Jun 2015, Phil Budne wrote:
> > 
> > >If I were going thru the trouble, I'd want build a TX-0 clone!
> > 
> > I think it would me more interesting to build a replica of a pdp-8
> > straight-eight using significantly-reduced flip chips with
> > surface-mount parts.
> > 
> This exact thing has been on my TODO-list for a while. It will
> probably 
> remain on the TODO-list for some time, but I really want to do it!
> I like to think that you could shrink the computer by, at least, a 
> factor of four. Probably smaller.
> (make the flip chips double sided and double the function of each flip
> chip).
> /P

I don't think thatt making the flip-chips double-sided will be desirable.  I want to shrink the machine and minimize any need to reengineer the backplane.  By the way, can the backplane of a straight-eight be realized as a PCB?  Replicating that component without that will suck.  
David Griffith
dave at

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