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From: Paul Rubin <no.email@nospam.invalid>
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Subject: Re: OKAD?
Date: Mon, 22 Aug 2016 15:31:34 -0700
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Mux <Yvo.Zoer@gmail.com> writes:
> Is there any documentation / video on how Chuck used OKAD to design
> his chips? Particularly interested in how he did the routing and what
> not..

It's hand layout, tiles with gates and circuits and hand routing between
them, comparable to various 1980s tools.

    https://www.youtube.com/results?search_query=okad+forth

finds a few videos that I haven't watched, but there are also some web
pages that describe it.