On 10/27/2017 12:28 PM, Paul Koning via cctalk wrote:
  It helps to have a machine built with sane design
principles.  Things like RS flops that don't have both inputs active at the same time.
And a properly clocked architecture.  Neither of these properties holds for the CDC
6600...
        paul 
But you can still get TTL for the common stuff,and PAL/GAL chips as
well, so nothing is preventing you from doing the common logic of
the 1965 to 1985 era, if it not for production use.
Ben.