Homebuilt TTL and transistor CPUs

Brent Hilpert hilpert at cs.ubc.ca
Thu Jan 5 03:05:47 CST 2006

"Peter C. Wallace" wrote:
> Neon bulb logic?

(... there was a long thread here about this a few months back.)

> Tunnel Diode logic?

Ran into these recently in a Systron-Donner frequency counter from the 60s,
formed into a ring counter for the high-speed counting stage (first decade)
where 'high-speed' == all of 50MHz.

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