Computing from 1976
cclist at sydex.com
Mon Jan 1 14:29:43 CST 2018
On 01/01/2018 12:00 PM, Paul Koning via cctalk wrote:
> "Asychronous" does not mean the clock is skewed, it means the system operates without a clock -- instead relying either on worst case delays or on explicit completion signals. That used to be done at times. The Unibus is a classis example of an asynchronous bus, and I suppose there are others from that era. The only asynchronous computer I can think of is the Dutch ARRA 1, which is notorious for only ever executing one significant program successfully for that reason. Its successor (ARRA 2) was a conventional synchronous design.
I'm not certain, but I believe that the Philco System 2000 had parts of
the CPU that operated asynchronously. At least that's what my failing
wetware seems to indicate.
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