[time-nuts] Thought experiment on a low cost timing board
Poul-Henning Kamp
phk at phk.freebsd.dk
Sun Feb 26 07:53:47 UTC 2006
In message <20060225214939.E9789BDE0 at ip-64-139-1-69.sjc.megapath.net>, Hal Murray writes:
>One of the things I was thinking about putting in the FPGA was a pair of 32
>bit counters for implementing the unix date/time directly.
You don't even need 32bits for that:
http://phk.freebsd.dk/pubs/timecounter.pdf
And doing it in hardware would be more expensive than in software, hardware
access is much slower than memory access.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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