From owner-freebsd-hackers  Tue Aug  1 13:41:27 2000
Delivered-To: freebsd-hackers@freebsd.org
Received: from rover.village.org (rover.village.org [204.144.255.49])
	by hub.freebsd.org (Postfix) with ESMTP
	id 36B6A37BAFE; Tue,  1 Aug 2000 13:41:23 -0700 (PDT)
	(envelope-from imp@harmony.village.org)
Received: from harmony.village.org (harmony.village.org [10.0.0.6])
	by rover.village.org (8.9.3/8.9.3) with ESMTP id OAA60683;
	Tue, 1 Aug 2000 14:41:21 -0600 (MDT)
	(envelope-from imp@harmony.village.org)
Received: from harmony.village.org (localhost.village.org [127.0.0.1]) by harmony.village.org (8.9.3/8.8.3) with ESMTP id OAA85828; Tue, 1 Aug 2000 14:41:04 -0600 (MDT)
Message-Id: <200008012041.OAA85828@harmony.village.org>
To: Poul-Henning Kamp <phk@FreeBSD.ORG>
Subject: Re: How to make *real* random bits. 
Cc: hackers@FreeBSD.ORG
In-reply-to: Your message of "Mon, 31 Jul 2000 22:01:01 +0200."
		<5924.965073661@critter.freebsd.dk> 
References: <5924.965073661@critter.freebsd.dk>  
Date: Tue, 01 Aug 2000 14:41:04 -0600
From: Warner Losh <imp@village.org>
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

In message <5924.965073661@critter.freebsd.dk> Poul-Henning Kamp writes:
: The earphone output of the geiger counter with a 1kOhm load generates
: a nice TTL level pulse which can be fed onto pin 10 of the parallel
: port and timestamped with the PPS-API device ("device pps").

How does the variable, but somewhat predictable, latency of the
parallel port interface interrupt?

Warner


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message