From owner-freebsd-hackers Mon Nov 3 06:01:58 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id GAA03777 for hackers-outgoing; Mon, 3 Nov 1997 06:01:58 -0800 (PST) (envelope-from owner-freebsd-hackers) Received: from terra.Sarnoff.COM (terra.sarnoff.com [130.33.11.203]) by hub.freebsd.org (8.8.7/8.8.7) with SMTP id GAA03770 for ; Mon, 3 Nov 1997 06:01:54 -0800 (PST) (envelope-from rminnich@Sarnoff.COM) Received: (from rminnich@localhost) by terra.Sarnoff.COM (8.6.12/8.6.12) id JAA03069; Mon, 3 Nov 1997 09:00:02 -0500 Date: Mon, 3 Nov 1997 09:00:01 -0500 (EST) From: "Ron G. Minnich" X-Sender: rminnich@terra To: "Jamil J. Weatherbee" cc: =?iso-8859-1?Q?=DEor=F0ur?= Ivarsson , hackers@FreeBSD.ORG Subject: Re: 7400 gates effected by probe routine In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk On Sat, 1 Nov 1997, Jamil J. Weatherbee wrote: > > Ah... Thanks, What your'e talking about a 7401 (open collector nor) or a > 7405 (open collector nand) (TTL Cookbook pg. 137), unfortunately I don't > have a choice with this > so I probably will just forget the probe routines. well, open collector have no issues with one "high" and one low, since open collector by design don't drive high, they just are open. There's no issue. Don't worry about it. use your probe routines. open collector was designed for wired-or. ron