From owner-freebsd-hackers Sun Oct 27 19: 9:51 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7A2AB37B401 for ; Sun, 27 Oct 2002 19:09:50 -0800 (PST) Received: from blackbox.yayproductions.com (h-66-166-17-53.SNVACAID.covad.net [66.166.17.53]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0AD8B43E77 for ; Sun, 27 Oct 2002 19:09:50 -0800 (PST) (envelope-from davek@saturn5.com) Received: from localhost (davek@localhost) by blackbox.yayproductions.com (8.11.6/8.11.3) with ESMTP id g9S33Yk01236; Sun, 27 Oct 2002 19:03:34 -0800 (PST) (envelope-from davek@saturn5.com) X-Authentication-Warning: blackbox.yayproductions.com: davek owned process doing -bs Date: Sun, 27 Oct 2002 19:03:34 -0800 (PST) From: David Nicholas Kayal X-X-Sender: davek@blackbox.yayproductions.com To: gkshenaut@ucdavis.edu Cc: hackers@FreeBSD.ORG Subject: Re: Programming the Parallel Port using ppi. In-Reply-To: <200210280155.g9S1tiQ69311@thistle.bogs.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Shouldn't 0xff result in 5v outputs? On Sun, 27 Oct 2002, Greg Shenaut wrote: > In message , David Nicholas Kayal cleopede: > > val = 0xff; > > For this kind of testing, it is sometimes useful to use a value > like 0xaa or 0x55, and probe the adjacent lines--don't forget that > if there is inversion going on, 0xff will produce all 0v outputs. > Just a random thought, it may not help here, but aa/ff are generally > more useful than all 1's or all 0's. > > Greg Shenaut > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message