From owner-freebsd-chat Thu May 3 11:55:16 2001 Delivered-To: freebsd-chat@freebsd.org Received: from gratis.grondar.za (grouter.grondar.za [196.7.18.65]) by hub.freebsd.org (Postfix) with ESMTP id D06BE37B505 for ; Thu, 3 May 2001 11:54:58 -0700 (PDT) (envelope-from mark@grondar.za) Received: from grondar.za (gratis.grondar.za [196.7.18.133]) by gratis.grondar.za (8.11.3/8.11.3) with ESMTP id f43Ishp71762; Thu, 3 May 2001 20:54:45 +0200 (SAST) (envelope-from mark@grondar.za) Message-Id: <200105031854.f43Ishp71762@gratis.grondar.za> To: Brett Glass Cc: chat@FreeBSD.ORG (chat@FreeBSD.ORG) Subject: Re: Modem Woes References: <4.3.2.7.2.20010503121434.045cac30@localhost> In-Reply-To: <4.3.2.7.2.20010503121434.045cac30@localhost> ; from Brett Glass "Thu, 03 May 2001 12:17:25 CST." Date: Thu, 03 May 2001 20:56:35 +0200 From: Mark Murray Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > At 12:05 PM 5/3/2001, Mark Murray wrote: > > >These are mutiport cards, and they can share interrupts _only_ > >because they have the hardware to do it. This hardware is NOT usual > >on a "normal" COMport. > > Actually, these ARE ordinary ports. They use exactly the same > UARTs as others. The only difference is that, if they are ISA > cards, the IRQ lines are "ORed" before they leave the card so > that there isn't a "tug of war" between two tri-state drivers > on an ISA IRQ line. In other words, you agree with me. "The hardware" is the OR gates you are talking about that motherboard UARTS don't have the privelige of using. M -- Mark Murray Warning: this .sig is umop ap!sdn To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message