Date: Thu, 03 May 2001 20:56:35 +0200 From: Mark Murray <mark@grondar.za> To: Brett Glass <brett@lariat.org> Cc: chat@FreeBSD.ORG (chat@FreeBSD.ORG) Subject: Re: Modem Woes Message-ID: <200105031854.f43Ishp71762@gratis.grondar.za> In-Reply-To: <4.3.2.7.2.20010503121434.045cac30@localhost> ; from Brett Glass <brett@lariat.org> "Thu, 03 May 2001 12:17:25 CST." References: <4.3.2.7.2.20010503121434.045cac30@localhost>
next in thread | previous in thread | raw e-mail | index | archive | help
> 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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200105031854.f43Ishp71762>