Date: Wed, 19 Jan 2000 01:31:37 -0500 (EST) From: Mike Nowlin <mike@argos.org> To: Tim Tsai <tim@futuresouth.com> Cc: Chip Marshall <chip@eboai.org>, freebsd-small <freebsd-small@FreeBSD.ORG> Subject: Re: PC/104 Message-ID: <Pine.LNX.4.05.10001190127570.11030-100000@jason.argos.org> In-Reply-To: <20000114160203.A24225@futuresouth.com>
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> One additional difference is that PC/104 supports IRQ sharing (across > different devices on the bus). I don't remember the details <mumbles > something about impedance and pull-up/down> I've been kinda wondering about this for a while.... From everything I've been able to find, it's not the ISA bus itself that causes problems with sharing IRQ's, but it's the cheap cards we're so used to seeing everywhere that don't use open-collector drivers. I have successfully shared interrupts using old (bulky, lots of chips, sucks up lots of power) cards in the past, but the modern stuff hates it. Any input? mike To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-small" in the body of the message
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