Date: Fri, 19 Jul 1996 08:48:38 -0500 (CDT) From: Alex Nash <alex@fa.tdktca.com> To: Bruce Evans <bde@zeta.org.au> Cc: E00114@vnet.atea.be, freebsd-hardware@freebsd.org Subject: Re: Multiple COM ports with same IRQ Message-ID: <Pine.BSF.3.91.960719083338.7070M-100000@fa.tdktca.com> In-Reply-To: <199607190247.MAA30281@godzilla.zeta.org.au>
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On Fri, 19 Jul 1996, Bruce Evans wrote:
> >> ISA boxes can
^^^^^^^^^
> >> have hardware installed (accidentally?) with devices sharing the same IRQ, but
> >> the drivers cannot deal with it.
>
> >The sharing of interrupts between ISA devices is an electrical
> >constraint. When two devices are attempting to use a common IRQ line,
>
> That's why he only wanted to share them for EISA/ISA boxes :-).
That's funny, I see ISA boxes mentioned above :) But maybe you can tell me
how an EISA/ISA box solves the IRQ sharing problem for ISA devices.
Alex
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