Date: Thu, 14 Nov 1996 09:37:30 -0700 (MST) From: Nate Williams <nate@mt.sri.com> To: Bruce Evans <bde@zeta.org.au>, housley@pr-comm.com Cc: freebsd-bugs@freefall.freebsd.org Subject: Re: i386/2002: sio doesn't detect com port on Compaq Contura 430C Message-ID: <199611141637.JAA05704@rocky.mt.sri.com> In-Reply-To: <199611141330.FAA08823@freefall.freebsd.org> References: <199611141330.FAA08823@freefall.freebsd.org>
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> From: Bruce Evans <bde@zeta.org.au> > To: FreeBSD-gnats-submit@freebsd.org > Cc: Subject: Re: i386/2002: sio doesn't detect com port on Compaq Contura 430C > Date: Fri, 15 Nov 1996 00:11:11 +1100 > > >>Description: > > > > sioprobe() does not fully find my com1 port. There is PCMCIA on this > > laptop but that is disabled in the BIOS under security management. > > Com1 is at location 0x3F8 and IRQ 4. DOS, Windows, OS/2 have all been > > able to find and use this port at it's current location. > > > > The sio behaviour might be caused by an IRQ 4 conflict with the > incompletely disabled PCMCIA port. I don't know why it only affects > FreeBSD. Perhaps probing sio1 or some other device causes problems. PCMCIA ports are assigned at probe time in the hardware, not assigned by the hardware. (But, there are lots of buggy PCMCIA drivers.) You can assign both the controller and port to any IRQ you desire which will be used at probe/attach time, so this *shouldn't* be a problem. Nate
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