Date: Thu, 6 Mar 1997 01:08:38 -0500 (EST) From: Mike Kerr <mkerr@kerris.com> To: Michael Smith <msmith@atrad.adelaide.edu.au> Cc: freebsd-hardware@freebsd.org Subject: Re: Problems with 2.1 Probe? Message-ID: <Pine.BSF.3.95q.970306010302.304B-100000@lugh.kerris.com> In-Reply-To: <199703050019.KAA18729@genesis.atrad.adelaide.edu.au>
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On Tue, 4 Mar 1997, Michael Smith wrote: > Mike Kerr stands accused of saying: > > I've had, on occasion, difficulty with my system probing my modem. I've > > > > modem has been configured to COM3 (sio2) on IRQ 4, with the standard 3e8 > > base address. > > > > It's getting *really* frustrating. I've even tried changing the IRQ on > > this latest attempt to IRQ 3, but it still won't detect it. The machine > > I'm running is a 386DX-40 with 8M RAM. > > Neither IRQ 3 nor 4 are available if you have sio0 or sio1 respectively > configured; you will have to use a different interrupt in that case. I have disabled sio0 and sio1 in every configuration because I don't use them. I've tried booting with my normal kernel, with the kernel.old, and with the generic kernel. > > Is anybody aware of any incompatibilities with 386 motherboards and fast > > COM ports, or if the probe has problems, or if there is a way I can > > bypass the probe to get the thing to work? > > If your modem is an internal unit, and it does not have a _real_ UART > on the board, it's likely that it is too _slow_, and the 2.1 sio > probe is giving up on it. You could try booting a 2.2 installation > disk to see if it finds it, once you have fixed your interrupt problem. I'll try that. The modem is a 33,600 modem, one of the new ones, although a noname. The 28.8 I used was a Boca, though exhibited similar problems. Interestingly though, I am able to get it to detect fine if I a) boot with kernel.GENERIC and b) remove the ethernet card. Ethernet card IRQ: 10 Base: 0x280 Modem IRQ: 5 Base: 0x3E8 There should be no conflict here, yet if I boot with the generic kernel and not have the ethernet card plugged in, it works. If I plug the card it, it doesn't. Similar config does not work on subsequent kernel builds other than generic. If it would help, I could email you my kernel config file. Perhaps I've done something nutsy in it that I've overlooked, but I don't think so. > > Oddly enough, if I boot into my DOS partition and use something like > > Telemate, it works fine. > > DOS communications programs have very low expectations of serial hardware. > You could probably jam a digestive biscuit into an ISA slot and log on > to your favorite BBS with it, but that won't work too well with the > BSD sio driver. You've got a point. :) I've seen DOS terms that completely ignore the IRQ... Thanks! Mike. =-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=-=-=-=-=-=-=--=-=-=-=-=-=-=-=-=-=-=-=-=-= Mike Kerr | http://www.net/~mkerr Kerr Information Systems | http://www.kerris.com/ mkerr@kerris.com | Web Guy, etc.
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