Date: Wed, 10 Jul 1996 10:23:26 +0200 (MET DST) From: grog@lemis.de (Greg Lehey) To: skrishna@cisco.com (Sridhar Krishnan) Cc: questions@FreeBSD.org (FreeBSD Questions) Subject: Recognizing serial ports (was: FreeBSD 2.1 Help) Message-ID: <199607100823.KAA22124@allegro.lemis.de> In-Reply-To: <Pine.HPP.3.91.960708161601.29367F-100000@lint.cisco.com> from "Sridhar Krishnan" at Jul 8, 96 04:34:37 pm
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Sridhar Krishnan writes: > > I have not resolved the problem using the internal modem on COM1. Here is the > scenario: > > I have MWave card on IBM Aptiva system that combines the functions of a > Sound Card, some DSP, COM1 Fax/Modem. The COM1 has an i/o address of > 02F8h (0x2f8) and uses IRQ 4. I have PS/2 mouse which is working fine. > > Has anybody heard of the Mwave Card ? I scanned through the FAQ for > hardware support and I could not find any. > > The system also comes with two (extrenal) serial ports A & B which are > configured as COM2 (0x3e8, IRQ 3) and COM3 (0x3e8, IRQ 4). Standard PC hardware will not let you share serial port interrupts. I don't know to what extent your hardware is standard, but the fact that the probes don't recognize your ports suggest that this could be the problem. > I have tried kernel configuration: > - sio0 with 0x2f8 and intr. 4 , with/without conflicts clause > and commented out sio1, sio2 and sio3. I saw the WIN95 config, it shows > COM1 at the above address. > > During boot, the kernel says that sio0 is not configured because 0x2f8 > does not respond. I believe it's looking for an interrupt. The other port is holding the interrupt inactive, so it doesn't get one. > The only way sio0 would work is if I configured my > kernel for 0x38h which is actually COM3. That is why my modem is not > responding (sincve it is configured as COM3). I don't quite understand this, but it's probably not the problem. > How do I get the kernel to recognize sio0 ? Does the serial driver only > recognize serial port cards and not this multi-function card. If so, any > ideas how I can use the built-in modem. I'd suggest that you start by choosing a different IRQ for each of your serial ports. It doesn't matter much which you choose, though I'd personally stick with IRQ 4 for sio0, IRQ3 for sio1, and something else (IRQ2? IRQ5? nothing at all?) for sio2. That way the kernel should recognize it at boot. Greg
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