Date: Wed, 14 Apr 1999 12:29:26 +0200 (METDST) From: hm@hcs.de (Hellmuth Michaelis) To: freebsd-isdn@freebsd.org (ISDN Mailinglist) Subject: A short story on PC Hardware or HELP, my ISDN card does not work! Message-ID: <m10XMv9-0000b1C@hcswork.hcs.de>
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FYI and before i forget about that:
recently i bought one of those cheap soundcards to plug it in one of my
machines.
This machine is a usual machine of a well known manufacturer and is
equipped with a PCI and an ISA bus, on the ISA bus was a working Teles
ISDN card and everything else was fine.
After installing the sound card and configuring its driver it worked
almost immediately.
But ISDN stopped working, some of you know the symptoms ...
/kernel: i4b-L1-timer3_expired: state = F4 Awaiting Signal
/kernel: i4b-L1-isic_recover: HSCX B: ISTA = 0x0
/kernel: i4b-L1-isic_recover: ISAC: ISTA = 0x94
/kernel: i4b-L1-isic_recover: ISAC: CISQ = 0x52
/kernel: i4b-L1-isic_recover: HSCX B: IMASK = 0xff
/kernel: i4b-L1-isic_recover: HSCX A: IMASK = 0xf8
/kernel: i4b-L1-isic_recover: ISAC: IMASK = 0x2a
/kernel: i4b-L2-i4b_T202_timeout: unit 0, N202 = 3
/kernel: i4b-L1-ph_data_req: still in state F3!
/kernel: i4b-L3-T303_timeout: SETUP not answered, cr = 43
/kernel: i4b-L3-next_l3state: FSM illegal state, state = ST_OW - Out Wait EST, event = EV_T303EXP - T303 timeout!
... and you all know by now that this is the IRQ not being delivered to or
recognized by the interrupt handler.
Removed the soundcard, ISDN worked. Plugged in the soundcard, ISDN does
not work anymore.
Checked memory ranges, i/o ranges, IRQ etc. etc.: nothing all was fine.
I became desparate ("this s**t PC crap hardware design !$'%&//!").
What i then did was disabling the IRQ ISA connector PCB trace on the
soundcards ISA connector, the ISDN card is or wanted to use (i didn't
want to cut the PCB trace with a knife, so i used a bit of adhesive
tape to insulate it).
And, voila, since then i again have a working ISDN card (and a soundcard)
in that machine.
Bottom line: a driver can only run if the hardware allows it to run.
hellmuth
--
Hellmuth Michaelis Tel +49 40 559747-70
HCS Hanseatischer Computerservice GmbH Fax +49 40 559747-77
Oldesloer Strasse 97-99 Mail hm [at] hcs.de
22457 Hamburg WWW http://www.hcs.de
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