From owner-freebsd-hackers Thu Jul 11 14:47:36 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id OAA08009 for hackers-outgoing; Thu, 11 Jul 1996 14:47:36 -0700 (PDT) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id OAA07998 for ; Thu, 11 Jul 1996 14:47:29 -0700 (PDT) Received: from sax.sax.de by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id XAA29231; Thu, 11 Jul 1996 23:46:46 +0200 Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id XAA20803; Thu, 11 Jul 1996 23:46:45 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.7.5/8.6.9) id XAA16624; Thu, 11 Jul 1996 23:43:27 +0200 (MET DST) From: J Wunsch Message-Id: <199607112143.XAA16624@uriah.heep.sax.de> Subject: Re: sio / modem problems To: freebsd-hackers@freebsd.org (FreeBSD hackers) Date: Thu, 11 Jul 1996 23:43:27 +0200 (MET DST) Cc: graichen@axp5.physik.fu-berlin.de, tom@sdf.com (Tom Samplonius) Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: from Tom Samplonius at "Jul 11, 96 02:38:12 pm" X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E X-Mailer: ELM [version 2.4ME+ PL17 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk As Tom Samplonius wrote: > You shouldn't put devices on irq 2, as it is used to cascade irqs 8 > through 15 > > irq is only safe on a XT, which has only one irq controller. Only partially right. The ISA bus line for IRQ2 is connected to the second IRQ port of the slave PIC, thus known as IRQ9. So you have to configure your card to IRQ2, but your software (kernel) to IRQ9. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)