From owner-freebsd-hackers Thu Jan 18 11:39:27 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from mass.osd.bsdi.com (unknown [216.240.45.41]) by hub.freebsd.org (Postfix) with ESMTP id 8E9BF37B400 for ; Thu, 18 Jan 2001 11:39:10 -0800 (PST) Received: from mass.osd.bsdi.com (localhost [127.0.0.1]) by mass.osd.bsdi.com (8.11.1/8.11.1) with ESMTP id f0IJrmQ00749; Thu, 18 Jan 2001 11:53:48 -0800 (PST) (envelope-from msmith@mass.osd.bsdi.com) Message-Id: <200101181953.f0IJrmQ00749@mass.osd.bsdi.com> X-Mailer: exmh version 2.1.1 10/15/1999 To: Dennis Cc: hackers@freebsd.org Subject: Re: stray irq 7 In-reply-to: Your message of "Thu, 18 Jan 2001 13:04:10 EST." <5.0.0.25.0.20010118122059.01fb0b00@mail.etinc.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Thu, 18 Jan 2001 11:53:48 -0800 From: Mike Smith Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > I know we've discussed this before. But I cant believe its a "hardware > problem". Then you're not going to believe the answer. > Enabling any ISA interrupt causes the problem. Rather than the standard " > your hardware is defective", perhaps someone can explain how a masked > interrupt can be generated without being enabled. You should read the i8259 datasheet, or the datasheet for any device embedding a macrocell which emulates it. > It seems as if the masks are being written wrong. By enabling irq 5 I can > cause the problem on demand. This may well be the case, but until you read the i8259 datasheet, or the datasheet for any device embedding a macrocell which emulates it, and compare the code against what is claimed should be done, you aren't helping anyone. > What exactly is the hardware problem..and if you've identified it why is > there no simple workaround after all this time (or is there)? You should read the i8259 datasheet, or the datasheet for any device embedding a macrocell which emulates it, and once you read the section on spurious interrupts all should become clear. -- ... every activity meets with opposition, everyone who acts has his rivals and unfortunately opponents also. But not because people want to be opponents, rather because the tasks and relationships force people to take different points of view. [Dr. Fritz Todt] V I C T O R Y N O T V E N G E A N C E To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message