Date: Tue, 17 Oct 1995 00:48:28 -0400 From: "Johanan L. Codona" <codona@planet.net> To: freebsd-current@FreeBSD.ORG Subject: Re: kern/647 Sound cards fail to work Message-ID: <199510170448.AAA12843@rustic>
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Well I figured it out. I was right in that the interrupt routine was not being called. The routines snd_set_irq_handler(sbc_irq, sbintr) and snd_release_irq (sbc_irq) are red herrings! They don't do the *real* job of setting up audio interrupts, that is done elsewhere. However, register_intr() does get called, and with sensible values. As those who replied to me noticed, my printer was also on the canonical irq 7. I had set the "conflicts" keyword, thinking that that would allow me to share interrupts. But on reading the source for register_intr, I saw that there is no such thing as shared ISA interrupts, unless they are processed by the *same* handler. This was the cause of my confusion. So I reshuffled my IRQs and now it works. I guess I missed where it said that interrupts of different types cannot be shared. I have seen others describe this problem too. Disabling the interrupts on the printer doesn't help because if irq 7 gets assigned to LPT0 first, that's it! All other handlers will be bounced. If there was more to kern/647 I would be curious to find out what. For now, I have a working sound card, and consider the case closed. -- Johanan L. Codona The Stekas Group codona@planet.net
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