Date: Sat, 15 Apr 2000 14:48:42 -0600 From: Warner Losh <imp@village.org> To: John Hay <jhay@mikom.csir.co.za> Cc: acid@cn.ua (Michael Vasilenko), freebsd-current@FreeBSD.ORG Subject: Re: PCI-CardBus bridge + PCMCIA Lucent WaveLAN IEEE troubles Message-ID: <200004152048.OAA08931@harmony.village.org> In-Reply-To: Your message of "Sat, 15 Apr 2000 10:19:18 %2B0200." <200004150819.KAA95650@zibbi.mikom.csir.co.za> References: <200004150819.KAA95650@zibbi.mikom.csir.co.za>
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In message <200004150819.KAA95650@zibbi.mikom.csir.co.za> John Hay writes: : I recall (but might be wrong) that most if not all sucess stories are : on notebooks with the TI-1225 on the motherboard. Maybe the notebook : bios do something more than isn't done on a normal pc? That's entirely possible. All notebook BIOSes that I've looked at try to initialize the cardbus bridge into some known state. Many of the initialize it into a state very compatible with FreeBSD's assumptions (sometimes with some setup help from the user). Some don't. Nearly none of the desktops do the right thing as far as initialization of the cards goes, so as we see more card bus bridges we have to get smarters. On the laptops as well, one can add a TI-950 or equivalent part wired to the south bridge (well, the pci isa bridge which I think is usually called the south bridge) which allows one to do serial interrupt ISA routing over the PCI bus. I'm not sure how many desktops, if any, do this sort of thing. I just now found the datasheet from TI and have started looking at it. It does support some kind of PCI standard on the topic, but I've not looked into enough to know how standard this standard is. Briefly, it allows one to route any IRQ or PCI interrupt using a serial protocol for the interrupt. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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