Date: Wed, 11 Apr 2001 01:21:16 -0600 From: Warner Losh <imp@harmony.village.org> Cc: "Brian W. Buchanan" <brian@CSUA.Berkeley.EDU>, freebsd-hackers@FreeBSD.ORG Subject: Re: PCMCIA-PCI bridge cards Message-ID: <200104110722.f3B7MVV20796@harmony.village.org> In-Reply-To: Your message of "Wed, 11 Apr 2001 00:59:26 MDT." <200104110700.f3B70fV20559@harmony.village.org> References: <200104110700.f3B70fV20559@harmony.village.org> <Pine.BSF.4.21.0104071745100.79240-100000@thought.adamantsys.com>
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In message <200104110700.f3B70fV20559@harmony.village.org> Warner Losh writes: : In message <Pine.BSF.4.21.0104071745100.79240-100000@thought.adamantsys.com> "Brian W. Buchanan" writes: : : Do PCI PCMCIA adapters work in 4.3? : : No. I should amplify a little here. The pci cards that plug into a desktop route interrupts over the pci bus. This routing reqires programming the bridge chip in a certain way. OLDCARD doesn't know how to do this. The same pci cardbus bridges in laptops are subtlely different. They include a "back door" to the ISA bus of some flavor. With this backdoor, we can do what we've always done and route via ISA interrupt back door and not have to change anything to use these chips in "legacy" mode. There are some things that might change this in time for 4.4. Time will tell, but I don't want to say too much about this just yet. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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