Date: Fri, 09 Apr 1999 15:43:33 -0700 From: Mike Smith <mike@smith.net.au> To: NAKAGAWA Yoshihisa <y-nakaga@nwsl.mesh.ad.jp> Cc: Mike Smith <mike@smith.net.au>, "Daniel C. Sobral" <dcs@newsguy.com>, Nate Williams <nate@mt.sri.com>, Ted Faber <faber@ISI.EDU>, Nick Sayer <nsayer@quack.kfu.com>, freebsd-mobile@FreeBSD.ORG Subject: Re: Any success with CirrusLogic 6729/6730??? Message-ID: <199904092243.PAA00954@dingo.cdrom.com> In-Reply-To: Your message of "Fri, 09 Apr 1999 12:58:51 %2B0900." <199904090358.MAA02750@chandra.eatell.msr.prug.or.jp>
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> > It's not "an ISA device". > > > > Specifically, it's "not an ISA device" in the same way that the NE2000 > > is "not an ISA device". > > I disagree. ISA PCIC is ISA device with PCMCIA bus. By definition, an ISA PCIC is an ISA device. But a PCI PCIC is not an ISA device, even though it is logically identical. My point is that it is not useful to treat the PCIC as an ISA device. It should be treated as a bus bridge. > For example, SCSI cards are ISA/PCI/PCMCIA/... device. It handled > by FreeBSD, as ISA/PCI/PCMCIA/... device. SCSI is bus, PCMCIA is > bus, it same case. This is unrelated to the claim that the PCIC is an ISA device. You need to think about a bus hierarchy, not simply ISA or PCI or PCCARD. A SCSI pccard may give a bus hierarchy of nexus/PCI/PCCARD/SCSI if the PCIC is on the PCI bus, or nexus/ISA/PCCARD/SCSI if it is an ISA device. We need to treat these accordingly, and in the first case it is _not_ valid to consider the PCIC as "an ISA device". -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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