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- Newsgroups: comp.unix.xenix.sco
- Path: sparky!uunet!world!apl
- From: apl@world.std.com (Anthony P Lawrence)
- Subject: Re: CLISTs and intelligent i/o cards
- Message-ID: <By74rA.F01@world.std.com>
- Organization: The World Public Access UNIX, Brookline, MA
- X-Newsreader: Tin 1.1 PL3
- References: <211@ucla-an.UUCP>
- Date: Tue, 24 Nov 1992 01:13:58 GMT
- Lines: 24
-
- daveh@ucla-an.UUCP (Dave Hammond) writes:
- : In article <4496@teslab.lab.oz.au> andrew@teslab.lab.oz.au (Andrew Phillips) writes:
- : >........................................ I also think CLISTS have
- : >nothing to do with it as our Specialix I/O port driver does not use
- : >them.
- :
- : This is interesting. Is the Specialix unique in not using CLISTs,
- : or is this a property of most (all?) intelligent i/o cards?
- :
- CLISTS are buffers provided by the kernel for use by character device
- drivers.
-
- There is nothing that prevents a device driver from allocating it's
- own buffers and thereby *not* use any clists, but I rather doubt that
- Specialix or any other i/o card is unbuffered :-) It may in fact be
- that Specialix feels that they need a much more sophisticated structure
- than that provided by the OS.
-
-
- Tony apl@world.std.com
- (who is no expert on this subject!)
-
- Lawrence & Clark, Inc (617) 762-0707 (206) 323-2864
- Xenix/Unix support,etc Boston Seattle
-