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- Newsgroups: comp.sys.sun.hardware
- Path: sparky!uunet!newsflash.concordia.ca!mizar.cc.umanitoba.ca!mills
- From: mills@ccu.umanitoba.ca (Gary Mills)
- Subject: Re: Sun's ZS chips (was Re: Old Sun question - HELP!!!!!)
- Message-ID: <C0o02K.7os@ccu.umanitoba.ca>
- Sender: news@ccu.umanitoba.ca
- Nntp-Posting-Host: altair.cc.umanitoba.ca
- Organization: University of Manitoba, Winnipeg, Canada
- References: <rcaldwel.726296968@ponder> <1993Jan6.115253.19572@elroy.jpl.nasa.gov> <1993Jan9.022926.26234@siemens.com> <1993Jan10.150522.8160@sol.ctr.columbia.edu> <350@gradient.gradient.com>
- Date: Mon, 11 Jan 1993 00:59:07 GMT
- Lines: 13
-
- In <350@gradient.gradient.com> ddj@gradient.gradient.com (david johnson) writes:
-
- >If the TIOCSET* ioctls were finally obsoleted, and the baud
- >rate could specified as an integer, the SCC could be programmed
- >for much faster rates.
-
- For receive, perhaps. The SCCs only have a one-byte transmit buffer,
- so they must interrupt for each character transmitted. That takes a
- lot of CPU cycles, not to mention making it sensitive to the load on
- the machine.
-
- --
- -Gary Mills- -Networking Group- -U of M Computer Services-
-