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- From: tatsumi@elelab.nsc.co.jp (Tetsu Tatsumi)
- Newsgroups: comp.os.coherent
- Subject: Re: how to enlarge tty buffer?
- Message-ID: <tatsumi.flora100307@elelab.nsc.co.jp>
- Date: 18 Nov 92 05:00:42 GMT
- References: <tatsumi.flora100306@elelab.nsc.co.jp> <F17DuB1w165w@micromed.com>
- Sender: news@nscgw.elelab.nsc.co.jp
- Distribution: comp
- Organization: Computer Systems Lab., Electronics Research Labs., Nippon Steel
- Lines: 29
- Nntp-Posting-Host: flora.elelab.nsc.co.jp
- In-reply-to: system@micromed.com's message of 17 Nov 92 16:44:14 GMT
-
- > tatsumi@elelab.nsc.co.jp (Tetsu Tatsumi) writes:
- > > I am using Coherent 4.0 and I want to enlarge tty (or com/asy)
- > > buffers because they miss much characters at 9600bps or 19200bps
- > > on /dev/com1fl or /dev/asy**fl, /dev/asy**fr (I use 2 usual COM ports
- > > and Comtrol Hostess 550 multi-port serial card). And what is worse,
- > > tty ports with flow control were sometimes choked up because both
- > > CS and RS were turned off.
-
- I found a mistake in /etc/ttys. I made gettys run for
- /dev/com#fpl (polling ports) so they wasted CPU time. I stopped
- gettys on polling ports, and now other ttys miss less characters
- (but still missing some).
-
- In article <F17DuB1w165w@micromed.com> system@micromed.com (Duane Davis) writes:
-
- > One of the techs at MWC told me it was best NOT to use the flow control
- > ports because they used software (XON/XOFF) flow control. It's better to
- > use the regular ports with hardware flow control enabled.
-
- But they sais that devices with flow control uses the CS/RS
- flow control in Coherent 4.0 manual. And I checked the ttys with
- flow control sometimes turn on/off RS with an RS232-checker...
- (a difference between 2 versions?).
-
- /*-----------------------------*------------------------------------/
- / tatsumi@elelab.nsc.co.jp / Sagamihara Kanagawa 229, JAPAN /
- /------------------------------*-----------------------------------*/
-
- P.S. I received a mail from MWC about this question.
-