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000189_news@columbia.edu _Wed Feb 2 15:29:39 2000.msg
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From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Subject: Re: linux kermit vs W95 hyperterm
Date: 2 Feb 2000 20:11:14 GMT
Organization: Columbia University
Message-ID: <87a312$9fc$1@newsmaster.cc.columbia.edu>
To: kermit.misc@columbia.edu
In article <87a162$tc1$1@nnrp1.deja.com>, <chase_meridian@my-deja.com> wrote:
: I am fiddling with radio-pad which connects via a serial port
: to a pc. Responsiveness is great and immediate when using
: Hyperterm under windows.
:
: However, using kermit7 under linux results in huge
: delays. For instance, the pad prompt takes 5 to 10 seconds to
: appear when pressing CR.
:
: Seeing as settings are limited under windows (4800 , 7E1,
: Xon/Xoff flow) and these are easily set using kermit, what
: else needs to be configured for responsiveness to be the
: same?
:
: The only thing that sticks out is the "set carrier-watch off"
: which is required to get any response under kermit.
:
There is nothing in Kermit that would make it sluggish in
delivering characters in each direction. To check this, why
don't you try the same connection with some other Linux program
-- cu, tip, minicom, etc -- and see if response is any
different. If it is, I'll be surprised (but interested).
If it isn't, this shows the application is delivering characters
at whatever rate they are delivered by the device driver.
I'm not sure exactly what you mean by "radio pad", but I suppose
it is some kind of radio modem. The last time I looked at these,
most of them were half duplex, and used RTS/CTS protocol (not
full-duplex RTS/CTS flow control) to control the direction of
sending. Most Unixes have no provision for this, and that
probably includes Linux.
Of course neither does Windows or HyperTerminal.
- Frank