Subject: Re: hardware flow control on serial ports
To: None <email@example.com>
From: Mike Long <firstname.lastname@example.org>
Date: 02/27/1995 00:30:10
>Date: Sun, 26 Feb 1995 20:07:18 -0700
>From: Achyutram Bhamidipaty <email@example.com>
>This makes me think that flow control is not working correctly. But
>I'm really not sure where to look. I really dont want to hook an
>oscilliscope up to the serial port to see whats going on.
>I figure atleast one of the following must be true:
> - kermit is not turning it on
I find this the most likely. Try the following:
1) Start Kermit.
2) Dial and connect as usual.
3) Type ^\c to escape back to the local kermit
4) Type PUSH to start a subshell
5) Type stty -af /dev/tty00 to look at your serial port settings
(replace tty00 with the appropriate TTY). If you see -crtscts,
then Kermit is not setting RTS/CTS flow control properly. If you
see ixon instead of -ixon, then you're using XON/XOFF flow control
and YOU WILL BE HOSED if anything on the remote end of the link
sends you a ^S character.
> ATI 9600baud modem
> boca 16550 serial board
Are you using a cable to connect these that connects the RTS & CTS
> c-kermit 5A
5A(189) or 5A(190)? There's a big difference. If you're using a
C-Kermit that's not version 5A(190), then upgrade and your problems
will probably be over.
> unpatched netbsd-1.0
Mike Long <firstname.lastname@example.org> PGP 2.6.2 public key signature:
VLSI Design Engineer CCBF225E7D3F7ECB2C8F7ABB15D9BE7B
Analog Devices, CPD Division
Norwood, MA 02062 USA assert(*this!=opinionof(Analog));