Subject: Serial console and handshaking
To: None <port-amiga@netbsd.org>
From: John <john@sixgirls.org>
List: port-amiga
Date: 04/21/2001 16:16:09
Hello,
A few weeks ago I had a problem when I tried to use a serial console for
my colocated server: the serial port is configured to use handshaking.
Because I was not running a terminal program on the machine that the
serial was connected to, my Amiga didn't start up entirely, and waited
there for hours until I went to the colo facility and discovered that all
it needed was for the handshaking to be on.
This seems a little dangerous to me; although leaving Minicom running
attached to a screen is relatively easy, I can only wonder what would
happen if the two machines got power cycled simultaneously. Chicken and
egg problem.
I am learning to administer a small fleet of SunBlade machines (cheap Sun
SPARC workstations with PC chipsets); they all run serial consoles, but
keep on running no matter if a serial cable is plugged in or not. Doesn't
this make more sense?
This brings up another issue: although 1 bit video on the Amiga chipset is
really fast, how much output can a kernel print before getting held? I've
wondered this because of the REALLY slow video on an old SPARCStation 2,
and now I wonder because of the serial handshaking issue. Can the kernel's
output buffer be increased?
And how does one turn off handshaking for the serial console?
Thanks,
John Klos