Subject: Re: Lowest serial latency?
To: Chris Baird <firstname.lastname@example.org>
From: Jon Lindgren <email@example.com>
Date: 12/28/1999 10:15:32
On 29 Dec 1999, Chris Baird wrote:
> One thing to do if your milliseconds count is to make sure that
> FIFO_TRIGGER_14 (see /sys/dev/ic/com.c) isn't set on the port. Either
> by munging (s/TRIGGER_14/TRIGGER_1/), or by placing a 8250/16450-based
> serial card in the machine.
I'm assuming that if I have a 16550x card that I can just clear that
bit? Or should I invest the time and find an old 8250? I belive all the
ports on the ppro are 16550a/b/c's, but I'm not sure about the equivilent
uarts on the sparcs (zilogs?) or alphas (zilogs, too?).
Thanks for the info.
"Xyzzy! You're a duck!"