Subject: Re: Serial line speeds
To: None <current-users@NetBSD.ORG>
From: Paul M. Newhouse <newhouse@rockhead.com>
List: current-users
Date: 12/11/1997 22:28:19
Phillip F Knaack wrote:
>As for speeds > 115.2k, do such animals exist in the RS-232 world?
I have several serial port cards in some 486 boxes that do 115200,
230400 or 460800 Kb/s (SIIG CyberPro). I had to hack the com driver
to do 460Kb/s and I got a lot of fifo overflows at that speed.
(Actually I get quite a few at 230 as well). I haven't tried the
higher speeds since Hanum reworked the driver ... I should do that
sometime.
>I know there's RS-422 (twisted-pair) or whatever its called ..
I have a pair of 422 line drivers that will do 115.2Kb/s for about
2500ft from BlackBox. It's 1-pair (two wires) cat-1. I had to jury
rig a 9 volt additional power source onto one of the pins in the
DB-25 to DB-9 converter (yuck!!! but, if you need that 2500ft serial
console to work ... well it's just the thing).
Paul