On Tue, Nov 02, 1999 at 03:09:16PM +0100, Nicolas Mailhot wrote:
> Hello everyone,
> I'm currently working with a device that requires high
> speed simplex serial transfers. We'd like to connect it to a
> linux laptop (it's used in testing). Communication rates can
> reach 430100bds (simplex) but only 50700 bds (simplex) are
> absolutely required (i.e. it would be nice to reach the
> highest number, but we can live without it). Since most
> serial cards I've seen require custom divisors superior to
> 15 I think a card with a baud base of a least 812500 could
> meet our needs (6881730 would be better but I'm not too
> likely to find one, am I ?).
> Do anyone knows of such a card that works with linux ?
I don't have any PCMCIA serial cards to try but if they look like
standard serial ports with 16550 or better UARTS they should reach at
least 115,200 with no special drivers required.
I know of some ISA / PCI cards that do. Most 16550 based serial
devices will reach 115,200 with no problem. I know of several "dumb"
serial cards that include "clock doubling" jumpers that get you to
230,400 (I used this with my BitSurfer PRO EZ ISDN TAs before I finally
got the Computone drivers into the Linux kernel).
On the intelligent controller front, Computone has products that
will reach 921,600 on each port (and support up to 16 ports per expansion
chasis and up to 4 chasis per interface board and up to 4 boards per
system - that's 256 ports). I've got one is operation right now that
handles 4 ISDN BRIs for 128K of bandwidth on each of the lines. I run
all four of the DTE interfaces at 230,400 to take the most advantage of
the ISDN bandwidth. The Computone drivers are now in the stock kernel
sources.
I know the ISA / PCI stuff doesn't help you much if you really
need to do this from a laptop, but a stock PCMCIA serial card should get
you pretty close to what you want, if I understand your baud rates
correctly (they don't look like standard figures to me, here in the US).
Disclaimer: I don't work for Computone, but I am one of the
maintainers for the Computone drivers in the Linux kernel. I've been
using their products for years and now been using them with Linux for
several months without a hitch. It was a happy day when I could ditch
my SCO Unix box and convert it to Linux and be able to use my Computone
boards.
> --
> Nicolas
Mike
--
Michael H. Warfield | (770) 985-6132 | [EMAIL PROTECTED]
(The Mad Wizard) | (770) 331-2437 | http://www.wittsend.com/mhw/
NIC whois: MHW9 | An optimist believes we live in the best of all
PGP Key: 0xDF1DD471 | possible worlds. A pessimist is sure of it!
-
To unsubscribe from this list: send the line "unsubscribe linux-serial" in
the body of a message to [EMAIL PROTECTED]
