Date: Sun, 17 May 1998 10:38:09 -0400 (EDT) From: Jt <hometeam@techpower.net> To: John Kelly <jak@cetlink.net> Cc: questions@FreeBSD.ORG Subject: Re: sio driver Message-ID: <Pine.BSF.3.96.980517103543.1143B-100000@techpower.net> In-Reply-To: <355f23bc.87309735@mail.cetlink.net>
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Yes could I see your kernel config file on how you change the fifo buffer?
I am running stable I wonder if this option is available in the 2.2.6
release?
hometeam@techpower.net
--We cannot all be masters, nor all masters
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On Sun, 17 May 1998, John Kelly wrote:
> On Sun, 17 May 1998 06:49:11 -0400 (EDT), Jt <hometeam@techpower.net>
> wrote:
>
> >Yeah I was trying for the 230000 I am isdn that was the whole
> >purpose of the 16650 to increase thoughput.
>
> Don't define it to SIO as a 650. Define it as a 550. The only
> trouble I ever had was when I tried to tell SIO the UART was a 650
> (which it actually is).
>
> There's an obscure setting (in -current, I don't know about -stable)
> where you can tell SIO that a 550 UART has a transmit FIFO larger than
> 16 bytes. That's the only real benefit of trying to define it as 650
> anyway, because you get the larger receive FIFO by default, no matter
> whether defined as a 650 or 550.
>
> I can post my serial port kernel config if you want to see how to use
> the transmit FIFO size setting when defined as a 550.
>
> >jkh mention that freebsd could handle 230 no problem just the 115000
> >16550 was the restriction.
>
> Not if your serial card has a 2x clock jumper. I run 230,400 on
> either a 650 or 550 with no errors.
>
> >it runs in windows 95 fine on the 230000 settings.
>
> It only works with serial cards which have 2x or 4x jumper settings.
> You tell SIO the speed is 115,200, and the 2x clock jumper makes it
> really run at 230,400.
>
> Works great here with a 3Ccom Impact IQ ISDN at 128k. I run multiple
> ports, one upstream ISDN and several downstream modems, no errors.
>
>
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