Subject: Re: Fast serial ports
To: matthew green <mrg@eterna.com.au>
From: Pat Wendorf <beholder@unios.dhs.org>
List: port-sparc
Date: 01/17/2001 12:02:43
How would I set the clock divisor to 0?  Kernel option?

matthew green wrote:
> 
> 
>         Hmm... My SS1+ gives me an error when I try to set it to anything higher
>         than 38400. How do I enable it to work at 57600, or 115,200 needed for a
>         56k modem?
> 
>    The hardware cannot do 57600 or 115,200.  The input clock has
>    the wrong frequency.
> 
> actually, you can do both 57600 & 76800, if you set the clock divisor to
> 0, a value the manual says not to use.  however, it does work and i know
> lots of people who do this.  i've even seen hacked sunos4 kernels where,
> eg, '4800' bps, really tells it to do 76800.  a dedicated slip link
> between an ss2 & elc was used as a backdoor beyond the firewall for an
> old dated mail system.  it worked quite well at 76800...
> 
> i've done it with NetBSD on a ss2 but it never seemed to really matter
> much with my slower modems.
> 
> .mrg.

-- 

Pat Wendorf