Date: Wed, 25 Sep 1996 13:20:03 +0200 (IST)
From: Nadav Eiron <nadav@barcode.co.il>
To: dwhite@resnet.uoregon.edu
cc: Samy Touati <lmcsato@lmc.ericsson.se>, freebsd-questions@FreeBSD.org
Subject: Re: support for 16650
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On Tue, 24 Sep 1996, Doug White wrote:

> On Tue, 24 Sep 1996, Samy Touati wrote:
> 
> > I know that the 16550 is supported I'm talking about the 16650 which 
> > allows speed up to 428K Bauds.
> 
> Ah.  I thought it was a typo at first since the page you referenced said
> 16550.
> 
> You'd have to try it. If it's a standard PC UART then it should work.
> Whether FreeBSD can take advantage of the warp speed is the question.
> 
> Unfortunately, I wouldn't know if it can or not.
I guess not. Found this in sio.c:
static  struct speedtab comspeedtab[] = {
        0,      0,
        50,     COMBRD(50),
        75,     COMBRD(75),
        110,    COMBRD(110),
        134,    COMBRD(134),
        150,    COMBRD(150),
        200,    COMBRD(200),
        300,    COMBRD(300),
        600,    COMBRD(600),
        1200,   COMBRD(1200),
        1800,   COMBRD(1800),
        2400,   COMBRD(2400),
        4800,   COMBRD(4800),
        9600,   COMBRD(9600),
        19200,  COMBRD(19200),
        38400,  COMBRD(38400),
        57600,  COMBRD(57600),
        115200, COMBRD(115200),
        -1,     -1
};

So I guess 115.2kbps is as fast as the sio driver will do.

> 
> Doug White                              | University of Oregon  
> Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
> http://gladstone.uoregon.edu/~dwhite    | Computer Science Major
> 
> 
Nadav