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From: shadow AT shadowgard DOT com
To: opendos AT delorie DOT com
Date: Fri, 23 Jan 2004 10:42:01 -0800
Subject: Re: Mailing under dos with German mail client UKA_PPP
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On 23 Jan 2004 at 18:52, Lindner-Thalmaessing AT t-online wrote:

> at&FL2M2
> Modem not responding!
> pktdrvr.bat ppp 2F8 3 28800Í 60 t-online
> 28800Í: unrecognized command
> Wrong program arguments.
> PPP link is down, driver not installed.
> Hangup (y)?
> 
> *---
> 
> Since 28800 bps is the sum of 19200 + 9600 bps, I'll next make a trial with
> 38400 (but am sure it will not work also; tested this formerly already)!

The "legal" bit rates for the UART are anything 
that'll go *evenly* into 115200.

There's a register inside the UART that has to be 
loaded (by drivers) with the "baud rate divisor".

The rate is determined by dividing 115200 (the 
default "clock rate" of the UART by this divisor.

So a divisor of 1 gives 115,200 bps
2 gives 57600
3 gives 38400
4 gives 28800
5 gives 23040

etc.

But most programs only support a few of them. 28800 
is not one of those. It tends to go:

300
1200
2400
4800
9600
19200
38400
57600
115200


--
Leonard Erickson (aka shadow)
shadow at krypton dot rain dot com