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From: Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: reading from com1:  => driving me nuts
Date: 20 Oct 2005 08:47:14 GMT
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Nick Müller <muellernick AT gmx DOT de> wrote:
> Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de> wrote:

> > You're pretty much guaranteed to lose some
> > characters every once in a while, at such high baud rates. 

> BTDT. You are right.
> _But_ it also helps to make the communication stable. 

What helps?  Making the baud rate higher than the software layers can
handle?  You must be kidding.

> > > set propper params with MODE com1:blablabla
[...]
> The way is "crude", but it's the way the OS supports. 

Actually, I seem to remember the OS doesn't support 115200 baud at
all, be it through the 'mode' command or through DOS API calls.  The
difference being that 'mode' will probably not even inform about its
failure to actually set that baud rate.

> I think that fiddling with hardware is not the right way to go. 

Then, with all due respect, you think wrongly.

> > > DOS-box under Win XP pro.
> > That's about as hostile an environment as you could come up with.
> ACK. But that's what I have.

Then you're SOL.  In particular, you should throw away and forget all
results from communication tests you made under XP --- they have
essentially nothing to do with what you'll see on real DOS.

-- 
Hans-Bernhard Broeker (broeker AT physik DOT rwth-aachen DOT de)
Even if all the snow were burnt, ashes would remain.