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From: slerner@sesame.UUCP (Simcha-Yitzchak Lerner)
Newsgroups: net.micro.pc
Subject: Re: 19.2K bps from std serial card?
Message-ID: <322@sesame.UUCP>
Date: Wed, 4-Sep-85 16:44:33 EDT
Article-I.D.: sesame.322
Posted: Wed Sep  4 16:44:33 1985
Date-Received: Sat, 7-Sep-85 04:04:14 EDT
References: <2192QAA@psuvm>
Organization: Lotus Development Corp
Lines: 37

(Original posting follows)

Yes, it is possible to get a standard pc's serial card to go up
to 38.4 Kbps without any hardware modifications.  Most programs do
not go beyond 9600 bps due to the fact that the pc's processor is
too slow to process incoming data at that rate!  (There are exceptions,
eg:Pro-Yam will run at 38.4 Kbps - it is largly a matter of how much
overhead is in the interrupt service routines.  It doesn't take too
much overhead before the I/O rate is outpacing the processor, thereby
loosing characters).


> I was in touch with a company who sells a communication program
> for the IBM-PC and has a capability of communicating at 19.2K bps.
> Most serial cards for the IBM-PC that I know of are only pro-
> grammable to 9600 bps (according to documentation).  The company
> mentioned that the standard (IBM) serial port could be configured
> to rates of 19.2K bps, and even as far as 38.4K bps.
>      
> Anybody know if this is possible?  Is it a hardware modification
> on the port, or undocumented software change?
>      
> Thanks in advance for any information!
>      
> - Tim Bieling
>      

-- 
Opinions expressed are public domain, and do not belong to Lotus
Development Corp.
----------------------------------------------------------------

Simcha-Yitzchak Lerner

              {genrad|ihnp4|ima}!wjh12!talcott!sesame!slerner
                      {cbosgd|harvard}!talcott!sesame!slerner
                                slerner%sesame@harvard.ARPA