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Article #1432Re: How do get COMx to do 19,200 baud
From: John Wilber
Date: Fri, 02 Mar 1990 06:38
Date: Fri, 02 Mar 1990 06:38
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1853 bytes
I've got a few suggestions. First, you can get some VERY HIGH baud rates from a serial port, as high as 100+ kbaud, if memory serves me correctly. Programs such as LapLink, and the Norton Commander 3.0 do this with file transfers between PC's. My guess is that you can get around any BIOS limitations by writing directly to the registers on the 8250 controlling the serial port. The 8250 is called a UART (say YOO-art, stands for Universal Asynchronous Receiver/Transmitter) and is basically a serial port chip. Each serial port has an 8250. Check some literature from Intel (they make the chip) for WHAT to write to the registers, and check some PC documentation for what ports or memory locations to write to so you can access these registers. Hope this helped. /***********************************************************************\ * John J. Wilber * "Im Himmel gibts kein Bier zum trinken wir * * wilber@nunki.usc.edu * es hier" -German Proverb * * Student, partier, beer * "In heaven there's no beer, so we might as * * drinker, fun-loving guy. * well drink it here" -Translation * ************************************************************************* * "I woke up this morning and I got myself a beer" -The Doors * \***********************************************************************/
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!chaph.usc.edu!nunki.usc.edu!wilber From: wilber@nunki.usc.edu (John Wilber) Newsgroups: comp.sys.ibm.pc.programmer Subject: Re: How do get COMx to do 19,200 baud Message-ID: <8422@chaph.usc.edu> Date: 2 Mar 90 06:38:42 GMT References: <32894@prls.UUCP> <2956@jato.Jpl.Nasa.Gov> Sender: news@chaph.usc.edu Distribution: usa Organization: University of Southern California, Los Angeles, CA Lines: 24