Article View: comp.sys.ibm.pc.programmer
Article #1459Re: How do get COMx to do 19,200 baud
From: Doug Stevens
Date: Mon, 05 Mar 1990 17:29
Date: Mon, 05 Mar 1990 17:29
11 lines
1135 bytes
1135 bytes
In article <8422@chaph.usc.edu>, wilber@nunki.usc.edu (John Wilber) writes: > ... you can get some VERY HIGH baud > rates from a serial port, as high as 100+ kbaud ... Specifically, you can get up to 115,200 baud by writing directly to the 8250. You do need to be careful -- not all 8250's are guaranteed to run with a divide-by-one in the oscillator control register with those crystal frequencies (Western Digital, if I remember, is one of these). You also need to play some software tricks to ensure that the transmitting end does not over-run the receiving end with these baud rates.
Technical Details
Message-ID:
<5745@videovax.tv.tek.com>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!cs.utexas.edu!rice!uw-beaver!zephyr.ens.tek.com!tekfdi!videovax!dougsReferences:
<32894@prls.UUCP> <2956@jato.Jpl.Nasa.Gov> <8422@chaph.usc.edu>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!cs.utexas.edu!rice!uw-beaver!zephyr.ens.tek.com!tekfdi!videovax!dougs From: dougs@videovax.tv.tek.com (Doug Stevens) Newsgroups: comp.sys.ibm.pc.programmer Subject: Re: How do get COMx to do 19,200 baud Summary: Baud rates to 115,200. Message-ID: <5745@videovax.tv.tek.com> Date: 5 Mar 90 17:29:42 GMT References: <32894@prls.UUCP> <2956@jato.Jpl.Nasa.Gov> <8422@chaph.usc.edu> Distribution: usa Organization: Tektronix TV Measurement Systems, Beaverton OR Lines: 11