Windows and high (>19.2K) baud rates

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1 total messages Started by Courtney Meissen Sat, 25 Jul 1992 23:08

#64

Author: Courtney Meissen
Date: Sat, 25 Jul 1992 23:08

29 lines
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Questions on Serial communications from Windows:

1) Standard Windows API's don't accept baud rates higher than 19200
   (API's like BuildCommDCB(), SetCommState()).

   Is there a workaround from Windows?
   What are the baud rate indices in the 3.1 Windows.h (CBR_*) for?
      They are not used by any of the sample code in the 3.1 SDK.

   If I ignore the API's and set up the DCB myself, SetCommState
      still fails (don't know what the error codes mean, this one
      returns -5).
   I would be willing to talk to the port directly, but I see that
      the Dos int $14 functions only document a maximum baud of 19200
      (int $14, function 4 - Extended initialize comm port).

   Is there an inherent limit of 19200 with Windows since it is built
      on top of Dos?
   Are there any substitute comm.drv drivers for Windows that would
      support higher baud rates?

Please help!!
-- 
Courtney Meissen		   Microtek Development Systems Division
courtney@data.rain.com		   3300 NW 211th Terrace
uunet!intelhf!percy!data!courtney  Hillsboro, OR  97124  (503)645-7333x446
"There's a light at the end of the tunnel.. I hope it ain't no train."

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