From: gvision@ntlworld.com   
      
   "Björn Felten"  wrote in message   
   news:nO6ge.23897$d5.171646@newsb.telia.net...   
   >     I wouldn't say it's that obvious, unless you were doing programming   
   > for the old PC, where the Xtal, that also happened to produce the timing   
   > for the UART, was chosen so it could produce an exact clock cycle for   
   > the old 300, 1200, 2400, 4800, 9600 and so on, speeds of yesterdays. 8-)   
      
   That wasn't the reason for the choice of crystal frequency at all. That   
   frequency in fact produces quite poor standard UART bit rates. The reason   
   was to do with the video display and IIRC, was chosen because of some   
   NTSC-specific timing parameter.   
      
   --   
   Jay   
      
   Author of Graphic Vision   
   http://homepage.ntlworld.com/gvision/   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)