In a message dated 01-20-14, Robert Wolfe said to John Kelly:   
      
   RW>    
   -> How can SIO handle the port without an IRQ? Use polling? I don't think    
   -> SIO will do that.    
   RW>     
   RW>It will; however, IIRC only if native OS/2 comm apps are using the    
   RW>port.  Otherwise, you have to assign IRQs for DOS and Win64 comm   
   RW>apps.   
      
   As long as you use the DOS built into OS/2 you don't need to assign an   
   IRQ for serial comms.   
      
   Have a nice day,   
      
   Holger   
      
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