Re: UART communications question.   
     By: Ozz Nixon to All on Thu Nov 16 2017 03:35 pm   
      
   Okay, I changed the UART code to simply restore:   
      
     DisableInterrupts;   
     Port[$21] := OldPort21;                          {- Restore PIC status-}   
     Port[$20] := $C7;                                {- IRQ0 1. priority-}   
     EnableInterrupts;   
      
   This allowed me to terminate the answering test app, as soon as the next app   
   started it then dropped carrier. So this raises the question of, if I am doing   
   this correctly - does the next app (BBS or DOOR) need to set the DTR on? (I   
   think that is the line dropping me - rebuilding whie writing this).   
      
   Ozz   
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