.title CVT help

   This revision of CVT.BAS is a full function calculator, with
   memory functions.  Also, it now supports values entered as a PPN for
   conversion.
  
   As input is entered, it is automatically accumulated. Pressing ^RETURN^
   after the last input will display the total.

   The numeric base to be input is selected from a bar.input so to enter
   a Hex number you would press 'H' then input the numeric value. 
   If the value of any input is greater than FFFFh, the RAD50 and BINARY
   values are not displayed.
  
   The function keys around the keypad are how you select the Mathematical/
   logical operations for the calculator. Logical NOT will display the 
   NOT(val entered) with no accumulation.
  
   Pressing F1 will ^Add^ the displayed amount to memory.
   Pressing F2 will ^Replace^ memory with the displayed amount.
   Pressing F3 will ^Copy^ memory amount to the display window for operation.
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