NAME
        fpa - convert fast floating point into ASCII string equivalent
   SYNOPSIS
        exp = fpa(fnum, &string[0]);
   FUNCTION
        Accepts an FFP number and the address of the ASCII string where it's
        converted output is to be stored.  The number is converted to a NULL
        terminated ASCII string in and stored at the address provided.
        Additionally, the base ten (10) exponent in binary form is returned.
   INPUTS
        fnum       - Motorola Fast Floating Point number
        &string[0] - address for output of converted ASCII character string
                     (16 bytes)
   RESULT
        &string[0] - converted ASCII character string
        exp        - integer exponent value in binary form
   BUGS
        None