Floating Point

       IEEE 4 byte real

31	30 ... 23	22 ... 0
s	8 bits	msb 23 bit mantissa lsb
sign bit	biased exponent (7Fh)	mantissa

       IEEE 8 byte real

63	62 ... 52	51 ... 0
s	11 bits	msb 52 bit mantissa lsb
sign bit	biased exponent	mantissa

       Microsoft 4 byte real

31 ... 24	23	22 ... 0
8 bits	s	msb 23 bit mantissa lsb
biased exponent (81h)	sign bit	mantissa

       Microsoft 8 byte real

63 ... 56	55	54 ... 0
s	8 bits	msb 55 bit mantissa lsb
biased exponent (401h)	sign bit	mantissa

       IEEE 10 byte real (temporary real)

79	78 ... 64	63	62 ... 0
s	15 bits	1	msb 63 bit mantissa lsb
sign bit	biased exponent	first mantissa bit	mantissa

       Turbo Pascal 6 byte real

47 ... 40	39	38 ... 0
8 bits	s	msb 39 bit mantissa lsb
biased exponent (80h)	sign bit	mantissa

       Microsoft Fortran Complex number

Float Real component

Float Imaginary component

           (each component is either 8 or 16 byte IEEE real)

       - sign bit representation:  0 is positive  and  1 is negative
       - in all float formats except the IEEE 10 byte real, the
         mantissa is stored without most significant bit; since
         the state of this bit is known to be set, it is not
         included and the exponent is adjusted accordingly
       - all formats use binary float representation
       - memory representation uses 80x86 reverse byte/word order.

       True exponent is the exponent value minus the following bias:

             81h for Microsoft 4 byte real
            401h for Microsoft 8 byte real
             7Fh for IEEE 4 byte real
            3FFh for IEEE 8 byte real
             80h for Turbo Pascal 6 byte real

            Size                  Range             Significant digits

         4 byte real     8.43x10E-37 to 3.37x10E38         6-7
         8 byte real    4.19x10E-307 to 1.67x10E308       15-16
        10 byte real    3.4x10E-4932 to 1.2x10E4932         19