c:\test>\test\to80bit.pl >junk.dat          c:\test>readreal80 junk.dat
FFFFFFFFFFFFFFFF -1.#QNAN                   -nan
FFF8000000000001 -1.#QNAN                   -nan
FFF8000000000000 -1.#IND                    -nan
FFF0000000000001 -1.#QNAN                   -nan
FFF0000000000000 -1.#INF                    -inf
FFEFFFFFFFFFFFFF -1.7976931348623157e+308   -1.797693134862315707900e+308
8010000000000000 -2.2250738585072014e-308   -2.225073858507201383200e-308
800FFFFFFFFFFFFF -2.2250738585072009e-308   -2.225073858507201136000e-308
8000000000000001 -4.9406564584124654e-324   -4.940656458412466538300e-324
8000000000000000  0                          0.0000000000000000000000
0000000000000000  0                          0.0000000000000000000000
0000000000000001  4.9406564584124654e-324    4.940656458412466538300e-324
000FFFFFFFFFFFFF  2.2250738585072009e-308    2.225073858507201136000e-308
0010000000000000  2.2250738585072014e-308    2.225073858507201383200e-308
7FEFFFFFFFFFFFFF  1.7976931348623157e+308    1.797693134862315707900e+308
7FF0000000000000  1.#INF                     inf
7FF0000000000001  1.#QNAN                    nan
7FF7FFFFFFFFFFFF  1.#QNAN                    nan
7FF8000000000000  1.#QNAN                    nan
7FFFFFFFFFFFFFFF  1.#QNAN                    nan