rskey's Calculator forensics in Fortran

[HP67]

Updated with new source and results of three additional compilers. Added DEC F77 for VMS/VAX and IBM G & H FORTRAN for OS/360. G and H results are identical since both compilers use the same library. If anybody has a copy of H Extended it will be illuminating to see what the results are with the HX library and REAL*16. There is an F77+ compiler for IBM mainframes also but I haven't had access to it in years.

I guess I should consolidate the results from the two other people who contributed. Guys, please let me know if it is ok and I'll copy your results into the first post also. And if you still have it, please post your source code. Thanks.