How to do 64 bit inline assembly in FreePascal?

[Dann Corbit]

I thought it might be nice to do a 64 bit port of Booot:
http://forum.lazarus.freepascal.org/ind ... 147.0.html
But I do not know how to do 64 bit inline assembly in FreePascal.

Does anyone here know how to do it?
There are only a couple hundred lines and since Booot is a bitboard program I guess it would benefit in a mighty way.

I would talk directly to the author of Booot, but I do not know his email address.