Run in 64-bit long mode

[JoverZhang]

Thank you for your project. Which has provided me with great help.

But, Have you thought about implementing an operating system that runs in 64-bit (long mode)?
Maybe it can be more modern. Contains SMP, process management, and VFS.

This will be very interesting.

[sasdallas]

This would be pretty cool to see - just not sure if we could do it with multiboot? VFS and process management are well documented things and could be added without it.