: Yes, I was thinking intermediate code or P-code or Byte code. This is necessary to meke machine independent OS.
: I finde one tutorial like this too(maybe the same) and I am studing this now but I havent enough time.
: Thank you for replay.
You might find the thread I just posted about L.IN.O.L.E.U.M. in this same forum interesting. It is built around complete abstraction from the physical system, and uses a tiny runtime module implanted directly into the executable file to allow software to communicate with just about any type of system, once RTMs are created for them. The author of it, Alessandro Ghignola (otherwise known as Alex, around the site), would most likely be happy to explain details of how it works to you, if you post in the forum...