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Randy, >I think Frank Soltis probably has the last and authoritative word on the >subject. (snip) >Pointers CANNOT be counterfeited. .... Anyone else who creates a pointer, >copies a pointer, or >modifies a pointer has NO WAY [emphasis added] to turn the tag bits on and >will end up with a useless 16-byte entity." I know that is what Dr. Frank claims. I've read the book too. But I've also read Leif's book. And before you decide that a pointer CANNOT be counterfeited, and that there is NO WAY to turn the tag bits on, you may want to read chapters 6 & 7 of Leif's book. And follow his instructions to create a program which DOES counterfeit a pointer and DOES turn on the tag bit. Try it on your own system and you'll see. It *is* possible. Leif's book isn't theory. He provides the code and instructions to back up his assertions. Leif's book is at http://iseries400.org/ and comes highly recommended. You can learn *alot* about the system by reading his book... Doug
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