On Friday, 02/14/2003 at 12:56 EST, "Post, Mark K" <[EMAIL PROTECTED]> wrote: > The current zSeries systems are not 64-bit addressing machines. They are > 46- (48?-) bit addressing machines. So, once again, the word size is larger > than the addressing size. I just hope IBM and everyone else learned their > lesson from MVS/XA, and don't treat the "unused" high order bits to mean > "special" things that get a lot of code built around them.
Say, what? z/Architecture machines have 64-bit addressing. It says right in the Principles of Operation that it can address 16E (16*2**60 == 2**64) bytes. Putting junk in the high-order bits will get you in trouble right away. Alan Altmark Sr. Software Engineer IBM z/VM Development
