Pointers are 64-bits in 64-bit mode. The current generation AMD64 MMUs can only handle 64-bit pointers in which the high-order 17 bits are all the same (40 bits of information).
Software won't have to be re-written when AMD64 chips get larger MMUs, though. (Of course, if the software is hard-coded to limit itself to 1/2 TB user-space memory, it will still be limiting itself.) -Karl On 9/30/05, Brett Viren <[EMAIL PROTECTED]> wrote: > [EMAIL PROTECTED] (Lennart Sorensen) writes: > > > A 64bit application has 64bit memory pointers, > > I thought opteron memory was less than 64 bit wide. I'm remembering > reading somewhere (here?) it was 40 bits. > > > so it can address much more than 4GB of memory. > > True in either case. > > -Brett. > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] > >
