> > But you can only walk 4095 meters, can't you? Way short of > the circumference of the globe. > > > > but you forget scale. Assume circumference is 4096 units and > apply the above
In this case the circumference is 2147483648 steps. So 4095 steps isn't going to get me very far. Unless you would want to move 2147479552 (or more) steps backward. Anyway; it seems everybody agrees on the fact that the base+index allows you to designate the starting point of an addressable window of 4096 bytes on a circular array of 2^31 bytes. The offset allows you to address any byte within that window. And yes: it is possible to set up a combination of USINGs and register contents that allow you to assemble the instruction... LA R2,-4(R3) It is clever, but not everybody thinks that it is wise. I for one, do not. Fred! ----------------------------------------------------------------- ATTENTION: The information in this electronic mail message is private and confidential, and only intended for the addressee. Should you receive this message by mistake, you are hereby notified that any disclosure, reproduction, distribution or use of this message is strictly prohibited. Please inform the sender by reply transmission and delete the message without copying or opening it. Messages and attachments are scanned for all viruses known. If this message contains password-protected attachments, the files have NOT been scanned for viruses by the ING mail domain. Always scan attachments before opening them. -----------------------------------------------------------------
