>So when we move to a higher version of hardware the storage area below the line shrinks ?
Not necessarily. It may or may not, and the cautious system programmer may or may not be able to avoid it. There are certain boundaries in the address space map that must lie on a megabyte boundary. The boundary between the common and the private areas is one. A single byte more used in the common area might move the common-private boundary down by one megabyte. One is often able to reduced the size of some common areas (CSA/SQA) by a small about and thus avoid the common-private boundary shift. HTH Peter Hunkeler ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
