CompuServe Messages

Well, I had always been taught that what the Mac and Windows do is object management, a form of overlaying. Normally, virtual memory is considered to be something that happens without the direct involvement of the program that is executing. As far as bounds checking, it may not be common on micros, but any mini or mainframe that wants to be regarded as a "real" multiuser platform has to do it. Quite often there is a way of asking the MMU whether or not the user is really allowed to change memory that the OS has been asked to modify. Chris