A computer system supports virtual memory and a paging mechanism. When a new process is created, this occupies one or more memory region. In one embodiment, at least a first memory region occupied by the process at a first virtual address has predefined, fixed, page characteristics (for example page...http://www.google.com.tw/patents/US20030088752?utm_source=gb-gplus-share專利 US20030088752 - Computer system with virtual memory and paging mechanism