21. The Windows NT series of operating systems, by contrast, are true multi-user, and implement absolute memory protection . 22. Primarily, this separation serves to provide memory protection and hardware protection from malicious or errant software behaviour. 23. The 980 was, for its time, a relatively powerful small computer that offered memory protection and multiple-priority interrupt capabilities. 24. Here is an example of ANSI C code that will generally cause a segmentation fault on platforms with memory protection . 25. It also adds increased memory protection to let the operating system take advantage of new CPUs such as the AMD64. 26. It required a memory management unit ( MMU ) to support memory protection , so was not compatible with 8088 processors. 27. Although Windows 9x features memory protection , it does not protect the first megabyte of memory from freeze the operating system. 28. This mode allowed fast, direct access to the system's entire RAM without requiring a memory manager or memory protection mechanism. 29. The Intel iAPX 432, begun in 1975, attempted to implement a true segmented architecture with memory protection on a microprocessor. 30. Windows versions 3.1 through ME had some level of memory protection , but programs could easily circumvent the need to use it.
