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In computing, a page fault is an exception that the memory management unit (MMU) raises when a process accesses a memory page without proper preparations. Accessing the page requires a mapping to be added to the process's virtual address space. Furthermore, the actual page contents may need to be loaded from a back-up, e.g. a disk.
The first popular video terminal to support these sequences was the Digital VT100, introduced in 1978. [2] This model was very successful in the market, which sparked a variety of VT100 clones, among the earliest and most popular of which was the much more affordable Zenith Z-19 in 1979. [3]
The American mathematician Richard Hamming pioneered this field in the 1940s and invented the first error-correcting code in 1950: the Hamming (7,4) code. [ 5 ] FEC can be applied in situations where re-transmissions are costly or impossible, such as one-way communication links or when transmitting to multiple receivers in multicast .
New classes of VCP codes associated with asset management, secondary displays (for information, status, etc.) and remote program calls to the display processor are introduced. MCCS Version 2, Revision 1 was released on May 28, 2005 and included some minor updates, as well as clarifications and improved usability of the standard.
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Replies referring to the control and data connections. x3x: Authentication and accounting Replies for the login process and accounting procedures. x4x: Unspecified as of RFC 959. x5x: File system These replies indicate the status of the Server file system vis-a-vis the requested transfer or other file system action.
This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in URL redirection. [2] A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD. A user agent may automatically redirect a request.
Under Windows NT, the second and third sections of the screen may contain information on all loaded drivers and a stack dump, respectively. The driver information is in three columns; the first lists the base address of the driver, the second lists the driver's creation date (as a Unix timestamp), and the third lists the name of the driver. [30]