New PDF release: 14.Computers

By John G. Webster (Editor)

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Two of these, namely the configuration address port and the configuration data port, are write-only and are implemented at the fixed addresses 0279h and 0A79h, respectively. , 0207h). The configuration software has to find an address in this range which does not select a legacy card and then tell all the plug-andplay cards the actual address of this port. The bottom 6 bits of a byte written to the address port access one of 64 eightbit registers whose contents can be read via the read data port or overwritten via the write data port.

Otherwise, consider the triangle vivkvj for some k. This divides the remaining part of the polygon ͗vi, . , vj͘ into two subpolygons, ͗vi, . , vk͘ and ͗vk, . , vj͘. Thus, Tij ϭ minjϪ1 kϭiϩ1(Tik ϩ Tkj ϩ perimeter of ⌬vivkvj). The quantities Tik and Tkj have already been computed, so Tij can be evaluated in time ␪( j Ϫ i Ϫ 1). Therefore, this is an O(n3)-time algorithm, but one that computes only the weight of an optimal triangulation. However, the triangulation itself can also be easily constructed by storing, for all i, j, the value of k that minimizes the previous expression for Tij.

In general, because M is part of the input, the input size is proportional to log ͉M͉; therefore, the running time of this algorithm is exponential in terms of the input size. Such algorithms are called pseudo-polynomial algorithms. In fact, the 0-1 knapsack problem with no restriction on M is a well-known NP-hard problem and is not expected to be solvable in polynomial time (refer to the section Complexity Theory). DATA STRUCTURES Arrays and Linked Lists The array is one of the simplest and most fundamental data structures, provided as a primitive in most programming languages and used to build other data structures.

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14.Computers by John G. Webster (Editor)


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