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2024-08-07 10:31本頁(yè)面
【正文】 saving important s to the local hard drive。 detecting the arrival of new messages。s downlink FlowDescription AVP, while the PCRF of UE B uses the 64 bit prefix of the same address for the source address of UE B39。s uplink FlowDescription AVP, while the PCRF of the UE A uses the 64 bit prefix of the same address for the source address of UE A39。t sell their product unless there is software to support it. This is one of the major reasons why enterprise CPUs such as the IA64 Itanium from Intel had problems. There was little software written for the architecture and its 32bit emulation to run the existing operating systems severely crippled the CPU.So, how are AMD and Apple getting around this problem? Apple has started added 64bit patches for its operating system. This adds some additional support, but it is still running on a 32bit OS. AMD has taken a different route. It has designed its processor to handle the native x86 32bit operating systems and then added additional 64bit registers. This allows the processor to run 32bit code as effectively as a 32bit processor, but with the current 64bit versions of Linux or the uping Windows XP 64 it will utilize the full processing potential of the CPU.Is the Time Right for 64bit Computing?The answer to this question is both yes and no. The industry is reaching the limits of 32bit puting for much of the higher end puter market such as enterprise and power users. If puters are to increase in speeds and processing power, it is necessary to make the jump to the next generation of processors. These are systems that generally require much more memory and large number calculations that will get the direct benefits of a 64bit platform.Consumers are a different matter. Much of the tasks that the average consumer does on the puter are more than adequately covered by the existing 32bit architecture. Eventually, users will get to the point where the switch to 64bit puting will make sense, but currently it does not. How many consumers out there will likely even have 4 gigabytes of memory in a puter system even in the next two years?The real benefits of 64bit puting will eventually trickle down to the consumers. Manufacturers and software developers like to limit the variety of products that they have to support to try and reduce costs. Because of this, they will eventually focus solely on the production of 64bit hardware and software. Until that time, it is going to be a bumpy ride for those who choose to be early adopters.In order to solve a putational problem, its solution must be specified in terms of a sequce of putational steps,each of which may be effectively perrormed by a human agent or by a digital notations for the specification of such sequences of putational steps are referred to as programming languages. A specification of the sequence of putational steps in a particular programming language is referred to as a program. The task of developing programs for the solution of putational problems is referred to as programming. A person engaging in the activity of programming is referred to as a programmer. Programming is sometimes contrasted with coding. Coding generally refers to the writing and debugging of proguams for given program specifications, while programming includes the task of preparing the program specification as well as that of writing the program. The text of a program is sometimes referred to as code, and lines of program text are referred to as lines of code, especially in the case of machinelanguage programs. The term coder is used, sometimes pejoratively, to describe a person engaged exclusively in implementing program specifications prepared by orthers. The programs for the earliest digital puters were wrtten in a machine language. Pure machinglanguage protramming required the jprogrammer to write out the sequences of binary or decimal digits by which each instruction was represented in the puter memory. By the mid1950s it was realized that programmers could specify instruction codes and memory locations by symbolic mnemonics, which could be translated into the internal machine language by a translation program called an assembler. In the late 1950s and in the 1960s, procedureoriented language were developed to allow programmers to specify algorithms in a notation natural to the problem being solved. Programs specified in a procedureoriented language were tuanslated into the internal language of a particular puter by a translation program called a piler. The monly used programming language in the 1960s and 1970s included FORTRAN,ALGOL60,COBOL,PL/1,and APL. A problem spccification is generally given in terms of a desired relation between inputs and outputs which specifies what is to be puted. An algorithm or program for a given problem specifies how the given relation between inputs and outputs is to be achieved. It is the task of the programmer to convertstatic input/output specifications of what is to be puted into dynamic specifications that specify how the putation is to be performed.Another type of translator is the assembler, which is used for programs or parts of programs written in assembly language. Assembly language is another programming language, but it is much more similar to machine language than other types of highlevel languages. In assembly language, a single statement can usually be translated into a single instruction of machine language. Today, assembly language is rarely used to write an entire program, but is instead most often used when the programmer needs to directly control some aspect of the puter’s function. Programs are often written as a set of smaller pieces, with each piece representing some aspect of the overall application program. After each piece has been piled separately, a program called a linker bines all of the translated pieces into a single executable program. Programs seldom work correctly the first time, so a prog
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