from the standard input stream to gather data. by default, the standard input stream is connected to the keyboard, so you can type in values or commands that the program expects. the program waits for your input
在现代CPU中,我们把这些指令叫做微指令(microcode),它包含了大多数的基本指令。微指令被用来实现更复杂的机器指令(machine code),机器指令仍然是数字,只不过更复杂。想象一下这个例子:机器指令为”76 2 3 4″, 意思是 将内存上2号位和3号位的 两个数字相加(指令代号76),结果写到内存4号位。微指令则更简单,比如...
How does the program counter work? The program counter is incremented each time an instruction is fetched, so it always points to the address of the next instruction in memory. After the fetch, the program counter is updated to the address of the subsequent instruction, allowing the central pr...
The control unit of the CPU contains circuitry that directs the entire computer system to carry out, or execute, stored program instructions. However the control unit does not execute program instructions; rather, it directs other parts of the system to do so. The control unit communicates with...
电脑是怎么工作的(Howdoesacomputerwork) Howdoesacomputerwork? Weknowthecomputeriscomputerhardwarepart(Englishnamed hardware),thecomputersystemshouldbecompletehardwareand software(Englishnamedsoftware)unity,likevideoandVCD recorders,whichitselfisjustapieceofplasticandmetal partspiledup,ifthereisnovideotapeandVCDdis...
How does open source software work? Open source code is usually stored in a public repository and shared publicly. Anyone can access the repository to use the code independently or contribute improvements to the design and functionality of the overall project. OSS usually comes with a distribution...
To keep things running efficiently, the people working in those locations need a fast, secure and reliable way to share information across computer networks. This is where a virtual private network (VPN) comes in but how does a VPN work exactly? A VPN server is a private network that uses...
Transmission Control Protocol (TCP) oversees this process in the blue Transport layer; and, in effect, TCP and IP work together. At the top, in the Application layer, you sit at your computer using an email program (an application) that uses all the layers below....
Computer systems are often vulnerable to malicious hacks, which can lead to the loss of important data and information. Computer programmers use their technical knowledge and skills to conduct security threat analysis and identify dangerous software. They instal security-oriented programs and work h...
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