What is a logical address for a computer?

What is "logic"? To put it simply, logic is that people artificially divide some things that are not regular into regular combinations in order to facilitate memory, such as: "banana, 32, pineapple, high jump, running, boy" can meet the condition of "is a Chinese character", according to the logic to divide "banana, pineapple, high jump, running"; If you can meet the condition of "can eat", there will be "banana, pineapple" logically, and the simple point of logical address is to establish some kind of connection or operation, and meet certain conditions as the premise to distinguish some types of data, for example, there are a lot of data in your computer's memory address, and all the data that can meet the requirements of "greater than 2561 and less than 3651 and are odd" is named "xsd", and the address named "xsd" is the logical address.

Logical addresses are not only used in the single computer movement, but also in the network.

The differences are as follows:

Physical address: Information is stored in bytes in memory, and in order to store or obtain information correctly, each byte unit is given a unique memory address, which is called a physical address, also known as an actual address or an absolute address.

Second, the way of expression:

Tracing back to the source, Intel's 8-bit computer has 8080 CPUs, the data bus (DB) is 8 bits, and the address bus (AB) is 16 bits. Then this 16-bit address information is also transmitted through the 8-bit data bus, and it is also stored in the scratchpad in the data channel, as well as in the registers and memory in the CPU, but because AB is exactly an integer multiple of DB, there will be no contradiction!

However, when it was upgraded to 16-bit computers, the design of Intel8086 8088CPU could not exceed 40 pins due to the limitations of IC integration technology and external packaging and pin technology at that time. However, I feel that the original address addressing capability of the 8-bit machine 2 16=64KB is too little, but it is directly increased to an integer multiple of 16, even if ab=32 bits, it cannot be reached.

Therefore, AB can only be temporarily increased by 4 to 20. Then the addressing capacity of 2 20 = 1MB has increased by a factor of 16. However, this creates a contradiction between the 20-bit AB and the 16-bit DB, and the 20-bit address information cannot be transmitted on the DB or stored in the 16-bit CPU registers and memory cells.

As a result, the principle of CPU segment structure was born.

Summary. Hello dear, the answer to your question about what the logical address of a computer network means is as follows: A logical address refers to the address of a memory cell, storage element, and network host seen from the perspective of an application in computer architecture.

Logical addresses are often different from physical addresses, and logical addresses can be converted into physical addresses through address translators or mapping functions.

Hello dear, the answer to your question about what the address of the computer network logic shouts is as follows: The logical address refers to the address of the memory cell, storage element, and network host seen from the perspective of the application in the computer architecture. Logical addresses are often different from physical addresses, and a logical address can be converted into a physical address by an address translator or mapping function.

Reference book explanation 1, in the computer with address transformation function, the address (operand) given by the access instruction is called the logical address, also called the relative address. It is necessary to calculate or transform the addressing method to obtain the physical address in the memory. 2. The address used in the user's program is called the relative slag mountain address, that is, the logical address.

3. The logical address harmony consists of two 16-bit address components, one is the segment base value and the other is the offset. Both components are unsigned number encoded.

In the computer with the address transformation function, the address (operand) given by the interview command is called the logical address, and it is also called the relative address. It is necessary to go through the calculation or transformation of the addressing method to obtain the actual valid address in the internal memory, that is, the physical address. The addressing methods of various computers (address change key dust function) are different, and when writing a program in assembly language, it is necessary to familiarize yourself with the instruction system of this machine.