A memory address is a specific location in a computer's memory where data is stored. Memory addressability refers to the maximum amount of memory that a computer system can access and use. In other words, memory addressability is the range of memory addresses that a computer can access, while a memory address is a specific location within that range.
There are 3 'A' modes: A mode = Addressability Mode; refers to address memory on a Mainframe computer. 3 basic Modes: 24, 31, and 64 24 and 31 A modes are becoming obsolete; many newer programming languages, such as Java will have trouble in thier processing routines due to memory and issues. 64 A mode should be the mode of choice, because the mode can handle addressability and memory issue for newer generation proogramming languages.
A Null pointer has the value 0. void pointer is a generic pointer introduced by ANSI. Before ANSI, char pointers are used as generic pointer. Generic pointer can hold the address of any data type. Pointers point to a memory address, and data can be stored at that address.
With a 20-bit address bus, a computer can address approximately 1,048,576 memory locations, which is equivalent to 1 megabyte of memory.
MAR-memory address register used stored the address of the memory loaction MBR- memory buffer register is the actully data.
A logical (or virtual) address is a reference to a memory location independent of the current assignment of data to memory; a translation must be made to a physical address before the memory access can be achieved. A relative address is the address expressed as a location relative to some known point, usually the beginning of the program. A physical address, or absolute address, is an actual location in main memory.
Memory is microchip; address are processor board slots
8byte addressability: 8bytes can be stored in each memory location. 3bits to access: so 8 memory locations ( 2^3) total size = 8 * 8bytes( each memory location contains) = 64 bytes any queries or discussions, feel free to contact me at: chintala.ganesh@wipro.com
What is the difference between a regular memory card and an Ultra Memory card
what is the difference between the memory store model and the working memory model?
There are 3 'A' modes: A mode = Addressability Mode; refers to address memory on a Mainframe computer. 3 basic Modes: 24, 31, and 64 24 and 31 A modes are becoming obsolete; many newer programming languages, such as Java will have trouble in thier processing routines due to memory and issues. 64 A mode should be the mode of choice, because the mode can handle addressability and memory issue for newer generation proogramming languages.
In a contiguous memory allocation there is no overhead during execution of a program. In a non contiguous memory allocation address translation is performed during execution.
Whenever anything is stored in the memory of your computer (RAM) it is stored at a specific place. Each specific place in your memory has its address that can be used to tell computer programs to go to those addresses to perform actions on the object stored at that address. It is similar to how you have your house number.
The number of bits used to represent a memory address determines the number of different addresses that can be formed. If the number of bits is N, then 2N addresses can be formed.If N is 16, as it is in the 8085, then 216 = 65,536.If N is 20, as it is in the 8086/8088, then 220 = 1,048,576.If N is 24, as it is in the IBM 360/44, then 224 = 16,777,216.If N is 32, as it is in most 32 bit modern processors, then 232 = 4,294,967,296.If N is 64, as it is in most 64 bit modern processors, then 264 = 18,446,744,073,709,551,616.Note that the amount of addressable memory is not the same as the amount of physical memory. As addressability goes up, often physical memory does not match it, which means that effective addressability is limited.
32 bit operating systems can only address 4GB of memory 64 bit operating systems can address 4 petabytes of memory(1 048 576 gigabytes).
Marketing.
difference between register and memory location
In contiguous allocation there is no overhead during execution of a program. In noncontiguous allocation address translation is performed during execution Contiguous memory allocates single area of memory Noncontigious memory allocates several memory areas - one memory are to each component of a process