Memory - Physical Address

Card Puncher Data Processing


Application - Addressing in computer memory

Same as Memory - Physical Address ??

An offset is not an address but a address distance. See Memory Segment - Offset - (Relative|Effective) address

This article is about physical memory, the OS implements virtual memory and manipulate then virtual address. See Virtual Memory - Logical Address

When storing and retrieving data from memory, an offset is used to determine the location in which the data is stored.

This is fixed-length sequences of digits (fix size) conventionally displayed and manipulated as unsigned integers.

An address is the location identifier (id number) of one data unit (byte or word) of data in memory.


In a IO request, you will ask to retrieve 8 bytes of data starting at offset 8100.

To understand it better, just see the output of an hexdump


The location is a bit string that is much more common to find represented as hexadecimal.


Memory addressing in computer is dependent of:

One address determine the location of

Storage Size

The storage size of one address is determined by its addressing. ie



The address information is transmitted via the address bus

Documentation / Reference

Discover More
Card Puncher Data Processing
Address Bus

The address bus to transmit the address (location information). When a processor needs to read or write to a memory location, it specifies that memory location on the address bus (the value to be read...
System Bus
Architecture - Von Neumann

The Von Neumann organization is the most and well known organization (a sort of reference). It implements a instruction cycle (fetch, decode, execute, store) with the following components: the CPU...
Card Puncher Data Processing
Assembly - Label

in Assembly. A label is a name given to an addresses. Without the programmer would be required to manually calculate them. It's used to identify a target address storing: a instruction for a branch...
Byte (Bit Octet) - Computer storage Unit (8bit)

(8bit) The byte is the smallest unit of computer storage and represents: 8 bits. or 2 hexadecimal (1 hexa = 4 bit) Computer storage capacity is measured in bytes. In today’s large-capacity...
Cpu Moore Law Transistor
CPU - Word

A word is a fixed-sized piece of data processed as a unit by the processor. The word size is defined in the instruction set architecture. The term word is used for a small group of bits that are handled...
Cpu Moore Law Transistor
CPU - Word size (8, 16, 32 and 64-bit)

The bits number of a processor represents the size of a word. The number of bits in a word (the word size, word width, or word length) is an important characteristic of any specific computer architecture....
Card Puncher Data Processing
Computer - Memory (Physical memory)

Memory is synonymous with the term primary storage Technically, memory is not part of the CPU but is the memory that the processor (CPU) addresses on its bus. Memory is a storage device that stores information...
Windows Disk
Data Storage - Boot Sector Startup Processes

Two sectors are critical to start a computer on Windows: the master boot record (MBR), the first sector of a hard disk and the boot sector, which resides at sector 1 of each volume. These sectors...
Data Storage - Logical Block Addressing (LBA)

Logical block addressing (LBA) is a common scheme used for specifying the location of blocks of data stored on computer storage devices, generally secondary storage systems such as hard disks. LBA has...
Data Type - Pointer (Locator)

A pointer is the address location at which a value is stored. The pointer is a value that refers directly to (or “points to”) another value stored elsewhere in the computer memory using its address....

Share this page:
Follow us:
Task Runner