An address bus is a computer bus (a series of lines connecting two or more devices) that is used to specify a physical address. When a processor or DMA-enabled device needs to read or write to a memory location, it specifies that memory location on the address bus (the value to be read or written is sent on the data bus). The width of the address bus determines the amount of memory a system can address. For example, a system with a 32-bit address bus can address 232 (4,294,967,296) memory locations. If each memory address holds one byte, the addressable memory space is 4 GB.
Read more about Address Bus: Implementation, Interesting Examples
Famous quotes containing the words address and/or bus:
“Give a boy address and accomplishments and you give him the mastery of palaces and fortunes where he goes.”
—Ralph Waldo Emerson (1803–1882)
“It seemed a long way from 143rd Street. Shaking hands with the Queen of England was a long way from being forced to sit in the colored section of the bus going into downtown Wilmington, North Carolina. Dancing with the Duke of Devonshire was a long way from not being allowed to bowl in Jefferson City, Missouri, because the white customers complained about it.”
—Althea Gibson (b. 1927)