Friday, April 30, 2010
Something i liked in this class!
5 basic parts/subsystems of a computer!
2.
(a) Memory stores both the program while it is running and the data on which the program operates. It is organized as a sequence of discrete locations and is composed of 1 byte. Each memory location has an address and are whole numbers starting at 0. Memory locations record or store values. Memory locations have a finite capacity.
(b) Control unit of a computer is the hardware implementation of the Fetch/Execute Cycle. Its circuitry fetches an instruction from memory and performs the other operations of the Fetch Execute Cycle on it.
(c) Arithmetic/Logic Unit (ALU) performs the “math” The ALU is the part of the computer that generally does the work during the Instruction Execute step. A circuit in the ALU can add two numbers and there are different circuits for different types of math.
(d)Input and Output unit-These two components which are the inverses of each other are the wires and circuits through which information movies into and out of a computer. A computer without input or output is useless.