CPSC 355 Lecture Notes - Lecture 2: Opcode, Square Wave, Instruction Register
30 Oct 2016
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Cpsc 355 lecture 2 - sept 14th. A basic computer system consists of: central processing unit(cpu, system clock, primary memory. Also called random access memory (ram: secondary memory. Usually a hard disk drive (hdd: peripheral input and output devices. Primary memory (ram) secondary memory (hdd) keyboard monitor. Is the (cid:862)brains(cid:863) of any computer system: executes instructions (i. e. a program, controls the transfer of data across the bus. Is usually contained on a single microprocessor chip: eg: intel core i5, apm883208-x1, apple a7. Consist of 3 main parts: control unit (cu, arithmetic logic unit (alu, registers. The cu directs the execution of instructions: loads an operation code (opcode) from primary memory into the. Instruction register (ir: decode the opcode to identify the operation, if necessary, transfer data between primary memory and registers, if necessary, directs the alu to operate on data in registers. Registers are binary storage units within the cpu: may contain:
