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Computer Structures
- 6. Four Box Diagram Input Output Backing Store Processor Memory (RAM and ROM) CPU
Notes de l'éditeur
- digital logic circuits in the ALU are built up of gates - these gates are specific electronic circuits that produce an output signal that depends upon their input. e.g the OR logic gate if either a or b inputs are positive, then the output will be positive. with the AND gate, both a and b must be positive for the output to be positive Refer to Stallings, electrical engineering Control unit : sends signals to the ALU, registers and buses to direct their operation. Uses the system clock to keep time, coordinate functions. Generates signals to move data between registers, increment the program counter etc.
- A register may have a specific purpose or it may be general purpose. The number and type of registers varies from cpu to cpu. clock - clock ticks for each step within the cycle