Question

Explain hardware control in computer architecture

Answer 1

Answer:

The control hardware can be viewed as a state machine that changes from one state to another in every clock cycle, depending on the contents of the instruction register, the condition codes and the external inputs. The outputs of the state machine are the control signals.

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Answer 2

Answer:

Hardwired Control Unit –

The control hardware can be viewed as a state machine that changes from one state to another in every clock cycle, depending on the contents of the instruction register, the condition codes and the external inputs. The outputs of the state machine are the control signals. The sequence of the operation carried out by this machine is determined by the wiring of the logic elements and hence named as “hardwired”.

Fixed logic circuits that correspond directly to the Boolean expressions are used to generate the control signals.

Hardwired control is faster than micro-programmed control.

A controller that uses this approach can operate at high speed.

RISC architecture is based on hardwired control unit