Question

Explain diffrence between microprogram control and hardwired

Answer 1

1. Microprogram control: A microprogrammed control unit is a relatively simple logic circuit that is capable of (1) sequencing through microinstructions and (2) generatingcontrol signals to execute each microinstruction.

2. Hardwired: Hardwired control is a control mechanism that generates control signals by using an appropriate finite state machine (FSM). Microprogrammed control is a control mechanism that generates control signals by reading a memory called a control storage (CS) that contains control signals

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Answer 2

Hardwired Unit

1. It is a sequential circuit that generates control signals.

2. Speed of operations is fast.

Micro-programed Control Unit

1. It is a unit with microstructions in the control memory to generate control signals.

2. Speed of operations is slow because it requires frequent memory access.