The advantage of horizontal microinstructions is that they are more compact than vertical microinstructions,at the expense of a small additional amount of logic and time delay.

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Horizontal microinstructions are less compact because they often contain more bits to directly control the hardware, whereas vertical microinstructions are more compact as they use a smaller, encoded format which requires decoding, thus potentially adding logic and time delay.

The Advantage of Horizontal Microinstructions Is That They Are More