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Compare horizontal microprogramming with vertical microprogramming

written 6.8 years ago by nilimazade.mtech • 90

modified 2.7 years ago by binitamayekar ★ 6.6k

computer organization and architecture

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written 2.7 years ago by binitamayekar ★ 6.6k

•   modified 2.7 years ago

Horizontal Microprogramming v/s Vertical Microprogramming

Sr. No.	Parameters	Horizontal Microprogramming	Vertical Microprogramming
1.	Degree of Parallelism	A higher degree of parallelism is allowed.	The low degree of parallelism is allowed.
2.	Number of Control Signals	If there is is 'n' number of degrees, n control signals will be enabled at a time.	Either 0 or 1 control signal will be enabled at a time.
3.	Basic Process	Control line is attached with every bit of the control field.	Each action will be performed with the help of a code, and this code will be translated into the individual control signals with the help of a decoder.
4.	Approach	This follows a sequential approach.	This follows the relative address approach.
5.	Sequence of Microinstruction	The horizontal microinstruction is used.	The vertical microinstruction is used.
6.	Control Words	This can support longer control words.	This can support shorter control words.
7.	ROM Encoding	It makes less use of ROM encoding.	It makes more use of ROM encoding so that it can reduce the control word's length.
8.	Hardware Requirements	No need for any type of additional hardware.	It requires additional hardware to generate the control signals. These types of hardware must be in the form of decoders.
9.	Flexibility	This control unit is less flexible.	This control unit is more flexible.
10.	Speed	This has a high speed.	This has a low speed.

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