GATE CSE 2002 | Question: 2.7

Question

Horizontal microprogramming:

• A. does not require use of signal decoders
• B. results in larger sized microinstructions than vertical  microprogramming
• C. uses one bit for each control signal
• D. all of the above

Comments

Selected answer reference link

https://web.archive.org/web/20180219000846/http://www.cs.virginia.edu/~cs333/notes/microprogramming.pdf

Answer 1

Option (D). All statements are true.

Reference: https://web.archive.org/web/20180219000846/http://www.cs.virginia.edu/~cs333/notes/microprogramming.pdf

Comments

https://web.archive.org/web/20180219000846/http://www.cs.virginia.edu/~cs333/notes/microprogramming.pdf

Answer 2

Horizontal micro programming:

 1)  Each control signal itself  present in control word So no need of signal decoders, To represent one control  signal we need 1-bit  so A, C is true

 2)  In Vertical micro programming control word  contain log(no of control signals) bits to represent control signals.  

 Ex: suppose 16 control signals are there, In HmP  16 bits, in VmP  log16 = 4 bits are required

 so B is true   

 Finally Option D is Answer