Structure of control word in control memory

Question

What is the structure of control word for Horizantal microprogrammed control unit?

<Conditional branch bit, flag bits, contol field, next address> 

                               OR

<log(Conditional branch bits), log(flag bits), contol field, next address> 

Answer 1

In horizontal micro programmed control unit in control word 1bit store for each control signal 

if system has 150 signals in each control word =150 

so structure of  word is like that 

<log(conditional branch bits),log (flag bits),control field ,next address>

Comments

@saykatamkeen can you provide any standard resource confirming this?

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yes geeksforgeeks and one of the coa educator vishpdeep gothi

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@saykatamkeen Sir, why are we doing log() for flags , 

what if we need more than one flag to check the condition.

ex- For overflow condition to check we need Cin and Cout, Suppose they are present as flag then how can we access both because taking log we are assuming that any instruction will need only one flag at a time.

 

​​​​​​Please clear the confusion!