Micro-Programming

Question 1

A
10, 3, 1024
B
8, 5, 256
C
5, 8, 2048
D
10, 3, 512
       Computer-Organization       Micro-programming       Gate-2004
Question 1 Explanation: 
Processed width = 26 bits
Micro process field width = 13 bits
MUX consists of 8 state bits, then it require 3 inputs to select input line.
No. of bits for next address field = 26 - 13 - 3= 10
For 10 bit addressing, we require 210 memory size
Size (X, Y) = 10, 3
Question 2
Arrange the following configuration for CPU in decreasing order of operating speeds: Hard wired control, vertical microprogramming, horizontal microprogramming.
A
Hard wired control, vertical micro-programming, horizontal micro- programming.
B
Hard wired control, horizontal micro-programming, vertical micro- programming.
C
Horizontal micro-programming, vertical micro-programming, Hard wired control.
D
Vertical micro-programming, horizontal micro-programming, hard wired control.
       Computer-Organization       Micro-Programming       Gate-1999
Question 2 Explanation: 
Hardwired control involves only hardware which is definitely faster than microprogramming approach.
Now between horizontal and vertical microprogramming, the signals in vertical microprogramming are in encoded form which has to be decoded first using decoder. So, horizontal microprogramming is faster than vertical microprogramming.
There are 2 questions to complete.