Question: (a) What are the conditions an SM chart must satisfy in order to realize it using single-address microprogramming with a counter, a ROM, and a

(a) What are the conditions an SM chart must satisfy in order to realize it using single-address microprogramming with a counter, a ROM, and a multiplexer as in Fig 5-33?

Microprogram ROM (Control store) TEST NST OUTPUT Counter Data Load Count Inputs, Next MUX state (true) Load/Count'

Figure 5-33: Microprogrammed System with Single- Address Microcode

(b) Give the modified SM chart and the required state assignment if the SM chart of Problem 5.18 is realized with this kind of microprogramming.

X1 X2 X3 SJZ, X2 S/Z3 X,

SM chart of Problem 5.18

Microprogram ROM (Control store) TEST NST OUTPUT Counter Data Load Count Inputs, Next MUX state (true) Load/Count' X1 X2 X3 SJZ, X2 S/Z3 X,

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