Microprogrammed Control Q.9

9What is the 6th control step involved in completely executing the instructions "ADD R1,R2" (in the CPU with single bus organization shown in question 7)?
1. PCout , MARin, Read, Select=0, Add, Zin
2. Zout , PCin , WMFC
3. MDRout, IRin
4. R2out, Yin
5. R1out, Select=1, Add, Zin
6.____________________

Option : D
Explanation :

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