Microprogrammed Control Q.9

0. What 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.____________________

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