Suppose that we change the ADD routine listed in Table 7-2 to the following two microinstructions. ADD:

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Suppose that we change the ADD routine listed in Table 7-2 to the following two microinstructions. 

ADD:    READ     I     CALL      INDR2 

             ADD      U    JMP        FETCH

What should be subroutine INDR2? 

Table 7-2

Label ADD: BRANCH: OVER: STORE: EXCHANGE: FETCH: TABLE 7-2 Symbolic Microprogram (Partial) Microoperations CD

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