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In the following based scaled indexed addressing mode with displacement instruction,$ADD\:\:EAX\:\: [(10[R_{IDX}])], [R_{BASE}]20$,
the effective address is:

  1. $EA = (10+R_{IDX})+(20+R_{BASE})$
  2. $EA = (10+R_{IDX})+(20*R_{BASE})$
  3. $EA = (10*R_{IDX})+(20+R_{BASE})$
  4. $EA = (10*R_{IDX})+(20*R_{BASE})$
asked in CO & Architecture by Boss (15.3k points)
edited by | 49 views

1 Answer

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As the name suggests, it is $(base+displacement)+(scale*index)$ addressing mode.
answered by Boss (15.3k points)
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