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

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. $EA = (10*R_{IDX})+(20*R_{BASE})$
edited | 49 views

As the name suggests, it is $(base+displacement)+(scale*index)$ addressing mode.

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