Base Addressing For Indexing

• “Base/offset addressing” gets its name from the idea that a series of addresses could be created from a fixed base and a series of offsets:

4100 + 0 = 4100 4100: c

4100 + 4 = 4104 4104: 2933c400

4100 + 8 = 4108 4108: ffffffff

4100 + 12 = 4112 4112: 0

...

Base

Offset

Effective Address

Conclusion: Keep offset in the rs register

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