Shri vishnu engineering college for women:: bhimavaram department of information technology
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ITIIBTechIISemLecCOA
0910-ComputerSystemOverview02
Displacement
Addressing
Avery powerful mode of addressing combines the capabilities of direct addressing and register indirect addressing.
We will refer to this as
displacement
addressing
EA = AR) Displacement addressing requires that the instruction
have two address fields
, at least one of which is explicit. The value contained in one address field (value = A) is used directly.
The other address field
, or an implicit
reference based on opcode
, refers to a register whose contents are added to A to produce the effective address. We will describe three of the most common uses
of displacement addressing
•
Relative addressing
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