MC68030 Datasheet, PDF (69/602 Pages) Motorola, Inc – ENHANCED 32-BIT MICROPROCESSOR

Data Organization and Addressing Capabilities
The postindexed indirect mode (see Figure 2–12) uses the contents of An as an index to the
pointer list at the displacement. Register Xn is used as an index to the structure of data items
located at the address specified by the pointer. Figure 2–13 shows the preindexed indirect
addressing with outer displacement mode.
SYNTAX: ([bd,An],Xn)
POINTER LIST
bd
POSTINDEXED STRUCTURE
An
POINTER
Xn
DATA ITEM
Figure 2-12. Postindexed Indirect Addressing
SYNTAX: ([bd,An,Xn],od)
POINTER LIST
bd
An
Xn
STRUCTURE
od
POINTER
DATA ITEM
Figure 2-13. Preindexed Indirect Addressing with Outer Displacement
MOTOROLA
MC68030 USER’S MANUAL
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