Intel 80C186EA User Manual page 60

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Opcode
Opcode
Based addressing provides a simple way to address data structures that may be located in different
places in memory (see Figure 2-16). A base register can be pointed at the structure. Elements of
the structure can then be addressed by their displacements. Different copies of the same structure
can be accessed by simply changing the base register.
OVERVIEW OF THE 80C186 FAMILY ARCHITECTURE
Mod R/M
Figure 2-14. Register Indirect Addressing
Mod R/M
Figure 2-15. Based Addressing
BX
or
BP
or
SI
or
DI
Displacement
BX
or
+
BP
EA
EA
A1017-0A
A1018-0A
2-31

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