80C186EB/80C188EB Microprocessor User's Manual - CEUNES

OVERVIEW OF THE 80C186 FAMILY ARCHITECTUREOpcodeMod R/MBXorBPorSIorDIEAA1017-0AFigure 2-14. Register Indirect AddressingOpcode Mod R/M DisplacementBXor +BPEAA1018-0AFigure 2-15. Based AddressingBased addressing provides a simple way to address data structures that may be located in differentplaces in memory (see Figure 2-16). A base register can be pointed at the structure. Elements ofthe structure can then be addressed by their displacements. Different copies of the same structurecan be accessed by simply changing the base register.2-31