section 7 - Index of

EXAMPLE: MOVE BO,V: (R1)+BEFORE EXECUTIONB2 B1 BO55 4847 24 23 0IA FI 6 5 4 3 2 11 F E 0 C B AI7 023 o 23 0AFTER EXECUTION82 B1 BO55 4847 24 23 0IA F I 6 5 4 3 2 11 F E o C B AI7 023 o 23 0YMEMORY23 0YMEMORY23 0$2501 I------i$2500 I------i$2501 I--____ ~$2500 $ FED C 8 A15 0R1 '----'-----'R115 015 0N1 I XXXX I15 0M1 I $FFFFI15 0N1 I XXXX I15 0M1 I $FFFF IAssembler Syntax: (Rn)+Memory Spaces: P:, X:, V:, XV:, L:Additional Instruction Execution lime (Clocks): aAdditional Effective Address Words: aFigure 4-5 Address Register Indirect -Postincrement4.4.1.5 Postdecrement By Offset NnThe address of the operand is in the address register, Rn (see Table 4-1 and Figure 4-8).After the operand address is used, it is decremented by the contents of the Nn registerand stored in the same address register. The contents of the Nn register are unchanged.This mode cannot be used for making XV: memory references, but it can be used to modifythe contents of Rn without an associated data move.