section 7 - Index of

ORI OR Immediate with Control Register ORIOperation:Assembler Syntax:#xx+D -4 D OR(I) #xx,Dwhere + denotes the logical inclusive OR operatorDescription: Logically OR the 8-bit immediate operand (#xx) with the contents of thedestination control register D and store the result in the destination control register. Thecondition codes are affected only when the condition code register is specified as thedestination operand.Restrictions: The ORI #xx,MR instruction cannot be used Immediately before anENDDO or RTI instruction and cannot be one of the last three instructions in a DO loop(at LA-2, LA-1, or LA).Example:OR #$8,MR;set scaling mode bit 81 to scale upBefore ExecutionMRI~ ________$0_3 ______ ~MR~I _______After Execution$O_B ______ ~Explanation of Example: Prior to execution, the 8-bit mode register (MR) contains thevalue $03. The OR #$8,MR instruction logically ORs the immediate 8-bit value $8 withthe contents of the mode register and stores the result in the mode register.Condition Codes:I LF I OM I T I·· I 81 I 80 I 11 I 10 Is I L I E I u I N I z v15 14 13 12 11 10 9 8 7 6 5 4 3 2 o~I