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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.20 ORH (Or Half-word Data of Source Register to Data in
Memory)
Takes the logical OR of the half-word data at memory address "Ri" and the half-word
data in "Rj", stores the results to the memory address corresponding to "Ri".
The CPU will not accept hold requests between the memory read operation and the
memory write operation of this request.
■ ORH (Or Half-word Data of Source Register to Data in Memory)
Assembler format: ORH Rj, @Ri
Operation: (Ri) or Rj → (Ri)
Flag change:
N: Set when the MSB (bit 15) of the operation result is "1", cleared when the MSB is "0".
Z: Set when the operation result is "0", cleared otherwise.
V and C: Unchanged
Execution cycles: 1 + 2a cycles
Instruction format:
NZVC
CC– –
MSB LSB
10010101 Rj Ri