0100nnnn00011011
op1 ← SignExtend32(Rn);
address ← ZeroExtend32(op1);
OCBP(address);
value ← ZeroExtend8(ReadMemory8(address));
t ← INT (value = 0);
value ← value ∨ (1 << 7);
WriteMemory8(address, value);
T ← Bit(t);