Performs a RR A faster, and modifies the flags differently.
RRA
The Carry becomes the bit leaving on the right, H, N flags are reset, P/V, S, and Z are preserved.
4 t-states
RL,RLA,RLC,RLCA,RLD,RR,RRC,RRCA,RRD,SLA,SLL/SL1,SRA,SRL