RRB A,BCDE
RRB A,JKHL     Rotate Right with A     Rabbit 4000 Instruction

Opcode	Instruction	Clocks	Operation
DD 7F	RRB A,BCDE	4 (2,2)	{A, BCDE} = {E, A, BCD}
FD 7F	RRB A,JKHL	4 (2,2)	{A, JKHL} = {L, A, JKH}

Flags				ALTD			IOI/IOE
S	Z	L/V	C	F	R	SP	S	D
-	-	-	-

Description

Rotates 8 bits to the right with A the data in BCDE or JKHL. For example, the data in B moves to C, while the data in C moves to D. The low-order byte moves to A and A moves to the high-order byte. See the figure below.

Figure 13: The bit logic of the "RRA 8,BCDE" instruction.