RR b,BCDE
RR b,JKHL     Rotate Right Through Carry     Rabbit 4000 Instruction

Opcode	Instruction	Clocks	Operation
--	RR b,BCDE	4 (2,2)	{BCDE,CF} = {CF,BCDE}   b = b - 1 repeat while b != 0
DD 78	RR 1,BCDE	4 (2,2)	repeat the operation 1 time
DD 79	RR 2,BCDE	4 (2,2)	repeat the operation 2 times
DD 7B	RR 4,BCDE	4 (2,2)	repeat the operation 4 times
--	RR b,JKHL	4 (2,2)	{JKHL,CF} = {CF,JKHL}   b = b - 1 repeat while b != 0
FD 78	RR 1,JKHL	4 (2,2)	repeat the operation 1 time
FD 79	RR 2,JKHL	4 (2,2)	repeat the operation 2 times
FD 7B	RR 4,JKHL	4 (2,2)	repeat the operation 4 times

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

Description

Rotates to the right with the C flag the data in BCDE or JKHL.

Figure 10: The bit logic of the RR instruction.

This operation happens b times.