RL r     Rotate Left Through Carry     Rabbit 2000/3000/4000 Instruction

Opcode	Instruction	Clocks	Operation
----	RL r	4 (2,2)	{CF,r} = {r,CF}
CB 17	RL A	4 (2,2)	{CF,A} = {A,CF}
CB 10	RL B	4 (2,2)	{CF,B} = {B,CF}
CB 11	RL C	4 (2,2)	{CF,C} = {C,CF}
CB 12	RL D	4 (2,2)	{CF,D} = {D,CF}
CB 13	RL E	4 (2,2)	{CF,E} = {E,CF}
CB 14	RL H	4 (2,2)	{CF,H} = {H,CF}
CB 15	RL L	4 (2,2)	{CF,L} = {L,CF}

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

Description

Rotates r (any of the register A, B, C, D, E, H, or L) to the left with the C flag. Each bit in the register moves to the next highest-order bit position (bit 0 moves to bit 1, etc.) while the C flag moves to bit 0 and bit 7 moves to the C flag. See figure below.

Figure 3: The bit logic of the RL instruction.