RLB A,BCDE
RLB A,JKHL     Rotate Left with A     Rabbit 4000 Instruction

Opcode	Instruction	Clocks	Operation
DD 6F	RLB A,BCDE	4 (2,2)	{A,BCDE} = {BCDE,A}
FD 6F	RLB A,JKHL	4 (2,2)	{A,JKHL} = {JKHL,A}

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

Description

Rotates BCDE or JKHL to the left with A. The bits are rotated 8 at a time, as illustrated in the figure below. Bits 0 through 23 are shifted 8 bits to bit positions 8 through 31. Bits 31 through 24 are shifted to A and A is shifted to bits 7 through 0.

Figure 4: The bit logic of the "RLB A, BCDE" instruction