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RR DE
RR HL     Rotate Right Through Carry     Rabbit 2000/3000/4000/5000 Instruction

Opcode	Instruction	Operation
FB	RR DE	{DE,CF} = {CF,DE}
FC	RR HL	{HL,CF} = {CF,HL}

Clocks	8-Bit Access	16-Bit Unaligned	16-Bit Aligned
Rabbit 2000/3000/4000	2	n/a	n/a
Rabbit 5000	2	2	2

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 DE or HL. Bit 0 moves to the C flag, bits 1 through 15 move to the next lowest-order bit position, and the C flag moves to bit 15. See Figure 11 below for an illustration.

Figure 11: The bit logic for RR instruction.