Rabbit 2000 - RR (IX+D)

Instruction Reference Manual 87
Description
Rotates to the right with the Carry Flag, CF, the data whose address is:
• the data in word register HL, or
• the sum of the data in index register IX and a displacement d, or
• the sum of the data in index register IY and a displacement d.
Bit 0 moves to the CF, bits 1 through 7 move to the next lowest-order bit position, and the CF moves to bit 7.
See Figure 3 below.
RR (HL)
RR (IX+d)
RR (IY+d)
Opcode Instruction Clocks Operation
CB 1E RR (HL) 10 (2,2,1,2,3) {(HL),CF} = {CF,(HL)}
DD CB d 1E RR (IX+d) 13 (2,2,2,2,2,3) {(IX+d),CF} = {CF,(IX+d)}
FD CB d 1E RR (IY+d) 13 (2,2,2,2,2,3) {(IY+d),CF} = {CF,(IY+d)}
Flags ALTD I/O
S Z L/V C F R SP S D
• • L • • • •
Figure 3: The bit logic for the RR instruction.
CF70