Instruction Reference Manual
127
Description
Rotates to the right the data whose address is:
•
the data in HL, or
•
the sum of the data in IX and a displacement d, or
•
the sum of the data in IY and a displacement d.
Each bit in the register moves to the next lowest-order bit position (bit 7 moves to bit 6, etc.) while bit 0
moves to both bit 7 and the C flag. See figure below.
Figure 6: The bit logic of the RRC instruction.
RRC (HL)
RRC (IX+
d
)
RRC (IY+
d
)
Opcode
Instruction
Clocks
Operation
CB 0E
RRC (HL)
10 (2,2,1,2,3)
(HL) = {(HL)[0],(HL)[7,1]};
CF = (HL)[0]
DD CB
d
0E
RRC (IX+
d
)
13 (2,2,2,2,2,3)
(IX +
d
) = {(IX +
d
)[0],
(IX +
d
)[7,1]};
CF = (IX +
d
)[0]
FD CB
d
0E
RRC (IY+
d
)
13 (2,2,2,2,2,3)
(IY +
d
) = {(IY +
d
)[0],
(IY +
d
)[7,1]};
CF = (IY +
d
)[0]
Flags
ALTD
I/O
S
Z
L/V
C
F
R
SP
S
D
•
•
L
•
•
•
•
7
0
CF
Summary of Contents for 2000
Page 2: ...ii Rabbit 2000 3000 Microprocessor...
Page 4: ...iv Rabbit 2000 Microprocessor...
Page 16: ...12 Rabbit 2000 3000 Microprocessor...
Page 164: ...160 Instruction Reference Manual...
