ZiLOG Z80380 User Manual page 185

Z
ILOG
RR dst
← dst
Operation: tmp
dst(7) ← C
← dst(0)
C
dst(n) ← tmp(n+1) for n = 0 to 6
The contents of the destination operand are concatenated with the Carry flag and together
they are rotated right one bit position. Bit 0 of the destination operand is moved to the Carry
flag and the Carry flag is moved to bit 7 of the destination.
Flags: S: Set if the most significant bit of the result is set; cleared otherwise
Z: Set if the result is zero; cleared otherwise
H: Cleared
P: Set if parity of the result is even; cleared otherwise
N: Cleared
C: Set if the bit rotated from bit 0 was a 1; cleared otherwise
Addressing
Mode Syntax
R: RR R
IR: RR (HL)
X: RR (XY+d)
Field Encodings: r: per convention
y: 0 for IX, 1 for IY
DC-8297-03
dst = R, IR, X
Instruction Format
11001011 00011-r-
11001011 00011110
11y11101 11001011 ——d— 00011110
ROTATE RIGHT (BYTE)
Execute
Time Note
2
2+r
4+r I
™
Z380
U ' M
SER S ANUAL
RR
5-151