
5-153
Z380
™
USER'S MANUAL
ZILOG
DC-8297-03
RRA
ROTATE RIGHT (ACCUMULATOR)
RRA
Operation: tmp ← A
A(7) ← C
C ← A(0)
A(n) ← tmp(n+1) for n = 0 to 6
The contents of the accumulator are concatenated with the Carry flag and together they are
rotated right one bit position. Bit 0 of the accumulator is moved to the Carry flag and the Carry
flag is moved to bit 7 of the accumulator.
Flags: S: Unaffected
Z: Unaffected
H: Cleared
P: Unaffected
N: Cleared
C: Set if the bit rotated from bit 0 was a 1; cleared otherwise
Addressing Execute
Mode Syntax Instruction Format Time Note
RRA 00011111 2
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