Rra rotate right (accumulator) – Zilog Z80380 User Manual
Page 187
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5-153
Z380
™
U
SER
'
S
M
ANUAL
Z
ILOG
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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