NEC 78K/0 Series User Manual page 80

ROR4
[Instruction format]
[Operation]
[Operand]
Mnemonic
ROR4 [HL]
Note Specify an area other than the SFR area as operand [HL].
[Flag]
Z AC
[Description]
• The lower 4 bits of the A register and the 2-digit data (4-bit data) of the destination operand (dst) are rotated
to the right.
The higher 4 bits of the A register remain unchanged.
[Description example]
ROR4 [HL]; Rightward digit rotation is executed with the memory contents specified by the A and HL registers.
Before Execution
After Execution
80
CHAPTER 5 EXPLANATION OF INSTRUCTIONS
ROR4 dst
← (dst) ← A
A , (dst)
3-0 3-0 7-4
Operand(dst)
Note
CY
7 4 3 0
A
A
7 4 3
1010 0011
1010 0101
User's Manual U12326EJ4V0UM
← (dst)
, (dst)
3-0 3-0 7-4
7 4 3
dst
(HL)
0 7 4 3 0
1100 0101
0011 1100
Rotate Right Digit
Digit Rotation to the Right
0