# PM Opc ROL

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## ROL = Rotate Left

Hex | Mnemonic | Cycles |
---|---|---|

CE 94 | ROL A | 12 |

CE 95 | ROL B | 12 |

CE 96 nn | ROL [N+#nn] | 20 |

CE 97 | ROL [HL] | 16 |

### Execute

A = Register A B = Register B [N+#nn] = Memory: (I shl 16) or (N shl 8) or #nn [HL] = Memory: (I shl 16) or HL

; ROL Ds ; ; Ds = Source/Destination Ds = (Ds SHL 1) OR (Ds SHR 7)

### Description

"8-Bits Destination" bits are rotated left by 1.

### Conditions

Zero: Set when result is 0

Carry: Set when bit 0 of the result is 1

Sign: Set when bit 7 of the result is 1

Overflow remain unchanged

### Examples

; A = 0x04ROL A; A = 0x08 ; F = (Zero=0):(Carry=0):(Sign=0)

; B = 0x45ROL B; B = 0x8A ; F = (Zero=0):(Carry=0):(Sign=1)

; B = 0x84ROL B; B = 0x15 ; F = (Zero=0):(Carry=1):(Sign=0)

; [HL] = 0x80ROL [HL]; [HL] = 0x01 ; F = (Zero=0):(Carry=1):(Sign=0)