# PM Opc SHR

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## SHR = Shift Right

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

CE 8C | SHR A | 12 |

CE 8D | SHR B | 12 |

CE 8E nn | SHR [N+#nn] | 20 |

CE 8F | SHR [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

; SHR Ds ; ; Ds = Source/Destination Ds = Ds SHR 1

### Description

"8-Bits Destination" bits are shifted right by 1.

NOTE: This instruction can be used as an unsigned integer division by 2.

### Conditions

Zero: Set when result is 0

Carry: Set when the old bit 0 was 1

Sign: Set when bit 7 of the result is 1

Overflow remain unchanged

### Examples

; A = 0x04 (4)SHR A; A = 0x02 (2) ; F = (Zero=0):(Carry=0):(Sign=0)

; B = 0x45 (69)SHR B; B = 0x22 (34) ; F = (Zero=0):(Carry=1):(Sign=0)

; B = 0x84 (132)SHR B; B = 0x42 (66) ; F = (Zero=0):(Carry=0):(Sign=0)

; [HL] = 0x01 (1)SHR [HL]; [HL] = 0x00 (0) ; F = (Zero=1):(Carry=1):(Sign=0)