## UNPACK = Unpack Nibbles

Hex | Mnemonic | Cycles
--- | --- | ---
DF | UNPACK | 8

### Execute

    A        =  (8-Bits) Register A
    B        =  (8-Bits) Register B

    ; UNPACK

    B = A SHR 4
    A = A AND 0x0F

### Description

Unpack byte in register A into 2 nibbles, storing them into register A and B.

Register A receive the lower nibble and register B receive the higher nibble.

### Conditions

None

### Examples

    ; A = 0x21
    UNPACK
    ; A = 0x01
    ; B = 0x02

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