| Hex | Mnemonic | Cycles |
|---|---|---|
| DF | UPCK | 2 |
A = (8-bits) Register A
B = (8-bits) Register B
; UPCK
B = A SRL 4
A = A AND 0x0F
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.
None
; A = 0x21
UPCK
; A = 0x01
; B = 0x02