NEC 78K/0 Series User Manual page 74

DECW
[Instruction format]
[Operation]
[Operand]
Mnemonic
DECW rp
[Flag]
Z AC
[Description]
• The destination operand (dst) contents are decremented by only one.
• Because this instruction is frequently used for decrement of a register (pointer) used for addressing, the Z,
AC and CY flag contents are not changed.
[Description example]
DECW DE; The DE register is decremented.
74
CHAPTER 5 EXPLANATION OF INSTRUCTIONS
DECW dst
dst ← dst – 1
Operand (dst)
CY
User's Manual U12326EJ4V0UM
Decrement Word
Word Data Decrement