NEC 78K/0 Series - Manual (Page 71)

71
CHAPTER 5 EXPLANATION OF INSTRUCTIONS
User's Manual U12326EJ4V0UM
Increment
INC
Byte Data Increment
[Instruction format] INC dst
[Operation] dst
← dst + 1
[Operand]
Mnemonic Operand(dst)
INC r
saddr
[Flag]
Z AC CY
Ч Ч
[Description]
• The destination operand (dst) contents are incremented by only one.
• If the increment result is 0, the Z flag is set (1). In all other cases, the Z flag is cleared (0).
• If the increment generates a carry for bit 4 out of bit 3, the AC flag is set (1). In all other cases, the AC flag
is cleared (0).
• Because this instruction is frequently used for increment of a counter for repeated operations and an indexed
addressing offset register, the CY flag contents are not changed (to hold the CY flag contents in multiple-
byte operation).
[Description example]
INC B; The B register is incremented.