DEC - 8086

Decrements Registrer or memory value by 1.
Algorithm : 
operand = operand - 1

Syntax

DEC REG
DEC memory

Example

MOV AL, 255  ; AL = 0FFh (255 or -1)
DEC AL       ; AL = 0FEh (254 or -2)
RET

Output / Return Value

Limitations

Alternatives / See Also

Reference