Write assembly codes by using nios II instruction set to cal

Solution

DATA SEGMENT
A DB 5
DATA ENDS
CODE SEGMENT
         ASSUME DS:DATA,CS:CODE
START:
      MOV AX,DATA
      MOV DS,AX
      MOV AH,00
      MOV AL,A
L1: DEC A
      MUL A
      MOV CL,A
      CMP CL,01
      JNZ L1
      MOV AH,4CH
      INT 21H
CODE ENDS
END START