Mine

MyISR PROC FAR
  ; Do something in here
  MOV     AL , 'X'
  MOV     AH , 0Eh
  INT     10h
  IRET
MyISR ENDP
; ------------------------------

START:   


  ASSUME  DS:@DATA, CS:@CODE, SS:@STACK
  MOV     AX , @DATA
  MOV     DS , AX

  PUSH    ES
  XOR     AX , AX
  MOV     ES , AX
  MOV     WORD PTR ES:[0000h] , OFFSET MyISR
  MOV     WORD PTR ES:[0000h+2] , SEG MyISR
  POP     ES
  
  XOR     AX , AX
  MOV     CX , 000Ah
  DIV     CX