MOV AX,0600H
  MOV BH,07
  MOV CX,0
  MOV DX,184F
  INT 10H
  MOV AH,00
  MOV AL,06
  INT 10H
  MOV CX,50 
  MOV DX,50 
BACK: MOV AH,0C 
  MOV AL,01 
  INT 10H
  INC CX 
  CMP CX,200 
  JNZ BACK