你不能真的去做一个新的系列。
通过打印这2个字节13和10，您可以从当前所在的行移动到下一行：

mov  bx, 0007h  ; BH is DisplayPage, BL is GraphicsColor
mov  ax, 0E0Dh  ; AH is Teletype, AL is CarriageReturn
int  10h
mov  al, 0Ah    ; AL is Linefeed 
int  10h

你现在可以做的是清空你到达的那条线：

mov  cx, 80     ; Length of the row (assuming screen is 80x25)
mov  bx, 0007h  ; BH is DisplayPage, BL is ColorAttribute
mov  ax, 0920h  ; AH is WriteCharacter, AL is SpaceCharacter
int  10h