[BX]和loop指令

[BX]和loop指令

[BX]和loop指令02

[BX]和loop指令03

assume cs:code
  code segment
      mov ax,0
      mov cx,123
     s:add ax,236
      loop s
      mov ax,4c00h
      int 21h
  code ends
end

assume cs:code 
code segment
     mov ax,0ffffh
     mov ds,ax
     mov bx,6
     mov al,[bx]
     mov ah,0
     mov dx,0

     mov cx,3
s:   add dx,ax
     loop s

     mov ax,4c00h
     int 21h
code ends
end

p指令直接执行完循环

[BX]和loop指令04

[BX]和loop指令05

assume cs:code
code segment 
      mov ax,0ffffh
      mov ds,ax
      mov bx,0

      mov dx,0

      mov cx,12

s:    mov al,[bx]
      mov ah,0
      add dx,ax
      inc bx
      loop s

      mov ax,4c00h
      int 21h
code ends
end

[BX]和loop指令06

assume cs:code
code segment
      mov ax,0
      mov ds,ax
      mov ds:[26h],ax

      mov ax,4c00h
      int 21h
code ends
end