程序集8086循环不起作用

Question

我有一个名为

的功能

call print_all

我想循环这个说10次。

mov bx,0
print_again:
call print_all
inc bx
cmp bx,20
jl print_again

它不起作用。为什么不比较。怎么了。

mov al,0
set_1:

complete_print[row_star+0],[col_star+0], star_char,color + 4
call print_star19
call delay_star
call clear
call print_star0
complete_print[row_star+19],[col_star+19], star_char,color + 5
mov currentindex,al
call delay_star
call clear
inc currentindex
mov al,currentindex
cmp al, 5
jl set_1

此代码甚至不循环5次。 ：（

currentindex db ?

del_star db 20

delay_star proc
  mov ah, 00
    int 1Ah
    mov bx, dx

jmp_delay:
int 1Ah
sub dx,bx
cmp dl, del_star
jl jmp_delay

ret
delay_star endp

这里的complete_print代码：

complete_print macro r,c,char,color
mov dh, r ;row
mov dl, c ;column

xor bh,bh
mov ah,02h
int 10h

    mov al, char
    mov bh, 0
    mov bl, color
    mov cx, 1
    mov ah, 09h
    int 10h 
endm