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我正在尝试编写一个 NASM 程序来乘以 2 个 8 位数字，但我没有得到超过 15 个的答案。我是一个初学者，我真的没有它真正的工作......请帮助......

section .data
msg1:db "Enter the numbers:"
len1:equ $-msg1
msg2:db "Product is: "
len2:equ $-msg2

section .bss
a:resb 2
b:resb 2
p1:resb 1
p2:resb 1

section .text
global _start
_start:mov eax,4
   mov ebx,1
   mov ecx,msg1
   mov edx,len1
   int 80h

   mov eax,3
   mov ebx,0
   mov ecx,a
   mov edx,2
   int 80h

   mov eax,3
   mov ebx,0
   mov ecx,b
   mov edx,2
   int 80h

   mov eax,4
   mov ebx,1
   mov ecx,msg2
   mov edx,len2
   int 80h

   clc
   mov ecx,4
   mov al,[b]
   sub al,'0'
   mov ah,[a]
   sub ah,'0'
   shl ah,4
back:mov bl,al
     and bl,01h
     jz ahead
     add al,ah
 ahead:ror al,1
       loop back
       and eax,0000000fh
       daa
       mov ebp,eax
       and eax,000000f0h
       shr eax,4
       add eax,'0'
       mov [p1],eax
       mov eax,4
       mov ebx,1
       mov ecx,p1
       mov edx,1
       int 80h

       mov eax,ebp
       and eax,0000000fh
       add eax,'0'
       mov [p2],eax

       mov eax,4
       mov ebx,1
       mov ecx,p2
       mov edx,1
       int 80h

       mov eax,1
       mov ebx,0
       int 80h

大多数代码实际上是复制的。并且在互联网上找不到太多关于 NASM 程序的信息

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