Question

求高手帮忙：：关于8086汇编语言中内存块中数值的移动的程序

请编写一个程序 编写的程序与下面这个程序实现功能相同
最好能把下面这个程序关键语句的作用注释一下
data segment
Source db 256 dup(055h)
Target db 256 dup(0aah)
data ends

code segment
assume cs:code, ds:data, es:data

start proc near

mov ax, data
mov ds, ax
mov es, ax

mov si, offset Source
mov di, offset Target
mov cx, 256

rep movsb

jmp $

code ends
end start

Answer 1

data segment
Source db 256 dup(055h)
Target db 256 dup(0aah)
data ends

code segment
assume cs:code, ds:data, es:data

start proc near

mov ax, data
mov ds, ax
mov es, ax

LEA SI,Source
LEA DI,Target
; mov si, offset Source
; mov di, offset Target
mov cx, 256
; rep movsb

next:
mov al,[si]
mov [di],al
inc si
inc di
loop next

jmp $

code ends
end start