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assume cs:code,ds:data,ss:stack
data segment
dw 0123h,0123h,0234h,0235h,2341h,1122h,3333h,233ah
data ends
stack segment
dw 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
stack ends
code segment
start mov ax,10h
mov ds,ax
mov ax,4c00h
int 21h
code ends
end start
mov bx, a
mov ds, bx
mov bx, 0
mov di, 30h-2 ;a段占20H字节,b段紧跟着a段,占10H字节
mov cx, 8
s: mov ax, [bx]
mov [di], ax
sub di, 2
add bx, 2
loop s
a segment
dw 1,2,3,4,5,6,7,8,9,0222h,0234h,0345h,0333h,0333h,0dh,0ah
a ends
b segment
dw 0,0,0,0,0,0,0,0
b ends
有错没
mov bx,7
mov cx,8
mov dx,0
mov ax,a
mov ds,ax
s: mov ds:[dx+24],[bx]
inc dx
add bx,-1
loop s