求助甲鱼哥

戏++

assume cs:codesg,ds:datasg,ss:stacksg
stacksg segment
dw 0,0,0,0,0,0,0,0
stacksg ends

datasg segment
db '1. display......'
db '2. brows........'
db '3. replace......'
db '4. modify.......'
datasg ends
codesg segment
start:
mov ax,stacksg
    mov ss,ax
mov sp,16
mov ax,datasg
mov ds,ax
mov bx,0   ;定义列

mov cx,4
s0:
push cx
mov si,0   ;定义列
mov cx,4
  s1:
   mov al,[bx+3+si] ;这里是定位到没个要索引的字母，每行取4个字母
   and al,11011111b ;实现大写转换
   mov [bx+3+si],al
   inc si
  loop s1
and bx,16
pop cx
loop s0
mov ax,4c00h
int 21h
codesg ends
end start


有个错误
Assembling: 12.asm
12.asm(29) : error A2070: invalid instruction operands
12.asm(31) : error A2070: invalid instruction operands

这是为啥呢

~逆天~

and bx,16应该是add bx,16

戏++

s1:        mov al,[bx+3+si]

根据提示好像是这里有错误