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assume cs:codesg,ss:stacksg,ds:datasg
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
mov cx,4
s0: push cx
mov si,0
mov cx,4
s: mov al,[bx+3+si]
and al,11011111b
mov [bx+3+si],al
inc si
loop s
add bx,16
pop cx
loop s0
mov ax,4c00h
int 21h
codesg ends
#########################################################
D:\resource\folder>masm 1.txtMicrosoft (R) MASM Compatibility DriverCopyright (C) Microsoft Corp 1993. All rights reserved.
Invoking: ML.EXE /I. /Zm /c /Ta 1.txt
Microsoft (R) Macro Assembler Version 6.15.8803 Patched for you by promethee [ECL] in the year 2001 - enjoyCopyright (C) Microsoft Corp 1981-2000. All rights reserved.
Assembling: 1.txt1.txt(16) : error A2008: syntax error : in instruction1.txt(25) : error A2070: invalid instruction operands1.txt(27) : error A2070: invalid instruction operands
这是为什么呢?
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