assume cs:code,ds:data
data segment
x db ?
y db ?
a db ?
data ends
code segment
start:
mov ax,data
mov ds,ax
mov al,x
mov bl,y
mov a,0
cmp al,0
jge next1
cmp bl,0
jl next2
mov a,1
jmp exit
next1:
cmp bl,0
jge next2
mov a,-1
jmp exit
next2:
mov a,0
exit:
mov ax,4c00h
int 21h
code ends
end start
这段代码表示什么意思啊
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