居然显示不出负数来，悲剧,该怎么解决

.386
.model flat,stdcall


include kernel32.inc 
includelib kernel32.lib
include msvcrt.inc
includelib msvcrt.lib



.data           
printStr2 byte "dl:al=%d",0dh,0ah,0

var1 word ?


.code
main proc


mov eax,0

mov al,-1

add al,-2

adc dl,0

mov byte ptr var1,al
mov byte ptr var1+1,dl

movzx eax, var1

invoke crt_printf, addr printStr2,eax

invoke ExitProcess,0;
main endp



end main