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datasegmentstr1dbghorg4str2dbabcd$adrdwstr2dataendscodesegmentassumecs:code,ds:datastart:movax,datamovds,axmovbx,str2-str1-4；0movdl,byteptr[bx]movah,2int21hmovdl,byteptradr；4adddl,30hmovah,2int21hmovdx,adr；4movah,9int21hmovah,4chint21hcodeendsendstart最终显示结果为:g4abcd