运行汇编字母大小写转换

实验3

1.1详细设计

.model small

.stack 64

.databuf1 db'Input String:','$'m=255buf2 db mdb0dbmdup(0)

.codestart: mov ax,@datamov ds,axc all hto 1c all hto2call hto3c all hto4lea dx,buf2[2]mov ah,09hint 21hmov ax,4c00hint 21hhto 1 proclea dx,buf1mov ah,09hint 21hrethto1 endphto2 proclea dx,buf2mov ah,0Ahint 21hrethto2 endphto3 procmov dl,0Dhmov ah,02hint 21hmov dl,0Ahmov ah,02hint 21hret

hto3 endphto4 procmov bx,2mov dl,buf2[1]mov dh,0mov cx,dxt1: cmp buf2[bx],'a'jb dispcmp buf2[bx],'z'ja dispsub buf2[bx],20hdisp:inc bxloop t1mov bx,dxadd bx,2mov buf2[bx],24hrethto4 endpend start

1.2运行结果