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DB 100 DUP(?) STA ENDS CODES SEGMENT ASSUME CS:CODES,DS:DATAS START: MOV AX,DATAS MOV DS,AX LEA DX,BUF MOV AH,9 INT 21H AND CX,0 TO: MOV AH,1 INT 21H CMP AL,39。$39。 JZ SHOW CMP AL,39。a39。 JB Y1 CMP AL,39。z39。 JA Y1 SUB AL,20H Y1: INC CX PUSH AX JMP TO SHOW: POP DX