【汇编算法】新人求助，初学微机有问题请大神指导

1
DA1 DB 00H,01H,02H,03H,04H,05H,06H,07H,08H,09H
DA2 DB 10 DUB(?)
COUNT EQU DA2-DA1
┋
LEA SI,DA1
LEA DI,DA2
MOV CX,COUNT
LOP1: MOV AL,[SI]
OR AL,48
MOV [DI],AL
INC SI
INC DI
LOOPLOP1
2
DA1 DB 00H,01H,02H,03H,04H,05H,06H,07H,08H,09H
DA2 DB 10 DUB(?)
COUNT EQU DA2-DA1
┋
MOV SI, OFFSET DA1
MOV DI,OFFSET DA2
MOV CX,COUNT
LOP1: MOV AL,[SI]
ADD AL,30H
MOV [DI],AL
INC SI
INC DI
LOOPLOP1
这两段程序的功能是什么？有何区别？