asdf.rar_GW48_GW48-CK_gw48-_gw48-pk

STACK1 SEGMENT STACK USE16 DB 64 DUP(?) STACK1 ENDS DATA SEGMENT USE16 MES0 DB 'This is tangdu speaking!$' MES1 DB 'Show this sentence as hex:$' BUF DB 65 DUP(?) DATA ENDS CODE SEGMENT USE16 ASSUME CS:CODE,DS:DATA START: MOV AX,DATA MOV DS,AX MOV DX,OFFSET MES0 ;Show "This is tangdu speaking!" MOV AH,09H INT 21H CALL KENTER MOV DX,OFFSET MES1 ;Show Sentence as hex MOV AH,09H INT 21H CALL KENTER CALL SAHEX MOV DX,OFFSET BUF MOV AH,09H INT 21H CALL KENTER MOV AH,4CH INT 21H SAHEX PROC NEAR CBYTE =24 PUSHAD ;将所有32位寄存器压栈 MOV DI,OFFSET MES0 MOVZX EDI,DI ;零扩展指令 MOV AX,DATA MOV GS,AX ;使用GS段 MOV SI,OFFSET BUF MOVZX ESI,SI MOV ECX,CBYTE C1: MOV AL,DS:[EDI] AND AL,0F0H ;取高4位 SHR AL,4 CMP AL,0AH ;是否是A以上的数 JB C2