a2-2.asm

汇编语言的设计

STACK SEGMENT STACK
	DW 64 DUP(?)
STACK ENDS

CODE SEGMENT
	ASSUME CS:CODE

START:	MOV CX,0005H
	MOV DI,3500H
A1:	MOV BL,0FFH
	MOV AL,[DI]
	CMP AL,3AH
 	JNB A2
	SUB AL,30H
	JB A2
	MOV BL,AL
A2:	MOV AL,BL
	MOV [DI+0AH],AL
	INC DI
	LOOP A1
A3:	JMP A3	
CODE ENDS
     END START