人生第一能显示字符的汇编留念

DATA SEGMENT
	DB 'TEST ASM'
DATA ENDS

CODE SEGMENT
	ASSUME CS:CODE,DS:DATA	
	START:
	MOV AX,DATA
	MOV DS,AX
	MOV AX,0B800H
	MOV ES,AX
	MOV DI,0H
	MOV SI,0H
	MOV CX,8H
	S:
	MOV AX,[DI]
	MOV ES:[SI],AX
	INC SI
	MOV DX,14H
	MOV ES:[SI],DX
	INC SI
	INC DI
	LOOP S
	MOV AX,4C00H
	INT 21H
CODE ENDS
END

DATA SEGMENT
	DB 'abcdefa',0
DATA ENDS

CODE SEGMENT
	START:
	MOV AX,DATA
	MOV DS,AX
	MOV CX,8
	MOV DX,0B800H
	MOV ES,DX
	MOV SI,0
	MOV DI,0
	CALL R
	MOV AX,4C00H
	INT 21H
	R:
	S:
	JCXZ T
	AND BYTE PTR [DI],11011111B
	MOV AX,[DI]
	MOV ES:[SI],AX
	MOV AX,14H
	INC SI
	MOV ES:[SI],AX
	INC SI
	INC DI
	LOOP S
	T:RET
CODE ENDS
END START