sy13-1.asm

以查询方式将数据段中BUFFER开始的16个字节单元的数据从16550发送

SSEG SEGMENT STACK
     DB 100 DUP(?)
SSEG ENDS

CODE SEGMENT
ASSUME  CS:CODE
START:	MOV DX,980CH
	MOV AL,80H
	OUT DX,AL

	MOV DX,9800H
	MOV AL,0CH
	OUT DX,AL
	MOV DX,9804H
	MOV AL,00H
	OUT DX,AL
				
	MOV DX,980CH
	MOV AL,1BH
	OUT DX,AL
				
	MOV DX,9804H
	MOV AL,00H
	OUT DX,AL
				
SEND:	MOV DX,9800H
	MOV AL,0D7H
	OUT DX,AL
	MOV DX,9814H
WAIT:	IN AL,DX
	AND AL,01H
	JZ WAIT
	JMP SEND

	MOV AH,4CH
	INT 21H
				
CODE ENDS
END START