# Overwrites existing exception handler
        .ktext 0x80000180
        .set   noat     	# tell assembler not to use $at (assembler temporary)
       	                	# and hence not to complain when we do
        move   $k0, $at 	# save $at in $k0
                        	# $k0 and $k1 are reserved for
                        	# OS and Exception Handling
                        	# programmer should not use them, so not saved
        .set   at       	# tell assembler it may use $at again

        li    $a0, 0xFFFF0004 	# Receiver data address (interrupt based, so don't need to check Receiver control)
        lw    $v0, 0($a0)     	# Receiver data
        addi $t1,$0,'x'
	addi $t2,$0,'p'
	addi $t3,$0,'o'
	addi $t4,$0,'e'
	addi $t5,$0,'f'
	la $t6,player1win
	la $t7,player2win
	la $t8,printtabuleiro
	la $t9,printwinsandpoints
	#lb $t1,0($t0) 		#x
	#lb $t2,4($t0)		#p
	#lb $t3,8($t0)		#o
	#lb $t4,12($t0)		#e
	#lb $t5,16($t0)		#f

	loopx:	bne $t1,$v0,loopp	#primeiro vencedor ganha
		jalr $t6
	loopp:	bne $t2,$v0,loopo 	#estado atual do tabuleiro
		jalr $t8
	loopo:  bne $t3,$v0,loope	#segundo vencedor ganha
		jalr $t7
	loope:  bne $t4,$v0,loopf	#numero de partidas ganhas
		jalr $t9
	loopf:  bne $t5,$v0,loop6 	#finalizar programa
		li $v0,10
		syscall
	loop6: li $v0,10
		syscall

	eret  			# return from exception, PC <- EPC

	.text
	.globl main
main:
        li    $a0, 0xFFFF0000	# Receiver control
        lw    $t0, 0($a0)
        ori   $t0, 0x02		# set bit 1 to enable input interrupts
                              	# such a-synchronous I/O (handling of keyboard input in this case)
                              	# this is much more efficient than the "polling" we use for output
                              	# In particular, it does not "block" the main program in case there is no input
        sw     $t0, 0($a0)    	# update Receiver control

        mfc0   $t0, $12  	# load coprocessor0 Status register
        ori    $t0, 0x01 	# set interrupt enable bit

forever:

        j forever
player1:
	#Imprime a label player1_msg
	li $v0,4
	la $a0,player1_msg
	syscall
	li $v0,5	#Scan da posição
	syscall
	addi $v0,$v0,-1	#remove 1, para poder ser de 1-9 e não de 0-8(input mais intuitivo)
	mul $t0,$v0,4	#multiplica por 4 por causa da memora c inteiros saltar de 4 em 4
	move $a0,$v0
	jal posicaovalida
	beq $v0,0,posinvalidap1
	li $t1,1 #t1=1=>x
	sw $t1, tabuleiro($t0)	#guarda na posição obtida do output
	jal printtabuleiro
	j player2