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.data

time: .asciiz "00:00:00\n" 	# array hh:mm:ss

.text

#initialize all variables in hex

	la $t0, time		#start location of time
	li $t1, 0 		# subsec = initial loop value
	li $t2, 0 		# seconds = 0
	li $t3, 0 		# minutes = 0
	li $t4, 0 		# hours = 0
	#li $t5, 60		# set variable to set seconds 
				# and minutes against
	
	li $t8, 0		# initialize 10 second counter
	li $t9, 0		# initialize 10 min counter
	li $t6, 0		# set initialize 10 hr counter
	li $t7, 0		# ultimate hours counter
	
	
Loop:				# main loop

	addi $t1,$t1,1 		# increment subsec 
				# goal is to do this enough times
				# at 30 inst/sec to equal 1 sec
	beq $t1,10,inSec 	# if subsec = 30 or equivalent 
				
	j Loop			# loop back to beginning
	
inSec: 

	beq  $t2,9,incTenSec
	li $t1,4 #reset subsec, with an offset 4
	addi $t2,$t2,1 #increment seconds
	addi $s0,$t2,48 #add seconds to time address
	sb $s0, 7($t0) #save seconds byte
	la $a0, time # load address of time string to print
	li $v0, 4 # specify Print String service
	
	syscall
	
	#addi $t2,$t2,0 #increment seconds
	
	#beq  $t2,60,incMin #if seconds < 60 
	j Loop #Loop back to begining
	
incTenSec: #

	beq $t8,5, incMin
	li $t1, 1 #reset subsec, with offset
	li $t2,0
	addi $t8,$t8, 1 #add 10 seconds increment
	addi $s0,$t2,48 #add seconds to time address
	sb $s0, 7($t0) #save seconds byte
	addi $s0,$t8, 48 #add 10sec to time address 
	sb $s0, 6($t0) #save 10sec byte
	la $a0, time # load address of time string to print
	li $v0, 4 # specify Print String service
	
	syscall
	#li $t2, 0 #reset seconds
	
	
	j Loop	
	
incMin: #

	beq $t3,9,incTenMin #branch after 10 min
	li $t1,0 #reset subsec, with an offset
	li $t2,0 #reset seconds
	li $t8,0 #reset 10 seconds
	addi $t3,$t3,1 #increment minutes
	addi $s0,$t2,48 #add seconds to time address
	sb $s0, 7($t0) #save seconds byte
	addi $s0,$t8, 48 
	sb $s0, 6($t0)
	addi $s0,$t3, 48 #add minute to address
	sb $s0, 4($t0) #save minutes byte
	la $a0, time # load address of time string to print
	li $v0, 4 # specify Print String service
	
	syscall
	#li $t2, 0 #reset seconds
	#addi $t3,$t3, 1 #add minues increment
	#beq $t2,$t5, incMin
	#j Loop	
	
	j Loop #Loop back to begining
	
incTenMin: #

	beq $t9, 5, incHrs
	li $t1,0 #reset subsec
	li $t2,0 #reset seconds
	li $t8,0 #reset 10 sec
	li $t3,0 #reset minutes
	addi $t9,$t9,1 #increment 10 minutes
	addi $s0,$t2,48 #add seconds to time address
	sb $s0, 7($t0) #save seconds byte
	addi $s0,$t8, 48 #add 10sec to time address
	sb $s0, 6($t0) #save 10sec byte
	addi $s0,$t3, 48 #add minute to address
	sb $s0, 4($t0) #save minutes byte
	addi $s0,$t9, 48 #add 10min to address
	sb $s0, 3($t0) #save 10 minutes byte
	la $a0, time #load address of time string to print
	li $v0, 4 #specify print string service
	
	syscall
	
	j Loop

	
incHrs:

	beq $t4,9, incTenHrs 
	beq $t7,23,toZero
	li $t1,0 #reset subsec, with an offset
	li $t2,0 #reset seconds
	li $t8,0 #reset 10 sec
	li $t3,0 #reset minutes
	li $t9,0 #reset 10min
	addi $t4,$t4,1 #increment hours
	addi $t7,$t7,1 #increment ultimate hours counter
	addi $s0,$t2,48 #add seconds to time address
	sb $s0, 7($t0) #save seconds byte
	addi $s0,$t8, 48 #add 10sec to time address
	sb $s0, 6($t0) #save 10sec byte
	addi $s0,$t3, 48 #add minute to address
	sb $s0, 4($t0) #save minutes byte
	addi $s0,$t9, 48 #add 10min to address
	sb $s0, 3($t0) #save 10 minutes byte
	addi $s0,$t4,48  #add 1hr to address
	sb $s0, 1($t0) #save 1hr byte
	la $a0, time #load address of time string to print
	li $v0, 4 #specify print string service
	
	syscall
	
	#beq $t4,$t5,incHrs #if minutes < 60 
	j Loop #Loop back to begining
	
incTenHrs:

	
	li $t1,0 #reset subsec, with an offset
	li $t2,0 #reset seconds
	li $t8,0 #reset 10 sec
	li $t3,0 #reset minutes
	li $t9,0 #reset 10min
	li $t4,0 #reset hrs
	addi $t6,$t6,1 #increment 10hrs
	addi $t7,$t7,1 #increment ultimate hours
	addi $s0,$t2,48 #add seconds to time address
	sb $s0, 7($t0) #save seconds byte
	addi $s0,$t8, 48 #add 10sec to time address
	sb $s0, 6($t0) #save 10sec byte
	addi $s0,$t3, 48 #add minute to address
	sb $s0, 4($t0) #save minutes byte
	addi $s0,$t9, 48 #add 10min to address
	sb $s0, 3($t0) #save 10 minutes byte
	addi $s0,$t4,48  #add 1hr to address
	sb $s0, 1($t0) #save 1hr byte
	addi $s0,$t6, 48 #add 10hr to address
	sb $s0, 0($t0) #save 10hr byte
	la $a0, time #load address of time string to print
	li $v0, 4 #specify print string service
	
	syscall
	
	j Loop #Loop back to beginning
	
toZero:

	li $t1,0 #reset subsec, with an offset
	li $t2,0 #reset seconds
	li $t8,0 #reset 10 sec
	li $t3,0 #reset minutes
	li $t9,0 #reset 10min
	li $t4,0 #reset hrs
	li $t6,0 #reset 10hrs
	li $t7,0 #reset ultimate hours
	addi $s0,$t2,48 #add seconds to time address
	sb $s0, 7($t0) #save seconds byte
	addi $s0,$t8, 48 #add 10sec to time address
	sb $s0, 6($t0) #save 10sec byte
	addi $s0,$t3, 48 #add minute to address
	sb $s0, 4($t0) #save minutes byte
	addi $s0,$t9, 48 #add 10min to address
	sb $s0, 3($t0) #save 10 minutes byte
	addi $s0,$t4,48  #add 1hr to address
	sb $s0, 1($t0) #save 1hr byte
	addi $s0,$t6, 48 #add 10hr to address
	sb $s0, 0($t0) #save 10hr byte
	la $a0, time #load address of time string to print
	li $v0, 4 #specify print string service
	
	syscall
	
	j Loop #Loop back to beginning

	

	

#print and return to subsec
#print: #ASCII number char start at d48
#add $t0, $zero, $a0 # starting address of array
#jr $ra #return