#Registers are all cleared before this part
####################
# Set up mem locs  #
####################

li $s0, 0xBF886100  #tri-state mem_loc
li $s1, 0xBF8860F0  #set mem_loc for ODCE
li $s2, 0xBF886110  #mem_loc for pmod pins
li $s3, 0xBF886010  #mem_loc for button head
li $s4, 0xBF806200  #load adress of UARTB
sw $t0, 0x00($s4)   #clear UARTB
sw $t0, 0x10($s4)   #clear state
sw $t0, 0x20($s4)   #clear Tx
sw $t0, 0x30($s4)   #clear Rx
########################
#INITAL'Z    UART  PROC#
########################
ori $t0, $zero, 0x8B00  #load set bits for UARTB into t0
sw $t0, 0x00($s4)           #set bits in UARTB
ori $t0, $zero, 0x0C        #load BRG bits for baud rate of 2400
sw $t0, 0x40($s4)           #set BRG bits
ori $t0, $zero, 0x1440  #set enable bits for  status register (enable RX interupt)
sw $t0, 0x10($s4)           #clear and set status register of uart
####################
# setup processies #
####################
and $t0, $t0, $zero
sw $t0, 0x00($s0)        #clear TRISTATE buffer
sw $t0, 0x00($s1)        #clear ODCE
sw $t0, 0x00($s2)        #clear all the pins in the PMOD pins
li $a0, 0x01            #load value to turn on led 1
li $a1, 0x80            #value to count to before roating
li $a2, 0x00000300      #mailbox street adress
sw $zero, 0x00($a2)          # clear mbox <== program won't execute this, it just freezes here
nop