movia   r9, stub
    ldw     r10, 0(r9)
    ldw     r11, 4(r9)
    ldw     r12, 8(r9)

    movia   r9, e_adress
    stw     r10, 0(r9)
    stw     r11, 4(r9)
    stw     r12, 8(r9)

    #
    # Add your code here to initialize timer_1 for
    # continuous interrupts every 100 ms (0.1 s)
    #

    movia   r6, timer1_period_low
    movia   r7, timer1_period_high
    movia   r10, timer1_control

    movhi   r8, %hi(timeout)
    ori     r8, r8, %lo(timeout)
    andi    r9, r8, 0xffff
    srli    r8, r8, 16

    andi    r8, r8, 0xffff

    stwio   r8, 0(r7)
    stwio   r9, 0(r6)

    movi    r11, 0b0111
    stwio   r11, 0(r10)


    #
    # For Assignment 4 (but not earlier!),
    # add code here to initialize de2_pio_keys4
    # for interrupts from KEY0
    #

    #
    # Add your code here to initialize the CPU for
    # interrupts from timer_1 (index 10) only.
    # For Assignment 4 (but not earlier!),
    # add code here to also initialize the CPU for
    # interrupts from de2_pio_keys4 (index 2)
    #

    movi    r9, 0b1000000000
    wrctl   ctl3, r9

    #
    # Add your code here to enable interrupts
    # by writing 1 to the status register
    #

    movi    r9, 1
    wrctl   ctl0,r9