# Lab program for Nios-II IDE tutorial
        
        .text                   # 

        .global main            # makes label "main" globally known

main:   movi    r10,0x41        # Load the hexadecimal value 41
                                # to register r10

loop:   mov     r4,r10          # Copy to r4  from r10

        nop                     # (later changed to call hexasc)
        nop                     # (later changed to mov r4, r2)

        movia   r15,putchar     # copy subroutine address to register
        callr   r15             # call subroutine via register

        addi    r10, r10,1      # Add 1 to register r10
        andi    r10, r10, 0x7f  # mask with 7 bits
        ori     r10, r10, 0x20  # set a bit to avoid control chars

        br      loop            # 

        .end                    # The assembler will stop here
        foo bar bletch          # comes after .end - ignored