clear_regs:
    pshx
    pshy
    psha
    pshb             // save all values in the IRs and accumulators
    ldx #reg_file    // load into x the address of reg_file
    ldy #0
    ldaa #8          // number of regs in lc3/2

clear_regs_loop:
    cmpa #0
    beq clr_regs_loop_end
    sty  0,x
    inx
    inx
    deca
    jmp clear_regs_loop
    
    
clr_regs_loop_end:
    pulb
    pula
    puly
    pulx
    rts