code_engine_start:
    mfc0   $k0, $13              ;; Cp0 Cause
    andi   $k1, $k0, 0x1000      ;; Pre-NMI
    bnezl  $k1, 1f
    mtc0   $zero, $18            ;; Cp0 WatchLo
1:

    andi   $k0, $k0, 0x7C
    li     $k1, 0x5C             ;; Watchpoint
    bne    $k0, $k1, 1f

    ;;...snip...

1:
    ;; Run code engine
    lui    $k0, 0x8000