 take no arguments. The payload is essentially ignored.</li>
    <li>1 arg - All payload bits correspond to a single value, usually a signed
        or unsigned integer.  Used for instructions of 1 argument, like
        returning a value, yielding a value to the parent fiber, or doing a
        (relative) jump.</li>
    <li>2 arg - Payload is split into byte 2 and bytes 3 and 4. The first
        argument is the 8-bit value from byte 2, and the second argument is the
        16-bit value from bytes 3 and 4