entry := ((*[2]uintptr)(unsafe.Pointer(f)))[1]
	preamp := ((*[4]uint32)(unsafe.Pointer(entry - eyecatcherOffset)))

	offsetPpa1 := preamp[2]
	if offsetPpa1 > 0x0ffff {
		return "", fmt.Errorf("PPA1 offset seems too big 0x%x\n", offsetPpa1)
	}

	ppa1 := uintptr(unsafe.Pointer(preamp)) + uintptr(offsetPpa1)
	res := ptrtest(ppa1)
	if res != 0 {
		return "", fmt.Errorf("PPA1 address not valid")
	}