my ($class, $ibx, $spec, $writable) = @_;
my ($type, $prefix, $query) = split(/:/, $spec, 3);
$type eq 'serial' or die "non-serial not supported, yet\n";
my ($class, $ibx, $spec, $writable) = @_;
my ($type, $prefix, $query) = split(/:/, $spec, 3);
$type eq 'serial' or die "non-serial not supported, yet\n";