Changes

In r005.4, I add another UpperROM set : .f00 to .fFF file extension (hexa). If you press "space" during a reset_key ("page up" key), upperROM files used range from .f00 to .fFF instead of ranging from .e00 to .eFF. LowerROM .eZZ file extension is still used in both case.

=== Sound output ===