zBoy is an original Game Boy Emulator. Compatibility is very high and there is no sound.

....supports load/save features, can perform PCX screenshots either manually or automatically (every few seconds), and emulates an internal battery for ROMs that were designed to use one (this allows to use the internal save option provided by such games, remember highest scores, etc). zBoy supports some additionnal features, too, like intelligent saving of hi-scores for some games that aren't able to save their hi-scores table by themselves, and improving screen's resolution output using graphic algorithms like Scale2x, eagle....