Musical Mobile

This is the chip from a musical mobile that played Mozart, Bach, nature and island sounds.

It's pretty likely that the four blocks in th eimage are where the data for the four different sounds is located.

Casio fx-602p

This is the main chip inside a casio fx-602p calculator from the 1980s.

Unfortunately the ROM contents are not visible, I have to remove a layer to get at them. Other circuitry is visible though.