Batman Forever used a modified Sharp SM-512 MCU that doesn't need a crystal (die ID KMN1202)
die shots (bottom left is pin 1, numbered CCW)
ROM array with top metal removed
K1 is DAT S1 is /LOAD S2 is CLK S3 goes to a 10K resistor connected to the anode of a diode. R goes to another 10K resistor connected to the anode of another diode. The 2 diodes' cathodes are connected together and to audio out. S4 is backlight LED
