is a Programmable Sound Generator (PSG) Integrated Circuit, primarily manufactured by . It is functionally equivalent to the legendary General Instrument AY-3-8910
The "KC" prefix in the part number is a strong indicator of Korean-manufactured clones. During the 1980s and 1990s, several Asian semiconductor firms produced compatible versions of popular Western chips. The KC89C72 is believed to be one such clone, produced for the consumer electronics market. kc89c72 datasheet
to send commands to the chip for partial capability demonstrations. KC89C72 FILFACT/SAMSUNG DIP-40 Other Components is a Programmable Sound Generator (PSG) Integrated Circuit,
Timing requirements (bus control):