Yamaha S3527
This page was last modified 01:56, 11 January 2020 by Gdx. Based on work by Rderooy and Mars2000you and others.
Yamaha S3527

The Yamaha S3527 is a chipset called MSX-SYSTEM with the following features:

  • a Yamaha YM2149 PSG-sound chip, compatible with a General Instrument AY-3-8910 (for sound, joystick ports, etc)
  • PPI: backward compatible with the Intel i8255 (primary and some secondary slot selection, keyboard (keypad included), cassette interface, etc)
  • other MSX functions: DRAM/ROM control, printer interface, etc.
  • 100 pins


  • the S3527 is used in several MSX2 machines. In case of RTC and optional MSX2 features, these are implemented using additional IC's.
  • it has been preceded by a silicon protype, the X3527, used in the Yamaha CX11 computer