Yamaha S1985
This page was last modified 12:57, 26 July 2018 by Gdx. Based on work by Mars2000you and Rderooy and others.
Yamaha S1985

The Yamaha S1985 is an MSX-Engine similar to the S3527 with some optional features in extra

The features are:

  • 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 (for primary/secondary slot selection, keyboard (keypad included), cassette interface, etc)
  • other MSX functions: DRAM/ROM control, printer interface, etc.
  • Memory Mapper (up to 512kB )
  • Real Time Clock (Ricoh RP5C01A compatible) including 26 x 4 bits RAM, backed up by (separate) battery
  • 100 pin flat plastic package

Systems with the S1985