This Yamaha computer is specialised in music and sound production. In fact it is a low range MSX 1 computer, but if you bought the special Yamaha synthesizer and piano keyboard, then you had a real synthesizer with a sound quality really suprising for that time, and the ability to change or create you own sounds.
The YIS-303 is in fact the same computer as the Yamaha CX5, but it has not got the SKW-01 Sound Module built-in.
Yamaha also produced upgraded versions of this computer : the CX5M and the YIS-503.
BUILT IN LANGUAGE
Microsoft Extended Basic (MSX Basic V1.0)
QWERTY rubber keyboard, 73 keys
32 kb BASIC/BIOS ( MSX BASIC V1.0)
Mode 0 : 40 x 24 Mode 1 : 32 x 24
Mode 2 : 256 x 192 with 16 colors (Hires mode) Mode 3 : 64 x 48 with 16 colors (Multi colour mode) 32 sprites
General Instruments AY-3-8910 Programmable Sound Generator 3 channels, 8 octaves
2 joystick sockets 1 cartdridge slot Tape-recorder plug (1200/2400 bauds) TV output Centronics interface Side bus (60 pins) Expansion bus