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Y > YAMAHA  > CX5M Music Computer   

CX5M Music Computer

This Yamaha computer was specialised in music and sound production. In fact it was a classic MSX 1, with a special Yamaha synthesizer built-in (SFG-01) and optional piano keyboard. It was clearly designed to be a computer for musicians.

You got 48 internal voices with a really suprising quality for that time. It was a real synthesizer (equivalent of the Yamaha DX-9 synth.), with which you could change or create your own sounds.

The CX5M was in fact the same computer as the Yamaha YS-503, but it had the SFG-01 Sound Module and MIDI interface integrated.


Malcolm Ramage adds:
The FM sound module in the CX5M was the synthesizer guts of Yamaha's FB-01 sound module and with a little utility, you could swap sounds between the CX5 and the FB-01.
Yamaha also released the C1 music laptop, this was an IBM compatable laptop, with 4 inbuilt MIDI ports for musicians on the move. The only other laptops that had anything similar were the Atari STacy and the ST Book.

John's memories:
This was truly an innovative piece of equipment. Not only was it a DOS (MSX-DOS) computer, but it was just like having a DX-9 synth, if you had the YK-10/20 keyboard, which I, of course owned along with it.
I composed so many songs, concertos, hymns, etc on it. I had quite a few of the ROM cartridges, the disk drive, the SERIAL printer, the YK-20 keyboard and the FB-01 sound module (a DX-7 in a box).
You could edit all the sounds-EASILY! You could write and print music. You could write text documents. This thing was not only fast, but easy to program in BASIC. I wish I still had it. Someone should come up with something similar today....

Please consider donating your old computer / videogame system to or one of our partners from anywhere in the world (Europe, America, Asia, etc.).


I have an old cx5m that I am refurbishing - however it''s missing a couple of function keys. Does anyone know where I can pick up parts?

Thursday 27th April 2017
caleb wood

I used to own one of these a long time ago. Would love to have one again. If anyone has one, shoot me an email at

Friday 7th October 2016
blur2040 (USA)

I have an untested but otherwise mint condition cx5m/msx keyboard for sale - £10

Friday 5th June 2015


NAME  CX5M Music Computer
TYPE  Home Computer
YEAR  1984
BUILT IN LANGUAGE  Microsoft Extended Basic (MSX Basic V1.0)
KEYBOARD  QWERTY Mechanical keyboard, 73 keys
CPU  Zilog Z80
SPEED  3.58 MHz
RAM  32 kb (up to 64 kb)
VRAM  16 kb
TEXT MODES  Mode 0 : 40 x 24
Mode 1 : 32 x 24
GRAPHIC MODES  Mode 2 : 256 x 192 with 16 colors (Hires mode)
Mode 3 : 64 x 48 with 16 colors (Multi colour mode)
32 sprites
SOUND  General Instruments AY-3-8910 Programmable Sound Generator
3 channels, 8 octaves
+ built-in SFG-01 Sound Module (FM sound generator, 4 operators, 8 algorithms, 8 note polyphony and 46 presets sounds)
I/O PORTS  Two cartridge slots (top & rear), printer connector, tape interface (DIN8), Sound output, Video composite output, Video RF output
Built-in synthesizer : Piano keyboard connector, MIDI out & in, Stereo audio output
PERIPHERALS  SFG-05 sound module
Disk drive
Magnetic cards reader
Piano keyboards
and more...
PRICE  Unknown

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