Yamaha CX5M with Keyboard / Midi & Rare Cartridges / Manuals - Message Me for a Shipping Estimate

Extremely clean & rare Yamaha CX5M MSX computer with the following:

• Yamaha CX5M MSX Computer with:
  • Upgraded audio module
  • Keyboard connector 
  • Stereo RCA ouputs
  • Midi in and midi out
  • Joystick ports, printer, cassette & monitor outputs
• Yamaha YK-10 keyboard
• Custom hand built video cable (composite)
• YRM-102 FM Voicing Program cartridge
• YRM-501 FM Music Composer II cartridge
• Manuals (Not Mint)

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Generic Information About the Yamaha CX5M

The Yamaha CX5M was made around 1984-1985 and was based on the MSX standard, which was a great flop. It had a Z80 CPU and ran, apart from ROM BASIC, an operating system equivalent to MS-DOS 1.0, if you can imagine. However, it also had a built-in 4-operator FM synth (as opposed to the DX7’s 6 operators), soundwise equivalent (and patch-compatible, I think) to the DX9, DX21, DX100, and FB-01.
The original CX5M could only be played with a proprietary non-velocity sensitive Yamaha keyboard, and not via MIDI. It could be upgraded, however. If you take a look under your CX5M you will see the bolted-on synthesizer unit. If you can read ‘Yamaha FM Sound Synthesizer Unit II’ and ‘Model SFG-05’, you have the upgraded version. There also was a later model called the CX5M II/128. These two latter versions were velocity-sensitive playable via MIDI.
You cannot use an RGB monitor with the CX5M, you only have an RF output to go into the antenna socket on your TV, and a ‘composite video’ output, also found on many TV sets and old PC monitors.
Software for the CX5M came in the form of plug-in cartridges. If you have the original CX5M, the only cartridges of any practical use would be:

1. The YRM-303 MIDI Macro & Monitor, showing MIDI messages on screen, very handy for MIDI system troubleshooting.
2. The YRM-103 DX7 Voicing program, making it possible to edit DX7 sounds on screen instead of the DX7’s LCD display. 

The original CX5M could only be played with a proprietary non-velocity sensitive Yamaha keyboard, and not via MIDI. It could be upgraded, however. If you take a look under your CX5M you will see the bolted-on synthesizer unit. If you can read ‘Yamaha FM Sound Synthesizer Unit II’ and ‘Model SFG-05’, you have the upgraded version. There also was a later model called the CX5M II/128. These two latter versions were velocity-sensitive playable via MIDI.
You cannot use an RGB monitor with the CX5M, you only have an RF output to go into the antenna socket on your TV, and a ‘composite video’ output, also found on many TV sets and old PC monitors.
Software for the CX5M came in the form of plug-in cartridges. If you have the original CX5M, the only cartridges of any practical use would be:

1. The YRM-303 MIDI Macro & Monitor, showing MIDI messages on screen, very handy for MIDI system troubleshooting.

2. The YRM-103 DX7 Voicing program, making it possible to edit DX7 sounds on screen instead of the DX7’s LCD display.

If you have one of the upgraded versions, however, you will be able to use it as an external MIDI sound device. You then also will need the ‘YRM-502 FM Voicing Program II’ cartridge to edit the internal sounds. The CX5M is 8-voice, 4-channel multitimbral without dynamic voice allocation. Storage of sounds is on cassette tape. Any tape recorder can be used, but you need a special DIN-to-minijack cable, originally included with the CX5M. There was also an external disk drive available, but it was terribly expensive and very difficult to find. When you boot the CX5M, it defaults to the ROM BASIC, with no access to the synthesizer unit. You have to type ‘call music’ to get access to the synth, ‘call fmv’ to access the FM Voicing program, etc.

I know of the following plug-in cartridges for the CX5M:

• YRM-101 FM Music Composer
• YRM-102 FM Voicing Program
• YRM-103 DX7 Voicing Program
• YRM-104 Music Macro
• YRM-105 DX9 Voicing Program
• YRM-301 MIDI Recorder
• YRM-302 RX Editor
• YRM-303 MIDI Macro & Monitor
• YRM-304 DX7 Voicing Program II
• YRM-305 DX21 Voicing Program
• YRM-501 FM Music Composer II
• YRM-502 FM Voicing Program II
• YRM-504 Music Macro II
• YRM-506 FB-01 Voicing Program

The YRM-10x carts does NOT work with a disk drive.

Other Yamaha peripherals:

• YK-01/10/20 Keyboard
• SFG-01/05 FM Sound Synthesizer Unit
• STC-01 Modem/Word Processor
• FD-03/05 Micro Floppy Disk Drive
• FD-051 Disk Drive Interface Cable
• FD-052 Expansion Cable
• MF2DD Floppy Disk
• UDC-01 Data Memory Cartridge
• MU-01 MSX Mouse
• YJS-01 Joystick
• CA-01 Single Cartridge Adaptor
• VC-02 Video Connector Cable
• RF-02 RF Convertor with Cable
• MI55116 Cassette Connection Cable
• MD-X1 MIDI Cable
• PN-101 Dot Impact Printer
• CB-01/02 Printer Cable
• PN-101 PF Pinfeed Unit
• PN-101 RB Printer Ribbon

Third-party peripherals:

• D.M.S.1 Real-time recorder

8-track sequencer program made by the small English company Digital Music Systems Ltd.
This was a plug-in cartridge that made the CX5M do what Yamaha said was impossible: Real-time sequence recording using the CX5M’s built-in sound module AND external MIDI gear. It also expanded the factory sounds with 54 new patches, PLUS any 48 additional patches made with the FM Voicing cartridge.
More info in the DMS1 user guide: