Yamaha CX5M Music Computer SFG-05 FM Sound Synthesizer II - MIDI Upgrade

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"Rare refurbished and fully tested SFG-05 FM Sound Synthesizer Unit II (upgraded from SFG-01 unit) for Yamaha CX5M MSX Music Computer in mint working and cosmetic condition.

This upgrade allows a CX5M Music Computer to be controlled wwith any MIDI-compatible keyboard or other controller. The unit is 4-part multi-timbral, using an updated SFG-05 software interface to control the onboard 4-operator FM Synthesizer (build on the same architecture as the Yamaha FB-01 or DX11).

Disclaimer: The unit is a fully tested refurbished unit. I installed an AMD 27C256 Eprom with the new SFG-05 firmware, performed all additional upgrade modifcations, and added an IC socket for the firmware chip, so it can be easily replaced without soldering. I also created a label for the case, based on the original Yamaha label design for the SFG-05.

The photos of the board show the differences between the standard SFG-01 board (for comparison, not included in purchase) and the SFG-05 board (photo the actual board inside the cartridge you are buying).

The SFG-05 comes in the original SFG-05 packaging, incl. a copy of the Yamaha SFG-05 hardware/software manual."