Yamaha CX5M 1986

Yamaha CX5MU MSX System – Rare "Show Pool" Unit w/ SFG-05 MIDI & FD-05U Floppy Expansions (100% Tested Complete Archive)Up for sale is an exceptionally complete, museum-grade Yamaha CX5MU MSX Music Computer archive. This specific unit features incredible corporate tech provenance as an official, factory-labeled Yamaha Show Pool exhibition unit (dated 7-7-86). It comes highly upgraded, fully documented with original literature, and is 100% functionally verified down to the floppy drive data pipeline.

📦 Complete System InventoryCore Hardware: CX-5MU Music Computer (Show Pool Unit) & YK-10 Music Keyboard.Sound Engine: Upgraded SFG-05 FM Synthesizer Unit II (Factory swapped; adds standard MIDI input for modern studio integration).Storage Pipeline: FD-05U Micro Floppy Disk Drive & FD-051 Floppy Disk Interface.Software Cartridge: YRM-303 MIDI Macro & Monitor Cartridge (with original box/insert).Cables & Interconnects: RF-02 RF Modulator/Switch, power supplies, and proprietary interface cables.Complete Literature & Paperwork:FM Sound Synthesizer Unit II (SFG-05) Owner's ManualMSX BASIC Reference ManualCX5M Music Computer Owner's ManualFD-05 Micro Floppy Disk Drive Operating InstructionsYRM-303 MIDI Macro & Monitor Owner's ManualOriginal Yamaha system promotional brochures & period ephemera.Packaging: Includes original factory boxes for the core components.

⚙️ 100% Verified FunctionalityUnlike standard "as-is" vintage electronics listings, every single data pipeline in this system has been rigorously tested:Audio & MIDI: The upgraded SFG-05 II module sounds excellent via direct RCA outputs and seamlessly accepts incoming external MIDI data.Keyboard: YK-10 keyboard triggers perfectly across its entire key range with full polyphonic operation.Floppy Drive: The notoriously finicky FD-05U micro floppy drive works flawlessly. Successfully formatted a double-sided disk, saved a BASIC program (TEST.BAS), verified the disk directory, and reloaded the file without errors (see CRT screen capture).Cartridge: YRM-303 cartridge boots instantly into MIDI Macro & Monitor Version 1.0.

✨ Condition & Historical ProvenanceThe Gear: Exceptionally clean, near-mint cosmetic condition. Free of typical plastic yellowing or heavy scuffs.The "Show Pool" Premium: Features an intact, authentic orange Yamaha Show Pool factory label dated 7-7-86 on the undercarriage, marking its history as an official corporate demonstration piece.The Boxes: Original factory cartons are intact with internal styrofoam inserts. The boxes are not pristine; they show clear, authentic age, shelf-wear, and historical transit markings from its time in the Yamaha corporate pool. They are presented honestly as historical provenance. Screen shown in images is not part of the sale, included for demo purposes only.