Yamaha CX7M/128

The Yamaha CX7M/128 was a higher-end music-oriented MSX computer with 128 KB RAM, FM synthesis, MIDI and expanded connectivity for studio and educational work.

It represented the mature first-generation Yamaha music-computer concept before the company’s MSX2 systems.

Notable Features

• 128 KB memory
• Integrated Yamaha FM/MIDI music module
• Professional music-keyboard connectivity

Historical Significance

• It represented the mature first-generation Yamaha music-computer concept before the company’s MSX2 systems.

Collector’s Notes

• Music modules, cables and region-specific system software should remain with the base computer whenever possible.
• Memory, storage, displays and expansion hardware should be documented because configurations often changed during a system’s working life.

Specifications

Technical Information
Name	Yamaha CX7M/128
Manufacturer	Yamaha
Launched	Tuesday, January 1, 1985
Country	Japan
CPU	Zilog Z80A compatible
Units Sold
MIDI	MIDI IN and OUT
Form Factor	Keyboard console
Power	Internal or external mains supply
Networking	None built in
Operating System	MSX BASIC; MSX-DOS on disk-equipped models
Expansion / I/O	Cartridge, cassette, joystick, printer and video connections
Keyboard	Integrated keyboard
Storage	Cartridge, cassette and optional floppy disk
Sound	YM2149 PSG plus Yamaha eight-voice FM synthesis
Colours	16 on MSX1; expanded palette on MSX2/2+
Graphics	TMS9918-family 256 x 192 pixel graphics
Display	Television or monitor
ROM	MSX BIOS and BASIC plus model firmware
RAM	128 KB main RAM and 16 KB video RAM
CPU Speed	3.58 MHz