Mitsubishi ML-G30 Model 2
This page was last modified 16:29, 28 June 2021 by Mars2000you. Based on work by SPMNT and Rderooy and others.



The ML-G30 Model 2 is a very professional MSX2 computer with a separate keyboard and many connectors. It has been released in 2 different colors (white and black).

This machine is an improved version of the ML-G30 Model 1 computer as it has 2 built-in disk drives and a RS-232C interface with switch at the back of the computer; it looks very similar to the Hitachi MB-H70.

The panel at the back with the sound and video connectors will be different if you install the ML-35AV Audio-Video interface with superimposing, digitizing and Telop capacities.

This computer has been adapted for the Spanish market with less RAM and only one disk drive - see ML-G3.

Brand Mitsubishi
Type ML-G30 Model 2
Year 1985-08
Region Japan
Original price ¥208,000
RAM 128kB in slot 3-2
VRAM 128kB
Media MSX cartridges, 2DD floppy disks
Video Yamaha V9938
Audio PSG (YM2149 integrated in MSX-SYSTEMII S1985)
Chipset Yamaha S1985
Keyboard layout QWERTY/JIS
Extras Two 720kB 3,5" floppy disk drives, external disk drive connector, third cartridge slot, Reset button, Kanji-ROM level 1, RS-232C interface in a fourth cartridge slot + switch, sold with disk Melbrains Note (Word Processor + Calc + Graphic Editor + Communication Program)
Emulation emulated in blueMSX (except the extra cartridge slots) - ROM dump needed for openMSX. See this thread for details


Mitsubishi ML-G30 Model 2 White
Mitsubishi ML-G30 Model 2 label
Mitsubishi ML-G30 Back
Mitsubishi ML-G30 Model 2 Black
Mitsubishi ML-G30 Main PCB
ML-G30 Model 2 RS-232C PCB
ML-G30 Internal cartridge slots
ML-G30 Internal cartridge slots
ML-G30 Internal cartridge slots
Mitsubishi ML-G30 back with the ML-35AV interface installed
Mitsubishi ML-G30 keyboard
Mitsubishi ML-G30 Model 2 Reset button and right side


The ML-G30 Model 2 is a MSX2 with three or four cartridge slots (1 external in front and 2 or 3 internal in back), a Z80A from NEC (D780C-1) and an MSX-Engine S1985 from Yamaha.

About the 3 internal slots:

  • Back side top slot corresponds to slot 3.3 where the RS-232C interface is located
  • The back side slot at the middle corresponds to slot 3.1.
  • The lowest back slot is slot 2.

Slot Map

Slot 0 Slot 1 Slot 2 Slot 3-0 Slot 3-1 Slot 3-2 Slot 3-3
Page C000h~FFFFh Cartridge
Slot 1
back slot
back slot
back slot
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM Disk ROM
Page 0000h~3FFFh Sub-ROM


  • RF output (removed if you install the ML-35AV interface)
  • RGB output
  • Analog sound & Composite video (replaced if you install the ML-35AV interface)
  • Keyboard connector
  • Data Recorder connector
  • External disk drive connector
  • Expansion unit connector
  • Centronics compatible Parallel port for a printer
  • 2 general connectors (Joysticks, Mouse, Paddle controlers, etc)
  • 3 or 4 cartridge slots (1 external, 2 or 3 internal - if you remove the RS-232C interface, a 4th cartridge slot is available)
  • Power plug for main power supply (JIS C 8303 class, AC 100V +/-10% 50/60Hz)
  • Power outlet for monitor (AC 100V)