Mitsubishi ML-F120D
This page was last modified 21:55, 7 October 2021 by Mars2000you. Based on work by Sdsnatcher73 and Rderooy and others.




The Mitsubishi ML-F120D is the same as to ML-F120 with a RGB output instead of the video composite.

The model number is colored differently. It was sold in Japan with the LETUS nickname.

Brand Mitsubishi
Model ML-F120D
Year 1984
Region Japan
Launch price ¥74,800
RAM 32kB in slot 0
Media Cartridges
Video Texas Instruments TMS9928ANL
Audio PSG (AY-3-8910A)
Chipset none (separate IC's)
Keyboard layout QWERTY/JIS
Extras Firmware (Household account book, Address book, File management, Performance management, Notepad, Health management, Robot manipulation, C-BOL)
Emulation This machine has the same roms as the ML-F120, which is emulated


The ML-F120 has a built-in firmware including 8 applications:

  • Household account book
  • Address book
  • File management
  • Performance management
  • Notepad
  • Health management
  • Robot manipulation (requires the ML-ROBO)
  • C-BOL (a simplified programmation language to control the ML-ROBO)



Mitsubishi ML-F120D
Mitsubishi ML-F120D back
Mitsubishi ML-F120D label
Mitsubishi ML-F120D box
Mitsubishi ML-F120D PCB
Mitsubishi ML-F120D PCB
Mitsubishi ML-F120D
Mitsubishi ML-F120D right side


Mitsubishi ML-F120D firmware - general menu
Mitsubishi ML-F120D firmware - Robot manipulation
Mitsubishi ML-F120D firmware - C-BOL menu


The ML-F120D has 2 cartridge slots (top and rear). The Z80A comes from NEC (D780C-1).

Slot Map

Slot 0 Slot 1 Slot 2 Slot 3
Page C000h~FFFFh RAM Cartridge
Slot 1
Slot 2
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM Firmware
Page 0000h~3FFFh



As it is conceived, this machine is not compatible with the addition of a disk drive. A modification is required to use slot 1 instead of slot 3 for the build-in firmware and make possible this addition. After this upgrade, playing games in cartridge is no more automatic : you need to choose BASIC in the special menu.

External Links