Mitsubishi ML-F120
This page was last modified 21:46, 2 February 2023 by Mars2000you. Based on work by Rderooy and Gdx and others.




The Mitsubishi ML-F120 and ML-F110 are very similar.

The biggest differences are that the ML-F110 has only 16kB of RAM and no any build-in firmware while the ML-F120 has 32kB and comes with a application firmware.

Also the cases are colored differently; the ML-F110 is red and the ML-F120 is gray. Both models were sold in Japan with the LETUS nickname.

This model has been localised for the European and French markets - see the ML-F48 and the Yeno MX64.

Brand Mitsubishi
Model ML-F120
Year 1984
Region Japan
Launch price ¥64,800
RAM 32kB in slot 0
Media Cartridges
Video Texas Instruments TMS9918ANL
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 ROMs dumped and 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-F120
Mitsubishi ML-F120 back
Mitsubishi ML-F120 label
Mitsubishi ML-F120 PCB
Mitsubishi ML-F120 manuals
ML-F120 box and computer
Mitsubishi ML-F120 manual
Mitsubishi ML-F120 C-BOL manual


Main menu
Robot manipulation
C-BOL menu


The ML-F120 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 designed, this machine is not compatible with the addition of a disk drive. If a disk drive is added, it is no longer possible to exit the firmware menu to BASIC, as the system will instead reboot and go back to the firmware menu. A modification is required to use slot 1 instead of slot 3 for the built-in firmware, or to disable the firmware menu altogether. Changing the firmware to use slot 1 has another side effect, cartridge programs such as games will no longer automatically start on boot. Instead you will go to the firmware menu and will have to select BASIC to start them. Disabling the built-in firmware has no such side effect.

External Links