Casio MX-10
This page was last modified 17:05, 19 March 2018 by Rderooy. Based on work by Mars2000you and Hamlet and others.
Casio MX-10.png



The MX-10 is the successor of the Casio PV-16 with the same characteristics but with an exception: to make the computer as small as possible, the tape interface was removed from the machine as with the PV-7. As a result, the MX-10 requires the FA-32 CMT I/F package in order to use a cassette recorder.

Other differences are the placement of the cursor keys and a cheaper price, justified by the presence of the more sophisticated MSX2 machines out at the time. The quality of the chiclet keyboard is as questionable as its predecessor, but with cheaper rubber keys instead of hard plastic.

The joypad keys are arranged in a diamond shape (instead of a circle) without the 'Joypad 1' indication. Together with the TR1 and TR2 keys on the bottom left of the computer, these are equivalent to a joystick inserted into joystick port 1. It is likely that only games that use BIOS routines to handle the joysticks are supported by this internal joypad, including BASIC games which use the STICK command (though has not been confirmed).

Apart from the 'Joypad 1' keys, the computer also features normal cursor keys aligned above the joypad keys. There may be a "Type B" sticker on the left side just below the keyboard, this just means it has two separate joystick trigger buttons.

It is possible to add two cartridge slots and a printer port by combining the MX-10 with the KB-10 expansion unit. The MX-10 does not use an internal power supply; the provided AC power adaptor (AD-4175) is required if the KB-10 unit is not used, which has its own power supply.

This machine was aimed at the Japanese market. Both the computer and the expansion unit were available in black (BK) and red (RD) colors. Official prices: ¥19,800 for the computer, ¥13,800 for the KB-10 expansion unit and ¥3,000 for the FA-32 tape connector adapter.

This machine was adapted for the international market as the MX-15.

Brand Casio
Type MX-10
Year 1986
RAM 16kB in slot 0 (with or without KB-10)
Media MSX cartridges
Video Texas Instruments TMS9118NL
Audio PSG (AY-3-8910)
Chipset Hitachi HG61H06
Extras Two specific keys TR1 and TR2, Joypad 1 cursors, (with KB-10) third cartridge slot


Casio MX-10 RD
Casio MX-10 PCB underside
Casio MX-10 PCB
Casio MX-10 BK
Casio MX-10 left side
Casio MX-10 right side
Casio MX-10 label
Casio MX-10 BK box
Casio MX-10 AC Adapter & Operation Manual


The Casio MX-10 is an MSX1 system with a Z80A clone manufactured by NEC (DA780C-1) and a Hitachi HG61H06 gate array (seems to implement at least the PPI).

The pins SW1, SW2, -12V and +12V of the cartridge connector are not connected. In general, MSX systems without a protection switch have pins SW1 and SW2 connected to GND. A few rare cartridges use SW1 and SW2 as GND and some cartridges require the -/+12V rails, such as the FM-PAC.

The AC power adaptor output is 7V with tip negative polarity, and puts out 800mA. It is not used when the computer is connected to the KB-10 expansion unit, which has its own internal power supply.

Slot Map without KB-10

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

Slot Map with KB-10

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


  • RF output
  • Analog sound output (mono)
  • Composite video output
  • MT/IF connector (requires the FA-32 CMT I/F package in order to connect a standard tape recorder)
  • Centronics-compatible parallel port (on the left side of the expansion unit KB-10)
  • Two 9-pin DE9 connectors (joysticks, mouse, paddle controllers, etc.)
  • One cartridge slot (without the KB-10) or three cartridge slots (with the KB-10)
  • One expansion slot for the KB-10 unit
  • AC power adaptor connector