Sanyo MPC-10mkII
This page was last modified 10:08, 7 May 2021 by Mars2000you. Based on work by Im97u1 and SPMNT and others.




The Sanyo MPC-10mlII, a.k.a Wavy10mkII, is a more colored and slightly improved version of the MPC-10, the first MSX computer released by Sanyo. It has only one cartridge slot, but was sold with a lightpen, for which a hole is provided on top.

The machine has an integrated lightpen interface with firmware (Lightpen Graphics) and an expansion bus: it can be used as second cartridge slot with an adapter.

Size: 385(W)×62(H)×242(L)mm
Weight: 2.3kg

Sanyo released also the MPC-X, a Graphic Expander Unit which an extra VDP that adds 4 bitmap modes with 16, 4 or 2 colors on a palette of 512, high-resolution, superimposing, still function and zooming and uses lightpen. This expander needs to be connected to the MEB-01 slot expander, itself connected to the expansion bus of the MPC-10mkII.

This computer was officially viewed as Videotex terminal when the Sanyo MPC-CAP1 Captain Unit was also bought and the contract was signed with the Captain company. It got then an additional label MPC-S1, meaning that it was good for this extra using.

Brand Sanyo
Model MPC-10mkII
Year 1984
Region Japan
Launch price ¥75,800
RAM 32kB in slot 0
Media MSX cartridges
Video Texas Instruments TMS9918A
Audio PSG (AY-3-8910)
Chipset MB64H120, uPD65002C022 (Gate array for lightpen interface)
Keyboard layout QWERTY/JP50on
Extras reset button, lightpen interface with firmware and Expander BASIC, hole for lightpen, lightpen ?MLP-10
Emulation ROM dump needed. See this thread for details


The built-in firmware is automatically launched when booting the computer. You access a menu with choice between MSX-BASIC and Lightpen Graphics, a drawing program written by HAL Laboratory.

This utility requires a lightpen and comes with a MSX-BASIC extension called Expander BASIC. It allows to save your drawings in a MSX-BASIC program, which uses the additional instructions.

You can also optionally write directly programs using these instructions. When you choose 'MSX-BASIC' in the main menu of this utility, the Expander BASIC is indeed available for using (even without lightpen).



Sanyo MPC-10mkII box and content
Sanyo MPC-10mkII
Sanyo MPC-10mkII back
Sanyo MPC-10mkII underside
Sanyo MPC-10mkII label
Sanyo MPC-10mkII right side
Sanyo MPC-10mkII manual
Sanyo MPC-10mkII rightside connectors


Main menu
Lightpen Graphic


The MPC-10mkII is a MSX1 with with a Z80A from NEC (D780C-1).

The lightpen uses I/O ports 0B8h~0BBh.

Slot Map

Slot 0 Slot 1 Slot 2 Slot 3
Page C000h~FFFFh RAM Cartridge
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM Lightpen
Page 0000h~3FFFh
  • The firmware ROM is a 8kB ROM - 4000h-5FFFh.