Sanyo MPC-CAP1
This page was last modified 14:26, 13 January 2022 by Mars2000you. Based on work by Gdx.


The Sanyo MPC-CAP1 is a special modem, sold as expansion unit for MSX1 computers to access to the Captain system. Official name is "Captain Unit".

The device can be connected to the specific expansion bus slot of a few Sanyo MSX1 computers (see below). A connection to the 20-pin connector of the MPC-X Graphic Expansion Unit is provided at the back.

This peripheral includes a cartridge slot and contains a font ROM especially designed for the Captain system. A switch on the device allows to choose between MSX computer and Videotex as video source.

Launch price: ¥178,000

To use this peripheral, you needed to have

  • a Japanese MSX1 computer - recommended machines are the following Sanyo machines, because they have at least 32kB RAM, a specific expansion bus slot and don't require an adapter: MPC-6, MPC-10, MPC-10mkII, MPC-11
  • the Sanyo MPC-X Graphic Expander Unit (¥89,800)
  • the KA-MPC-X package (¥27,600)
  • optionally' the KA-UC-X adapter (¥7,800)
  • optionally a lightpen Y4AA (¥14,000) if the MSX1 computer has a built-in lightpen interface
  • optionally a lightpen with interface MLP-01 (¥30,000) when you use a MSX1 computer without this interface (it's the case of the MPC-6)


  • The lightpen Y4AA is provided with the MPC-11. The lightpen MLP-10 is provided with the MPC-10 and probably the MPC-10mkII. Differences with lightpen Y4AA are unknown.
  • The mentioned computers were officially viewed as Videotex terminals when the contract was signed with the Captain company. They got then an additional label MPC-S1, meaning that they were good for this extra using.


Sanyo MPC-CAP1 with MPC-X Expander and MPC-10mkII computer
Sanyo MPC-CAP1 connection to the MSX1 computer
Sanyo MPC-CAP1 connection to the MPC-X Graphic Expander Unit