Yamaha SKW-01
This page was last modified 23:47, 19 January 2023 by Mars2000you. Based on work by Gdx and Rderooy.



The module SKW-01 is a Kanji Word Processor Unit without disk support for MSX1 and higher computers.

It was made and sold by Yamaha and includes

  • a 32kB ROM with the application that can be launched with CALL JWP or _JWP
  • a 32kB ROM with a Kanji Dictionary
  • a 2kB SRAM
  • a non-standard 128kB Kanji-ROM (JIS1) with 3564 characters
  • a printer connector at the top
  • a switch at the top with the indication "MEMORY POWER" (to enable/disable the SRAM)

Extra characters, words and short sentences can be saved.

It is only for a Yamaha or derivative computer (Victor, Sakhr) with 60 pins slot. It does not fit in a regular MSX cartridge slot, without using the UCN-01 Unit Connector.

This same unit was also sold by Sanyo as the KA-MAP-06 package, including a Unit Connector referenced as KA-MAP-07, so it can fit a regular MSX cartridge slot.

Brand Yamaha
Model SKW-01
Year 1984
Region Japan
Launch price ¥49,800 (then decreased to ¥39,800)
Package content Module
Emulation ROMs dumped and emulated, with exception for the switch: the SRAM is enabled and can't be disabled.



Yamaha SKW-01 box and content
Yamaha SKW-01
Yamaha SKW-01 underside
Yamaha SKW-01 box
Yamaha SKW-01 PCB
Yamaha SKW-01 PCB underside
Yamaha SKW-01 back of box, manual and module


Yamaha SKW-01 Word Processor - intro
Yamaha SKW-01 Word Processor
Yamaha SKW-01 Word Processor