Schematics, Layout and Hexfile are published now so that everybody can build his own mouse converter free of charge!

As I have some Roland samplers but not enough MU-1 mice I had a look in the internet for a second hand MU-1 mouse. There were only a few mice to get - and these were very expensive. I also heard that there are still some new original Roland MU-1 available - but also very expensive. When I read that the Roland samplers use standard MSX-mice I thought that it is nice to know but these mouse type is not easy to get as the MSX-computers were very rare here in Europe...

So I decided to design mouse a converter that converts the mouse data of a mouse of another computer and converts the mouse information into MSX-mouse compatible suitable for the Roland samplers.

The design of the mouse converter should be powered by the sampler as there is a +5V supply voltage on the mouse connector. A low power microcontroller should be used so that the sampler power supply will not be stressed too much.

The next decision I had to make is the selection of the computer mouse type that should be converted.
 

Available mouse types:
 

As the standard mouse these days is the PS/2-mouse I also wanted to design a converter for this mouse. While searching the web for information how this mouse type works I found some projects of "PS/2 to MSX-mouse converters".

The results of the analysis of these projects was:

• One converter on a Brasilian page can never function as a PS/2 to MSX-mouse converter...
• A mouse converter on a Japanese page looks very interesting but the hexfile is not published on the page so I could not try this circuit.
• The third project I found looked very interesting:

    PS/2 MOUSE to TOWNS MOUSE Converter Version 1.11c
     All rights reserved, the Copyright (C) 2000 Anikun.

The schematics, the hexfile and some information can be loaded from the webpage, but all the information was in Japanese... The circuit itself was no problem but the tips and tricks in the schematics and the information file were simple unreadable. But after some time I got help from JP Grobler from South Africa. He was in contact with the author Anikun and got the English translation of these texts and sent it to me. This was in May 2003.
Now, about 14 months later I found some time and built a prototype of Anikuns mouse converter and this little circuit is working very well !!! (Tested with a Microsoft Intellimouse 1.1A)

More information about the MSX mouse	MSX Mouse Principle
Atari/Amiga mouse converter with 87C51 or 89C51 This PCB design has not been tested!  If you build it please let me know if it works or if there are errors!	Schematics (33kB) Layout 1:1 (not tested - 15kB) Layout 2:1 (not tested - 18kB) Part placing (13kB) Overview PCB design (23kB) Intelhex File of the firmware (1kB)        Tested with an Intel 87C51.
PS/2 mouse converter with PIC16F84 (C)2000 by Anikun The files inside this ZIP are the Japanese->English translated files  that should be published on Anikuns site some day.  I converted the doc-file into a pdf-file so that it is in a readable  format even if you don't have Microsoft Word.	PS/2 to MSX mouse converter The ZIP-file includes the schematic, hex-file,  connector pinning and documentation.