MSX PS/2 mouse adapter - new version

by sd_snatcher on 15-03-2009, 11:45
Topic: Hardware
Languages:

It's no secret within the MSX community that an MSX mouse in good condition is hard to find these days. Most of them are low-DPI devices that use the problematic ball-and-wheels mechanism, which doesn't work quite well after all these years.

There are some adapters for RS-232 and PS/2 mouses out there, but those are also rare to find and/or expensive. Also, there was a known design on the internet of a DIY PS/2 mouse adapter by Anikun, but apart from being a great initiative, it had two problems: it used a hard-to-find, old and expensive PIC (16F84A) and had a tendency to freeze quite a lot.

Sturaro took the burden to port the design to a much more affordable and easier to find PIC, the 16F628A. He ironed out the bugs that made it freeze, and he even added a fancy activity-led. And so, you now can build this DIY adapter yourself and use a brand new optical PS/2 mouse with SymbOS, or any other MSX application that requires a mouse!

Relevant link: MSX Hardware page

Comments (12)

By SaebaMSX

Hero (533)

SaebaMSX's picture

15-03-2009, 11:57

This IS a very good new!!! Do the USB->PS2 converters work too? That theoretically would do most of mouses be MSX compliant. Smile

As I can't print the PCBs I hope some can build this in Europe to buy it! Or can it be ordered directly? Cool

By cax

Prophet (3721)

cax's picture

15-03-2009, 15:03

Is ATTiny2313 a rare chip ? caro made an adapter using this chip here: http://zx.pk.ru/showthread.php?t=9392

By SaebaMSX

Hero (533)

SaebaMSX's picture

15-03-2009, 15:35

I don't think this is that rare. Btw, this is great that you share that hardware with everybody instead of keeping it only in Russian pages. Smile

Or at least I did not see it before!

By ant0niutti

Master (159)

ant0niutti's picture

15-03-2009, 18:45

SaebaMSX: Yes, the USB->PS2 converter work.

By cax

Prophet (3721)

cax's picture

15-03-2009, 19:41

SaebaMSX,
caro also made memory mapped RAM (512K to 2M) internal board replacement for Yamaha YIS503 machines, and works now on MSX external PS/2 keyboard adapter. Now you know what happens on Russian forum Smile

As for mouse adapter, which one is easier and cheaper - caro's or Sturaro's ?

By NYYRIKKI

Enlighted (5271)

NYYRIKKI's picture

17-03-2009, 22:34

Great... Now we only need someone to make and sell these things...

By Erikie

Champion (324)

Erikie's picture

18-03-2009, 12:16

I just ordered some necessary parts to make my prototype. When that works I can have PCBs made for $5 a piece. You need to add approx another $7.5(max) for the components so the whole thing costs around $12.5

By SaebaMSX

Hero (533)

SaebaMSX's picture

19-03-2009, 13:13

Wise decision Erikie!

And thanks for the information, Cax! That PS/2 adapter would let F700 computers to use it? Smile

By cax

Prophet (3721)

cax's picture

19-03-2009, 14:11

SaebaMSX,
if you are talking about PS/2 keyboard adapter - caro plans to connect it right where the built-in keyboard is attached to the MSX's motherboard. Currently it's planned for Yamaha YIS503 models only. If you want to ask about compatibility with other MSXes - please contact caro directly.

By caro

Champion (482)

caro's picture

19-03-2009, 17:49

Yes, my new adapter will allow to connect to the Sony HB-F700 PS/2 keyboard from the IBM-PC.

By SaebaMSX

Hero (533)

SaebaMSX's picture

20-03-2009, 20:01

These are excellent news, caro!

In fact I have 2 F700s, but one of them has no keyboard anymore (someone needed it more than myself so it was a good gift). Besides of that the F700 keyboards are crappy and most of keys won't work after some time (even if they can revive for some time). Smile