Optical mouse driver

[Louis Dias]

I have an optical mouse.  It has a USB-to-PS/2 adapter on it and works fine on the PC.  I bought a PS/2 to 9pin serial adapter to plug into that adapter.  Problem is, the mouse doesn't power up now but does when I don't use the 9pin adapter.  Do I need a power source for the mouse that a serial port doesn't provide?

I want to read what the mouse is sending when it moves so I can write a driver for another machine (Gamecube Linux) but I'm sure the source would be somewhat re-useable on any platform.

[Thomas]

You cannot use an adapter on another adapter. USB, PS/2 and serial protocols are different. The mouse supports USB and PS/2 and it tries to determine where it is connected to on power-up in order to use the correct protocol. With the serial adapter it cannot determine the correct protocol and so it gives up. Usually you can use a mouse only with the adapter it came with.

Bye,
Thomas

[Louis Dias]

Thanks for the info.

Is there someplace I can look up the PS/2 mouse & keyboard protocol?

Thanks.

[Thomas]

Perhaps this can help you: http://www.computer-engineering.org/

Bye,
Thomas

[melott]

I don't know if this will help ....
I'm using a 'HP' (Hewlett Packard?) USB optical mouse
with a USB to PS2 adaptor plugged into a 'Mr.Mysza' on
my A3k ... works fine  :-)

[motrucker]

melott wrote:
I don't know if this will help ....
I'm using a 'HP' (Hewlett Packard?) USB optical mouse
with a USB to PS2 adaptor plugged into a 'Mr.Mysza' on
my A3k ... works fine  :-)

I use a Logitech optical mouse with this same interface on an A1200 - it works fine.

[Protek]

I have also an optical Logitech usb mouse connected to a usb->ps2 adapter (keyboard but I guess there's no difference) which then is connected to ps2->amiga d9 adapter and everything works fine (even the wheel).

[Thomas]

Oh dear !

You cannot compare a Cocolino or Topolino3 or whatever it is called to a simple adapter ! Why do you think it is so expensive while you can get a simple 6pin mini-din to 9pin d-sub adapter for a few bucks ? The Cocolino is not an adapter. It is a complete micro controller residing inside the case of an adapter. It understands PS/2 protocol and translates it into joystick impulses as needed by the Amiga. It works with any mouse which supports the PS/2 protocol, be it a PS/2-only mouse, a PS/2-serial combi mouse or a PS/2-USB combi mouse. It does not do any serial transmission and it is not able to tell the Computer which PS/2 codes it received from the mouse.

Bye,
Thomas