Problem with ps2 mice on 486/100 pc...

[keropi]

I recently ressurected an old 486/100 pc. I think it's mobo is one of the last made, it is a shuttle HOT-433 (4xISA + 4xPCI slots)
the problem I am having is with mice. Using an OLD serial mouse works OK. So I just plugged a serial->ps2 adapter and several different ps2 mice. nothing. Optical mice don't even get power. So I learned that if you want to use a ps2 mouse on a serial port, the mouse must be made to also operate in "serial mode" . Apparently newer ones are not....
Next step is to decrypt the 10-pin ps2 mobo connector. I found the power/ground lines and the ps2 mice get power. Next I found the 2 other tracks, data and clock... but in vain... connecting the mouse there kill the keyboard or makes it produce irrelevant characters... (maybe this "ps2" connector is just a built-in serial->ps2 one like the external version :-? ) I also tried in vain some ISA cards that have serial+parallel ports...
so, is there a solution??? is there a hardware adaptor or something?
Thanks!    :-D  :-D  :-D

[CLS2086]

Try to check the fuses around the PS2 port.

[Homer]

Keropi: Are you saying there is no PS2 port, and that you have plugged an adapter in the serial port to use PS2 mice ?

[keropi]

optically they look fine... there is only 1 track vissible to a smd resistor....

edit:

@Homer:
there are pins on the motherboard to add a ps2 port. I have done that and it just does not work... it causes the keyboard to malfunction  :-(

[KThunder]

many 486 motherboards have both a din connector and a ps2 connector for the keyboard. you can only use one. that would explain "kill the keyboard" and "irrelavent characters" plugging a mouse into a keyboard connector would do both. im assuming that your keyboard is in a din adapter or is a din style keyboard.
your only option may be to use an old serial mouse or keep looking till you find a ps2 to serial and ps2 mouse combo that works.

[keropi]

KThunder wrote:
many 486 motherboards have both a din connector and a ps2 connector for the keyboard. you can only use one. that would explain "kill the keyboard" and "irrelavent characters" plugging a mouse into a keyboard connector would do both. im assuming that your keyboard is in a din adapter or is a din style keyboard.
your only option may be to use an old serial mouse or keep looking till you find a ps2 to serial and ps2 mouse combo that works.

perhaps this is the case, though the manual says it is a PS2 mouseport! I can clearly see that one pin from the keyboard and one from the "mouseport" are connected. I always thought this was the "clock" line...

edit: I see now on my k6-II machine that has a functional ps2 mouseport that indeed some lines are connected.
I bet the 486 mouseport is bogus  :angry:

[CLS2086]

Hum, just a common little joke, did you check the point with the manual ? I had some memories about "uncommon" wirring PS/2 and USB...

[keropi]

funny part: the manual just has a sentence about the mouseport:

J10 - PS2 mouseport

and nothing else  :madashell:
ofcourse I don't have the motherboard's ps2 connector, I use another one I modified...

[keropi]

OK, I am screwed on ps2 for my mobo:

look what I found in one of it's bios releases:

Caution: This version BIOS(433AUS26) is for HOT-433 motherboard which support
         PS/2 mouse.  If your motherboard support does NOT PS/2 mouse, please
         download different version BIOS other than this one.
         To tell if your motherboard will support PS/2 mouse, just verify
         if your motherboard has external keyboard BIOS.  If it does, it
         will support PS/2 mouse.  If the keyboard BIOS socket is empty,
         it will NOT support PS/2 mouse.


...and ofcourse mine does not have this chip  :madashell: