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Old 17 October 2007, 23:06   #1
keropi
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Question Problem with ps2 mice on 486/100 pc...

(I really don't know to what forum to post this, since the OT section is not visible any more to all...)

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!
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Old 17 October 2007, 23:21   #2
Zetr0
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@Keropi

hello there my friend, guess what I have just wrapped up for post tomorrow (i finally found them!!!)

now I believe the problem as you say is the RS232 (serial protocol) to PS2( TTL protocol) conversion.

here is the problems

PS2 operates at 5v / Serial operates 9-10v

PS2 & Serial use different protocols

but this i believe you have already discovered this.

I might have a spare serial mouse, although, its been a while since i have seen one.... the last one I remember was made by Kingston.

eBay is your best bet however.....
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Old 17 October 2007, 23:23   #3
keropi
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bah, that is the point, I don't want to get a bunch of serial mice which are not even optical... there must be a solution
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Old 17 October 2007, 23:47   #4
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yes.... but its a little complicated...

you would need to design an PS2 TTL 5v Logic to be compatible to RS232 Serial 10v... you would also need a micro controller to exchange protocols

its not simple, and it would be expensive... a better idea would be to figure a way to get USB controller on that computer...

if you need a pci USB controller, i might have one some where.... not sure if it works though.....

then all you gotta do is make sure you can get a usb driver and stack working in your OS.
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Old 17 October 2007, 23:59   #5
keropi
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I want a pc cocolinoooo!!!!!!!!!
I plan to use it for DOS only, so usb is not an option me thinks...
I am still researching it.....
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Old 18 October 2007, 00:36   #6
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you know those PS2 - MOUSE IT serial connectors for the Amiga.....

I wonder if they would have the conversion hardware.... all you would need to do is change the DB25 COM to DE9 COM
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