Archived from groups: alt.comp.hardware.pc-homebuilt (
More info?)
Bruce wrote:
> David Maynard <dNOTmayn@ev1.net> wrote in
> news:10jkgvaqut478d2@corp.supernews.com:
>
>
>>Bruce wrote:
>>
>>
>>>"JAD" <Kapasitor@coldmail.com> wrote in news:10jegb2ld33an19
>>>@corp.supernews.com:
>>>
>>>
>>>
>>>>remove the mouse drivers from the device manager and reboot
>>>>
>>>>
>>>>"Jeff" <Jeff@invalid.com> wrote in message
>>>>news:Xns9557CFF4EB11Fstetson@63.240.76.16...
>>>>
>>>>
>>>>>I've got an old P1 running Win98. It has a serial mouse port
>>>>
>>>>connector.
>>>>
>>>>
>>>>>I have a basic Microsoft optical wheel wired mouse that ends in a
>>>>
>>>>USB
>>>>
>>>>
>>>>>connection, that came with a USB to PS2 converter. I've been using
>>>>
>>>>it
>>>>
>>>>
>>>>>on this old machine that has a serial to PS2 connector, just fine.
>>>>>
>>>>>machine--serial port---serial/PS2---PS2/USB---USB===mouse
>>>>>
>>>>>
>>>>>I've got another machine, of similar vintage, running Win98SE. It
>>>>
>>>>also
>>>>
>>>>
>>>>>has a serial mouse port connection, to which I've plugged in a
>>>>
>>>>serial to
>>>>
>>>>
>>>>>PS2 converter, and connected an old Logitech Mouse Man Serial mouse,
>>>>>that has a PS2 plug. It's the one that has three buttons and looks
>>>>
>>>>like
>>>>
>>>>
>>>>>a bear claw. It works fine.
>>>>>
>>>>>I now want to hook up the Microsoft optical wheel wired mouse
>>>>
>>>>mentioned
>>>>
>>>>
>>>>>in paragraph 2, with the same connection set up, to this machine.
>>>>
>>>>(The
>>>>
>>>>
>>>>>bios is set to automatically recognize a PS2 mouse.)
>>>>>
>>>>>When I do, Win98 tells me no mouse was detected and if I want to
>>>>
>>>>hook up
>>>>
>>>>
>>>>>a PS2 mouse, I have to restart the machine. I have, but it still
>>>>>doesn't work. The mouse never lights up, or is recognized.
>>>>>
>>>>>Can anyone help me on this?
>>>>>
>>>>>TIA
>>>>
>>>>
>>>>
>>>Did that. No go.
>>
>>The only thing that confuses me in your dilemma is how in the world
>>you managed to get the serial
>>port---serial/PS2---PS2/USB---USB===mouse setup to work on the other
>>one because ps2 mice do not work on serial ports; the signals are just
>>not there: in particular, the ps/2 clock. The mice those PS/2-serial
>>adapters were made for are special "combo" mice that 'work both ways'.
>>
>>And not all USB mice work with the USB to PS/2 adapters either, and
>>for the same reason: USB doesn't have the data clock that PS/2 does.
>>Near as I can tell you ended up with some serendipitous combination of
>>multiple wrongs making a right.
>
>
> Hi, David,
>
> I thought I was the only one that used serendipitous.
Shows you have good taste too
So much more lyrical than 'just plain lucky', dontcha think?
> I wasn't responsible for getting it to work on that machine. I got that
> setup from our IT department, who was getting rid of the machine years
> ago. I use it mainly for storage and it's networked in my garage. I
> never really questioned the setup until I ran into the situation I have
> now. Now it confuses me, too. Next time I open up the case or go into
> the bios, I might investigate a little.
Hard to tell but I suspect the key is the USB mouse being one of those
'dual mode' things (the ones that come with PS/2 adapters) and it may even
have 'invented' a mode somehow: like the I/O lines 'sensed' it should
operate single ended, as with PS/2 style signals, but the decoder says, but
hey, it's no-clock serial data.
The problem with that is serial ports don't always work with 0-5V signals
because, 'officially', they require '1' to be <= -3V (it's a bipolar +-
3-25v signal) but modern electronics often 'cheat', because it's simple and
cheap, and simply snip off the negative swing; interpreting anything near
zero (and below) to be the 'mark' (1) signal.
Note that a single bipolar line with ground, rs232 serial, is not the same
thing as a + and - differential pair, as in USB.
>>I actually found ONE motherboard to PS/2 cable/bracket. I don't know
>>if it goes just straight on yours but maybe it could be adapted, plus
>>they claim to have great support to help with that kind of thing.
>>
>>http://www.ramelectronics.net/html/ps2-add-on-cable.htm
>>
>
>
> Funny, that's the one I found, too. The pin assignments are not the
> proper ones for the Asus I have, but I could rewire.
>
> Asus assignments are:
> 1 gnd 2 data 3 4 vcc
> 5 clk 6 7 8
Amusing as that's the same pinout as their Tyan S1571S 'tricky example', so
you have the instructions right there on the web page, assuming your pinout
list is from the same 'insert the wires' side (top view).
For 13 bucks, though, I'd probably find an old PS/2 DIN somewhere, a header
of some sort, and hack the thing myself.
> Thanks for all the help.
>
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