On Sun, 2003-02-09 at 01:42, Scarlet Otter wrote: I have never seen them, the PS-2 ports were controlled by the keyboard controller chip, if I remember correctly, so I would think it would be hard to make a add-in card since it would have to take over some of the functions of the keyboard controller. I have seen plans on the net that convert PS/2 to serial using a PIC chip ... you could try google for one of them. I could use a USB => PS/2 mouse adapter, so far I have not found any such animal. I've found plenty that go the other way. Regards, Paul

Ian Primus wrote: I have one of those for my Logitech trackball. However, I don't think they are general-purpose USB-to-PS/2 adaptors. Such a device would require quite a bit of intelligence and probably wouln't fit in the very small adaptor. More likely, those adaptors are passive connector adaptors that also signal back to the mouse (or trackball or whatever). When the mouse starts up, it detects the adaptor and changes the behaviour of the interface accordingly. Does anybody know for sure? -- John Honniball coredump(a)gifford.co.uk

TeoZ wrote: I use a KVM like this: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3401251919&categ… This is a Cybex SwitchView. Note that the console ports are ps/2. The computer ports have both ps/2 and serial mouse connections (don't connect both serial and ps/2 mice cables to one computer). Use a ps/2 to AT keyboard adapteron the ps/2 keyboard cable and the serial mouse cable for AT boxes. Use both ps/2 cables for ps/2 boxes. Note that not all Cybex SwitchView KVM's have both serial and ps/2 mouse connectors. Martin

+AD4- I could use a USB +AD0APg- PS/2 mouse adapter, so far I have not +AD4- found any such animal. I've found plenty that go the other way. Think this is one. It isn't a passthru. http://www.cyberguys.com/cgi-bin/sgin0101.exe?T1+AD0-131+-0870 On the subject... I see a lot of PS/2-female to RS232/D9-male adaptors. I assume that these are for signal sensing mice, since these adaptors Are passthru, and I get the impression John A.

While this is true on the genuine PS/2 machines (and the mouse protocol is very similar to a PC/AT or PS/2 keyboard protocol), there's no reason why it _has_ to be. It would be possible to make an ISA card with a programmed microcontroller on it (maybe an 8042, like the keyboard controller) with the host port at some otherwise unused I/O address, and then use a special driver (similar in concept to the serial and bus mouse drivers) to access it. -tony

I wanted a PS2 mouse not keyboard connector. I mentioned AT as case and motherboard style, ATM motherboards came with ps2 ports built in. ----- Original Message ----- From: "Brian Chase" &lt;vaxzilla(a)jarai.org&gt; To: &lt;cctalk(a)classiccmp.org&gt; Sent: Sunday, February 09, 2003 11:59 AM Subject: Re: PS2 Mouse <http://www.tigerdirect.com/applications/SearchTools/item-details.asp?sku=TC 1-1001>

Maybe I didnt explain what I want to do well enough. I have a 4 port SOHO KVM switch (4 computers to 1 monitor, ps2 mouse, ps2 keyboard, 1 pair of speakers, 1 microphone, also switches USB but no way a 386 will do USB). This device only uses ps2 inputs and outputs for keyboard and mouse, not serial mice. Using an adapter would just feed a ps2 mouse signal to a serial communication port causing all kinds of hell on the KVM switch like giving a digital signal to a device waiting for analog data. Even if the mouse could run serial and ps2 the mouse would detect the device its attached to (kvm not the computer) as ps2. The only way to get what I want would be to get an onboard ISA card that accepts ps2 mouse input that is being fed to it from the KVM. I was hoping some industrial computer company would have made such an adapter card so that you would free up the serial ports for communications to other devices. This was done with Bus mice, but that interface quickly died out so I assumed they might have made one that used PS2 (since ps2 mice are still plentiful new) to retrofit the older systems. If a card did exist it would most likely be in a cheap surplus equipment bin since 10+ year old industrial computers would be getting replaced by now. Only other option is to replace a perfectly good 386DX40 computer with a name brand Gateway 386 type of computer that had ps2 ports built into its proprietary motherboard which I would rather not do. So for the moment I am stuck with another mouse on my desktop.. things could be worse. Just seeing if there was a more elegant solution. ----- Original Message ----- From: "Scarlet Otter" &lt;SecretaryBird(a)SoftHome.net&gt; To: &lt;cctalk(a)classiccmp.org&gt; Sent: Sunday, February 09, 2003 1:10 PM Subject: Re: PS2 Mouse

On Sun, 9 Feb 2003, TeoZ wrote: Ahh.. Pre-coffee thinking has ruined the day! -brian.