Hans;<br><br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Sorry, I was thinking about a graphics tablet.</blockquote>
<div><br>I suspected a misunderstanding like that. I'm well aware that graphics tablets are currently unsupported. I was avoiding the word "scratchpad" as on this evening I was experimenting with a mouse-based DIY turtable so I imagined that might result in confusion later on and the word "trackpad" eluded me. Sorry, my fault.<br>
</div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> I'm looking on<br>
<a href="http://en.wikipedia.org/wiki/USB_human_interface_device_class" target="_blank">http://en.wikipedia.org/wiki/USB_human_interface_device_class</a><br>
The HID protocols are evidently only for USB connections.<br>
</blockquote><div><br>Well, yes, strictly speaking. However I have been using PS/2 keyboards with ChucK for quite a while (because my favourite keyboards pre-date the USB standard) and have never had a issue with those under ChucK. I'd also like to point out that if this device were completely unlike a HID device the ChucK HID abstraction should be unable to open it. Instead it dutifully reports it's a PS/2 device. My issue is that it does get opened as a mouse but that it doesn't give any data. If ChucK would say "Hey, I see no USB mouse so you can't have a HID abstraction of any mouse at all." it'd have to admit that that would be inconvenient yet fair.</div>
<div><br>I'm not familiar with the Mac situation, having never owned one, but this is a bog-standard setup for non-Mac laptops. I believe it even makes sense as supposedly PS/2 has some advantages over USB for mice in how it uses system bus bandwith. We'd need to consult a hardware expert to verify that; I certainly don't know that much about motherboard architecture or OS design. This might also be limited by factors like maximum poll-rate and resolution; I'm not sure but I don't think trackpad makers are very concerned with those factors; these are hardly expensive high-performance interface devices.<br>
<br>Interestingly; according to ChucK there is a second mouse device here that can be opened which looks like a emulation layer for macintosh mice. I have no idea what that's doing there and why but it's not giving me any useful signals either. I could look up the exact name if that would be relevant but I would suspect it's simply there in case Ubuntu would be installed on a Macbook. Maybe Apple instead uses a internal USB bus or something else altogether.</div>
</div><br>Yours,<br>Kas.<br>