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While it won't be this "PenPoint" product you want, 386SL still has a MMU and supports 32-bit protected mode, no FPU though (..unless NCR added one).
You could likely install an older version of NetBSD or Linux on the system.
I don't know how the touchscreen is implemented, but there may be X drivers.
You would be surprised what you can order from IBM if you have the part number...
http://ps-2.kev009.com:8081/pcpartnerinfo/ctstips/8a06.htm
Don't forget about the Magic Cap operating system, developed by General Data for mobile PDA devices. Both Sony and Motorola made devices and for a while, there was even a version that ran on Windows.
http://en.wikipedia.org/wiki/Magic_Cap
http://www.guidebookgallery.org/guis/magiccap
http://www.guidebookgallery.org/articles/sonyreleasesmagiccapdevice
Magic Cap was made by General Magic.
Magic Cap itself started life as a project within Apple, but gained little traction with upper management, so the team involved managed to spin out the company as a separate entity. The key figures involved included Macintosh creators Andy Hertzfeld and Bill Atkinson.
I have the book by Robert Carr, Dan Shafer, I bought it for $1 shortly after ATT? threw in the towel. A shame really, it seemed far ahead of it's time even when I bought it. Would have loved to have played with the device too.
It's been gathering dust next to my other tomes on deceased OSes like Taligent, BeOS. At some point all of this library will hit the big dumpster because owning it is only for people living in the distant past (moi).
I don't edit Wikipedia (and certainly not to inject my own article!), but others are obviously free to do so. I'll be sure to clearly label any photos as CC.




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