Thanks to @karpour scaring up a ROM dump, I'm trying to emulate the HP Jornada 720 PDA.
The SA-1111's serial transceiver is going to be interesting to emulate, in the Chinese proverb sense: Arbitrary data size from 4-16 bits and selectable framing (SPI, TI SSP, or Microwire). 
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And another one of my systems will have an emulator.
I didn't even know WinCE devices were being done now. That's pretty interesting
"Being done now" is a *very* charitable interpretation of what I'm doing, to be honest. Most of these PDAs are an undocumented sea of GPIO pins. It's why I'm taking a break from trying to emulate the Zaurus SL-5500. Doubt I'll get far with this one either.
