Using the UART of the NC100/200?

[Prodatron]

I'm currently working on a mouse driver for the SymbOS port of the NC100/200.
I can't test this at home right now as I'm still looking for a way to write SRAM cards.

So Edo and I have to do remote testing, which is a bit annoying. His serial mouse shows nice and correct values in the NC terminal program, but somehow I can't get it to communicate properly with my driver code.

So I'm wondering if there are any source codes for the NC and the UART to receive data over the serial port?

I've read that parts of the ROMs have been disassembled, but I can't find anything like that.
Any hints would be very welcome!

[GUNHED]

Could it be a problem of 5V vs. 12V?

Does the NC100 serial interface work with 12 Volts?