P18F4550:
it's been a while since i used proton basic but a few things to check are you tx & rx wires are the right way round, also serial polarity because if your using a max 232 between uC ans PC the signal will be inverted, you can set that in basic, I dont think the f88 has hardware uart so forget HSER, stick with serin serout, make sure your xtal frequency is correctly define or serial wont have a chance, for now forget arduino part of it and just get the pic to talk to pc
I suppose that's what I should do, but all the computers I have access to run windows 7, so getting access to hyperterminal will be an issue.....I have checked and rechecked my TX and RX wires (TX to RX, vice versa). And no, I'm not using a max232 or anything like that.
Thanks!