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It works!!!

Thanks everyone. And you were right newguy. The lcd420.c driver doesn't work with the 18F line of pics. I used the lcd.c driver(which has the port b address at 0xf81) and it works fine. ...

Well, the pic was unharmed. Not sure about my LCD yet, but at least the circuit works again, despite my stupidity.

I thnk from now on I'll have some safety diodes in place.
Thanks everyone,
-Flec ...

Sad to say, but even if that address was a problem, I'm the stupid one. I left my good power supply at home, and used one I had laying around here at school. It turns out, its output is AC, not DC.
...

I think my power supply I'm using isn't sufficient. Its only 190ma, and I have quite a bit of other circuitry connected.

My 500ma supply should arrive tomorrow, I'll post my findings.

Thanks for ...

Sure...the lcd420.c is a driver that came with the compiler, I assumed it was standard. I've tried using the lcd.c driver on port B as well. Neither seems to work.

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I'm trying to interface a 20x4 LCD display I have with my PIC18F452. I've read the forum here, and checked examples and whatnot, and I can't get it to work. The display uses the standard hitachi contr ...