This is my first use of an 18F device, MPASM and posting to this forum.

I'm moving from a 16F877 to an 18F252. My code assembles fine and loads without errors but does not run - there is no oscillation from resonator, so I'm sure it isn't a code problem. Shouldn't it work using the manual settings in the programmer, like HS for 20MHz, etc? Configuration does not NEED to be set in code, does it? Does this device need something really unique that I've missed from reading the manuals?

I built up a second board and it does the same. I'm quite sure it isn't hardware.

Thanks, Bob