Xternal oscillator signal??

[skimask]

As far as setting fuses I assume that when I choose 'EXTClk' as the oscillator fuse setting in ICProg that the correct settings will be applied. Perhaps I just didn't give the PIC time to fire. I will check the frequency of my 555 oscillator and try again. Please just clarify one thing: ?I totally vanish my XTAL setup (ie crystal and caps) and replace with a signal line in to RA7 from whatever oscillator setup I wish to use?

Yep, get rid of it all.
But, a 555 output will only work as an OSC1 input to the '628A if the 555 output swings far enough high and/or low. You might have to put some sort of buffer between the 555 and the PIC.

[Melanie]

OK, I'm now going to kick you where it hurts with my spikey heel just to make you feel doubly bad...

Your example code...

Fault 1.

The 16F628A has ANALOG feature pins on PortA. If you don't switch the ANALOG features OFF first, some of those pins won't work.

Fault 2.

Look at the PBP Manual. HIGH and LOW commands only work on an individual PIN and not on an entire PORT!

Fault 3.

Oh, and the 'device=' statement probably means you're on the wrong forum... so you defiitely deserve that kick! *smiles*