grb101

I have limited router attachments and have decided to build a headboard and footboard using 1" by 7" fir. I want to mortise the boards into the corner posts 1" using a 1/2" straight bit. If this is possible, how do I start the mortise as the bit has a flat end ?? Would I have to drill a 1/2" hole to start the route and try to line up the bit with the hole ?? Also, how deep should I route on each pass to get 1" deep ??

Thanks, grb101