Hi Steve,

I've been using 18F452's so this 18F4550 is all new to me, you think 20mhz is too slow? you could be right, should i dump the crystal and use the internal osc, i think i saw in the settings that it had an internal osc, i've built a new dev board just for this controller as the pinout is slightly different to the F452, i've still kept a max232 on the board for serial comms.
I've been looking at the Bootloader for the F452, do you think it would be possible to make it function on the FR4550 with some adjustment, like i said the F4550 is new to me so forgive me if im talking cr*p

Shaun