On 22/03/2011 01:27, Oli Glaser wrote: > I was looking for something peripheral wise that could be affecting > things, and I noted one difference is PORTA doesn't have the weak pull > up. Is the weak pull up still on? I notice you have RBPU set to 0 in the > code (I just looked in my datasheet and it says it's inverted logic - > try setting to 1) Ignore this stuff (written in the early hours, half asleep..) I=20 remembered the pull ups are disabled anyway when the port is set to=20 output (not sure why they would cause a problem anyway) --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .