I'd like to learn about using interrupts and have been reading several of the timer interrupt threads and looks like some fancier stuff as well. However, I'm trying to start with understanding it in PBP listening to a couple inputs then bake in some timing and high or low priority.

But before I get there I'm not understanding the nomenclature in the manual on p108. I'm using a PIC 18F6520. and the manual has:
INTCON = %10010000 'enable RB0 interrupt

I don't quite get this statement. Can external interrupts only be read on the RB# port?
And then the 10010000, is this presetting the values for each RB_ to all zeros except for the 5th and 8th to 1?

Then to further confuse myself the code sample I'm looking at which doesn't use interrupts at all (to the best of my knowledge) has a line in the declarations:
INTCON2.7 = 0
I'm not sure what this one means or if it has something to do with interrupts or not.

I've been able to teach myself quite a bit from the manual but this one has me stumped.

Any help is appreciated.
Thank you,
Hylan