PIC to PIC communication between 18F4620 & 10F202

[mackrackit]

If you can not get it working in a loop you will never get an interrupt to work.
Take a look at this
http://melabs.com/samples/PBP-mixed/serin.htm

[CuriousOne]

Have you set DEFINE_OSC to proper values on both chips? various speeds can cause devices not to listen each other properly, unless you use HSERIN statement.