You really DO need to download and look at the Datasheet for the PIC you're using.

Look in the section near the end entitled SPECIAL FEATURES OF THE CPU, there you will find the section on INTERRUPTS. Different PICs have different arrangements - the Datasheet tells you what is and isn't available on that PIC.

For example, on the 16F628, you get a PortB.0 interrupt, the only other interrupts available on PortB is a single combined interrupt for the four Ports B.4 through B.7. This arrangement is NOT GUARANTEED on every chip (since some don't have a PortB or only have a partial PortB).