Masked interrupts!

Art, Henrik,
If interrupts are enabled in INTCON Control Register with Global GIE, all individual interrupts are masked if the item/items of interest are cleared and not in use. let us say RBIE Port B interrupt-on-change, RBIE is set to 1, RBIE is now unmasked and ready for use.

If we look at the 18F25K22 as Henrik has used for an example, GIE=1 Enables all unmasked interrupts, PEIE=1 Peripheral Interrupt Enable bit, RBIE=1 unmasked the PortB interrupt-on-change interrupt, it is now ready for use. All other interrupts are masked and not in use. If we look at page 161 para 11.5 Timer0 Interrupt, “The interrupt can be masked by clearing the TMR0IE bit of the INTCON register.
At least that’s the way I understand it.
Wayne