IOC on 18F2580?

[richard]

Does this mean that I cannot use an interrupt for this task on this MCU?

why not use one of the interrupt pins int0 int1 int2
alternatively
portb pins 4 to 7 have interrupt on change capability

read data sheet interrupt section and i/o port sections chapters 9 and 10

[PaulMaker]

Greetings Richard,

you are correct. I can use RBC interrupt.

The only limitation is that, between RB4 and RB7, the pins that will trigger the interrupt are the ones set as inputs.
If I only want one pin, I need to set the others as outputs.

Thank you so much for your help.

Best regards