pic18 low interrupt
Maybe this can help you.
PIC17CXXX to PIC18CXXX Migration: **broken link removed**
You can try to look here as well. Migrating Designs from PIC16C74A/74B to PIC18C442: **broken link removed**
PIC16 to PIC18 Code Conversion Techniques:
**broken link removed**
**broken link removed**
Copied from 00726a.pdf:
External Interrupts
For the PIC17CXXX, the INT interrupt had its own vector
address. In the PIC18CXXX, it is part of the peripheral
interrupts vector address. This means that the INT
interrupt code will need to be moved into the general
peripheral interrupt service routine (ISR), and this routine
will need to add a check for the INT interrupt
source.
The PIC18CXXX family has some enhancements for
the external interrupts. First, there are now three external
interrupt pins, as opposed to one pin in the
PIC17CXXX family. Second, enhancements to the
architecture of the interrupt logic allows additional
capability (High/Low priority). These enhancements
are discussed in the section “Architectural Enhancements”
.