Hi guys,
I am still working in my free time at that board computer i am tryig
to make for my old Lada. I discovered the problem with the interrupt
was actually not a real problem but a Proteus VSM emulation problem.
You were right ! :)
I made the real circuit and now it's ok. My question now is a
different one however. I set up the micro i will use (18F2525) to
accept interrupts on change from PORTB. When i try to use RB4 i get
absolutely nothing, no interrupt. When i use RB5 to RB7 everything
goes as planned. I set in configuration bits to have RB4-7 set as
digital inputs. I have this setup :


        ADCON0 = 0;           //disable ADC
        ADCON1 = 0x0F;        //all AN1-AN12 are digital inputs

        TRISB = 0xFF;         //PORTB bits are input
        PORTB = 0;
        LATB = 0;             //clear latches

        INTCON = 0x28;        //disable global and enable TMR0 interrupt and RB
        INTCON2 = 0x85;       //TMR0 high priority
        INTCON3 = 0x00;       //Disable external interrupts

        RCONbits.IPEN = 1;    //enable priority levels
        INTCONbits.GIEH = 1;  //enable interrupts

I read the datasheet in PORTB section, in Interrupts section and in
ADC section but i cannot find anything to explain my problem. Have you
ever bumped into something like this ? Maybe i fried my RB4 pin ?

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