JN:
I am not sure exactly what you are trying to do ... but an interrupt
does not affect your 'circle' code. If you want to exit circle after the
interrupt try this

#DEFINE iflag   var1,0  ;define bit 0 of GP variable as a flag

        bcf     iflag
circle  btfss   iflag
        goto    circle
nocircle
        .
        .
        .

then in your isr, include the intsruction
        bsf     iflag

> circle  goto    circle
>
> waiting for an interupt.  when the isr is finished and I use the retfie
> command, will it increment the program counter to execute the instruction
> after this one? or if it doesn't is there a way that I can increment the
> program counter myself? thanks
>
> Jonathan Newport