myke predko wrote:
>
> >I have recently discovered the PIC16C84 - it is indeed a wonderous chip!
> > However, I struck a problem with my
> >first large-ish program.
> >

> How are you jumping to the return/retlw?
>
> If you are using a computed jump (ie movlw EndOff/addwf PCL, f) and the
> return is at 0x0100, you're gonna have problems (PCLATH has to be changed).
>
> Are you simulating the program (this should show you exactly what happens).
> If it is the computed jump, then you will see the code jump to 0, not 0x0100.
>
> myke

Yes, I am using a computed jump as above and no, I haven't yet investigated a
 simulator - one shakey step at a
time:)

I have found the bit about PCLATH in the data sheets and will study it.

Thanks for yours and other's help - this will be a useful area!

Richard