Hi Steve,

You can pretty much do the same jump table as you might got used to it on
the 16F using math operation on the PCLATU:PCLATH:PCL, except that:

1. On a 18F the addressing of he program memory is in bytes, not in words
-- and as 1 word is 16 bit on a 18F you need to count 2 bytes per
instruction

2. However, there are 2 word sized instructions such as GOTO, CALL, MOVFF
etc (use BRA and RCALL instead if you can)

3. You may also want to study the CALLW instruction which is a good thing
in many times

Tamas



On 15 January 2012 13:19, M.L. <m@lkeng.net> wrote:

> On Fri, Jan 13, 2012 at 2:43 PM, Steve Willoughby <steve@alchemy.com>
> wrote:
> > I'm trying to implement my first PIC18 project (after spending all my
> > PIC work so far in the PIC16 family).  So far it's a big improvement bu=
t
> > I'm having a little trouble figuring out the best way to do jump tables
> > in this architecture.
> >
> > I have three questions around this which I haven't seen anything
> > specific to the PIC18 family in my searching so far:
>
> Steve,
> One thing I would recommend is using the MPLAB simulator to step
> through your code. This should work very well for illustrating what
> the PIC is doing internally.
>
> --
> Martin K.
>
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>



--=20
int main() { char *a,*s,*q; printf(s=3D"int main() { char *a,*s,*q;
printf(s=3D%s%s%s, q=3D%s%s%s%s,s,q,q,a=3D%s%s%s%s,q,q,q,a,a,q); }",
q=3D"\"",s,q,q,a=3D"\\",q,q,q,a,a,q); }
--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.